UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K


☒			ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE FISCAL YEAR ENDED December 31, ~~2024~~2025


☐			TRANSMISSION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE TRANSITION PERIOD FROM TO

COMMISSION FILE NUMBER: 001-35518

SUPERNUS PHARMACEUTICALS, INC.

(Exact name of registrant as specified in its charter)


Delaware			20-2590184
(State or other jurisdiction of incorporation or organization)			(I.R.S. Employer Identification Number)

9715 Key West Avenue	Rockville	MD	20850
(Address of Principal Executive Offices)			(zip code)
	(301)	838-2500
	(Registrant's telephone number, including area code)

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

TITLE OF EACH CLASS:

February 1824, ~~2025~~2026

Trading Symbol

NAME OF EACH EXCHANGE ONWHICH REGISTERED:

Common Stock, $0.001 Par Value

5557,~~814~~581,~~496~~712

SUPN

NASDAQ Stock Market LLC

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: NONE

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer

☒

Accelerated filer

☐

Non-accelerated filer

☐

Smaller reporting company

☐

Emerging growth company

☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. Yes ☒ No ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒

As of June 30, ~~2024~~2025, the aggregate market value of the common stock held by non-affiliates of the registrant based on the closing price of the common stock on the NASDAQ Global Market was $1,~~413~~694,~~025~~871,~~683~~061.

DOCUMENTS INCORPORATED BY REFERENCE

Certain portions of the registrant's definitive Proxy Statement for its 2026 Annual Meeting of Stockholders, which will be filed with the Securities and Exchange Commission not later than 120 days after the end of the registrant's 2025 fiscal year end, are incorporated by reference into Part III of this Annual Report on Form 10-K.

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SUPERNUS PHARMACEUTICALS, INC.

FORM 10-K

For the Year Ended December 31, ~~2024~~2025

TABLE OF CONTENTS

		Page
PART I
Item 1.	Business	4
Item 1A.	Risk Factors	2833
Item 1B.	Unresolved Staff Comments	6672
Item 1C.	Cybersecurity	6672
Item 2.	Properties	6874
Item 3.	Legal Proceedings	6874
Item 4.	Mine Safety Disclosures	7283
PART II
Item 5.	Market For Registrant's Common Equity, Related Stockholder Matters and Issuer Purchase of Equity Securities	7383
Item 6.	Reserved	7485
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	7586
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	87100
Item 8.	Financial Statements and Supplementary Data	88102
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	~~132~~159
Item 9A.	Controls and Procedures	~~132~~159
Item 9B.	Other Information	~~132~~160
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	~~133~~160
Item 11.	Executive Compensation	~~133~~160
Item 12.	Security Ownership of Certain Owners and Management and Related Stockholder Matters	~~133~~160
Item 13.	Certain Relationships and Related Transactions, and Director Independence	~~134~~161
Item 14.	Principal Accounting Fees and Services	~~134~~161
PART IV
Item 15.	Exhibits, Financial Statement Schedules	~~135~~162
Item 16.	Form 10-K Summary	~~135~~162
	SIGNATURES

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Unless the content requires otherwise, the words "Supernus," "we," "our" and "the Company" refer to Supernus Pharmaceuticals, Inc. and/or one or more of its subsidiaries, as the case may be. These terms are used solely for the convenience of the reader. Supernus Pharmaceuticals, Inc. and each of its subsidiaries are distinct legal entities. For example, MDD US Operations, LLC, a wholly-owned indirect subsidiary of Supernus Pharmaceuticals, Inc., is the exclusive licensee and distributor of APOKYN and ONAPGO in the United States and its territories. Adamas Operations, LLC ("Adamas Operations"), a wholly-owned indirect subsidiary of Supernus Pharmaceuticals, Inc., wholly owns the patents and patent applications related to GOCOVRI and Osmolex ER and has a license agreement with Supernus Pharmaceuticals, Inc., granting Supernus Pharmaceuticals, Inc. rights to market and sell GOCOVRI. Sage Therapeutics, LLC, a wholly-owned subsidiary of Supernus Pharmaceuticals, Inc., has granted Supernus Pharmaceuticals, Inc. a license to market and sell products containing zuranolone in the United States.

We, including our subsidiaries, are the owner/licensee of various U.S. federal trademark registrations (®) and registration applications (TM), including the following marks referred to in this Annual Report on Form 10-K, pursuant to applicable U.S. intellectual property laws: "Supernus®", "Microtrol®", "Solutrol®", "Qelbree®", "GOCOVRI®", "Oxtellar XR®", "APOKYN®", "Trokendi XR®", "XADAGO®", "MYOBLOC®", "Osmolex ER®", "Namzaric®", "ONAPGOTM", ZURZUVAE®, and the registered Supernus Pharmaceuticals logo.

All trademarks or trade names referred to in this Annual Report are the property of their respective owners. Solely for convenience, the trademarks and trade names in this Annual Report on Form 10-K are referred to without the ® and ™ symbols, but such references should not be construed as any indicator that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto.

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PART I

This Annual Report on Form 10-K contains forward-looking statements within the meaning of the Securities Exchange Act of 1934 and the Securities Act of 1933 that involve risks and uncertainties. Forward-looking statements convey our current expectations or forecasts of future events. All statements contained in this Annual Report other than statements of historical fact are forward-looking statements. Forward-looking statements include statements regarding our future financial position, business strategy, budgets, projected costs, plans, and objectives of management for future operations. The words "may," "continue," "estimate," "intend," "plan," "will," "believe," "project," "expect," "seek," "anticipate," "should," "could," "would," "potential," or the negative of those terms and similar expressions may identify forward-looking statements, but the absence of these words does not necessarily mean that a statement is not forward-looking.

~~These forward-looking statements include expectations regarding the potential benefits and commercialization of ONAPGO.~~ In addition to the factors mentioned in this annual report, such risks and uncertainties include, but are not limited to, the Company's ability to sustain and increase its profitability; the Company's ability to raise sufficient capital to fully implement its corporate strategy; the implementation of the Company’s corporate strategy, including the successful identification and implementation of business development opportunities; the Company's future financial performance and projected expenditures; the Company's product research and development activities, including the timing and progress of the Company's clinical trials, and projected expenditures; the Company's ability to receive, and the timing of any receipt of, regulatory approvals to develop and commercialize the Company's product candidates; the Company's ability to protect its intellectual property and operate its business without infringing upon the intellectual property rights of others; the Company's expectations regarding federal, state and foreign regulatory requirements; the therapeutic benefits, effectiveness and safety of the Company's product candidates; the accuracy of the Company's estimates of the size and characteristics of the markets that may be addressed by its products and product candidates; the Company's ability to increase its manufacturing capabilities for its products and product candidates; the Company's projected markets and growth in markets; the early entry into the market of generic equivalents to all the Company's approved products; the Company's ability to develop successful product formulations that are accepted by patients, physicians, and payors; availability of potential funding sources; the Company's ability to meet its staffing needs; ~~the Company's ability to comply with the Corporate Integrity Agreement~~ and other risk factors set forth from time to time in the Company's filings with the Securities and Exchange Commission made pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended.

You should not place undue reliance on these forward-looking statements, which speak only as of the date of this report. All of these forward-looking statements are based on information available to us at this time, and we assume no obligation to update any of these statements. Actual results could differ from those projected in these forward-looking statements as a result of many factors, including those identified in the "Business," "Risk Factors," "Management's Discussion and Analysis of Financial Condition and Results of Operations" sections, and elsewhere in this Annual Report on Form 10-K. We urge you to review and consider the various disclosures made by us in this report and those detailed from time to time in our filings with the Securities and Exchange Commission that attempt to advise you of the risks and factors that may affect our future results.

ITEM 1. BUSINESS.

Overview

Supernus Pharmaceuticals, Inc. (the Company) is a biopharmaceutical company focused on developing and commercializing products for the treatment of central nervous system (CNS) diseases. The Company's diverse neuroscience portfolio includes approved treatments for attention-deficit hyperactivity disorder (ADHD), dyskinesia in Parkinson's Disease (PD) patients receiving levodopa-based therapy, hypomobility in PD, postpartum depression (PPD), epilepsy, migraine, cervical dystonia, and chronic sialorrhea. The Company is developing a broad range of novel ~~CNS~~ product candidates ~~including new potential treatments~~ for ~~epilepsy, depression, and other~~ CNS disorders.

The Company was incorporated in Delaware, commenced operations in 2005, became publicly traded in 2012, and is listed on the NASDAQ Stock Exchange under the ticker symbol SUPN. Our principal executive offices are located in Rockville, Maryland. Our extensive expertise in product development has been built over the past 30 years: initially as a stand-alone development organization; then, as a United States (U.S.) subsidiary of Shire Plc (Shire, a subsidiary of Takeda Pharmaceutical Company Ltd.); then upon our acquisition of substantially all of the assets of Shire Laboratories, Inc. in 2005, as Supernus Pharmaceuticals, Inc.

Acquisition of Sage Therapeutics, Inc. and Reorganization

On June 13, 2025, the Company entered into a Merger Agreement to acquire Sage Therapeutics, Inc (Sage). Under the terms of the Merger Agreement, the Company commenced a tender offer to acquire all outstanding shares of Sage, par value $0.001 per share (the Shares and each, a Share), at an offer price of (i) $8.50 per share in cash, less any applicable withholding taxes and without interest (the Cash Amount; an aggregate of approximately $561 million paid as of the acquisition date), plus (ii) one contingent value right per Share (the CVR; an aggregate of approximately $234 million, subject to the achievement of

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specific contingencies), which represents the right to receive up to $3.50 and is governed by the terms of a contingent value rights agreement entered into between the Company and the CVR agent (the CVR Agreement). Any amount payable pursuant to the CVRs is payable, in cash, less any applicable withholding taxes and without interest (the Cash Amount plus the CVR, collectively; or any higher amount per Share paid pursuant to the Offer, the Offer Price).

Subject to the terms of the CVR Agreement, (1) $1.00 per share would be payable if in any calendar year between closing and end of 2027, annual net sales (as defined in the CVR Agreement) of ZURZUVAE allocable to Supernus or any of its affiliates reach $250 million or more in the U.S., (2) $1.00 per share would be payable if in any calendar year between closing and end of 2028, annual net sales (as defined in the CVR Agreement) of ZURZUVAE allocable to Supernus or any of its affiliates reach $300 million or more in the U.S., (3) $1.00 per share would be payable if in any calendar year between closing and end of 2030, annual net sales (as defined in the CVR Agreement) of ZURZUVAE allocable to Supernus or any of its affiliates reach $375 million or more in the U.S., and (4) $0.50 per share would be payable upon the first commercial sale in Japan to a third-party customer after regulatory approval for ZURZUVAE for the treatment of major depressive disorder (MDD) in Japan by June 30, 2026. The maximum amount payable with respect to a CVR issued in respect to each Share is $3.50. The transaction closed and the Company completed the acquisition of Sage on July 31, 2025.

Following the Sage Acquisition, during the third quarter of 2025, Sage Therapeutics, Inc. was reorganized into Sage Therapeutics, LLC.

Our Strategy

Our mission is to improve the lives of patients suffering from CNS diseases. Our vision is to be a leader in the CNS industry by developing and commercializing new medicines for the treatment of CNS diseases. Key elements of our strategy to achieve this vision include:

•Drive growth and profitability. Using dedicated sales and marketing resources in the U.S., we continue to drive the revenue growth of our key marketed products.

•Advance product candidates toward commercialization. Several product candidates ~~in our pipeline~~ are in ~~early-to-late~~various ~~stage~~stages ~~clinical~~of ~~testing, and moving toward being commercially available to patients~~development.

•Continue to grow our pipeline. We continue to evaluate and develop additional CNS product candidates that we believe have significant commercial potential through our internal research and development efforts.

•Target strategic business development opportunities. We actively explore a broad range of strategic opportunities. This includes in-licensing products and entering into co-promotion and co-development partnerships for our commercial products and product candidates, as well as acquisitions of businesses with either or both commercial products and product candidates.

Commercial Products

Our commercial products, including those sold by or through our subsidiaries, include:

Qelbree®

Qelbree (viloxazine extended-release capsules) is a novel non-stimulant product indicated for the treatment of ADHD in adults and pediatric patients 6 years and older. On April 2, 2021, the FDA approved Qelbree for the treatment of ADHD in pediatric patients 6 to 17 years of age. In May 2021, the Company launched Qelbree for pediatric patients in the U.S. On April 29, 2022, the FDA approved Qelbree for treatment of ADHD in adult patients. The Company launched Qelbree for adult patients in May 2022. In January 2025, the FDA approved an expanded label update for Qelbree to include new data on the pharmacodynamics and use in breastfeeding mothers.

GOCOVRI®

GOCOVRI (amantadine) extended-release capsules isare the first and only FDA-approved medicine indicated for the treatment of dyskinesia in patients with PD receiving levodopa-based therapy, with or without concomitant dopaminergic medications, and as an adjunctive treatment to levodopa/carbidopa in patients with PD experiencing "OFF" episodes.

GOCOVRI was approved by the FDA in August 2017 for treatment of dyskinesia and in February 2021 as an adjunctive treatment for "OFF" episodes. The February 2021 update to the label indication makes GOCOVRI the only medicine clinically proven and approved to reduce both "OFF" episodes and dyskinesia in PD patients taking a levodopa-based medication, resulting in a clinically meaningful increase in good "on" time without the need for a "trade-off' when managing these motor complications.

Oxtellar XR®

Oxtellar XR is indicated for treatment of partial-onset seizure in adults and children 6 years of age and older. Oxtellar XR is the first once-daily extended-release oxcarbazepine product indicated for the treatment of epilepsy in the U.S. market. In 2013, we launched Oxtellar XR for adjunctive therapy in the treatment of partial-onset seizures in adults and children 6 to 17 years of age. In January 2019, we launched Oxtellar XR for monotherapy treatment of partial onset epilepsy seizures in adults and children 6 to 17 years of age.

APOKYN®

APOKYN (apomorphine hydrochloride injection) is a product indicated for the acute, intermittent treatment of hypomobility or "OFF" episodes ("end-of-dose wearing off" and unpredictable "on-off" episodes) in patients with advanced PD. APOKYN's adjustable dose subcutaneous injection pen is designed to quickly and reliably reverse the effects of oral levodopa wearing off in patients with inadequately controlled PD.

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The Company has entered into settlement agreements with third parties permitting the sale of a generic version of GOCOVRI beginning in June 2029, or sooner under certain conditions.

APOKYN®

Trokendi XR®

Trokendi XR is indicated for (1) epilepsy: initial monotherapy for the treatment of partial-onset and primary generalized tonic-clonic (PGTC) seizure in patients 6 years of age and older (1.1); adjunctive therapy for the treatment of partial-onset, primary generalized tonic-clonic seizures, or seizures associated with Lennox-Gastaut Syndrome in patients 6 years of age and older (1.2); and for (2) preventive treatment of migraine in patients 12 years of age and older. Trokendi XR is the first once-daily extended-release topiramate product indicated for the treatment of epilepsy and the prophylaxis of migraine headaches in adults and adolescents in the U.S. market.

Oxtellar XR®

ZURZUVAE®

ZURZUVAE® capsules are the first and only FDA approved oral medicine indicated for the treatment of PPD in adults. ZURZUVAE is a neuroactive steroid that is a positive allosteric modulator of GABAA receptors, targeting both synaptic and extrasynaptic GABAA receptors, and is the first oral, once-daily, 14-day treatment specifically indicated for adults with PPD. ZURZUVAE became commercially available in the U.S. in December 2023 as a treatment option for women with PPD. We and our collaboration partner, Biogen MA Inc. (BIMA) and Biogen International GmbH (together with BIMA, Biogen), are jointly commercializing ZURZUVAE in the U.S. under a collaboration agreement (Biogen Collaboration Agreement). The Company and Biogen equally share in all operating profits and losses arising from sales of ZURZUVAE in the U.S., with Biogen recording such product sales. Biogen has the right to commercialize ZURZUVAE outside of the United States, other than in Japan, South Korea, and Taiwan (the Shionogi Territory). In the third quarter of 2025, Biogen received approval for zuranolone for the treatment of PPD by the European Medicines Agency (EMA) and Medicines Healthcare Regulatory Agency (MHRA) in Europe and the United Kingdom (U.K.) respectively. In the fourth quarter of 2025, ZURZUVAE received Health Canada Authorization in Canada for treatment indicated for adults with PPD.

Pursuant to a collaboration agreement with Shionogi for the development of products containing zuranolone in the Shionogi Territory. Shionogi is currently developing a product containing zuranolone for the treatment of patients with major depressive disorder, or MDD, in Japan. No product containing zuranolone is approved for the treatment of MDD in the United States. In the third quarter of 2024, Shionogi reported that it submitted a new drug application, or NDA, in Japan for a product containing zuranolone for the treatment of MDD. In the fourth quarter of 2025, Shionogi received approval from the Pharmaceuticals and Medical Devices Agency for the manufacturing and marketing of a product containing zuranolone in Japan for the treatment of MDD.

ONAPGOTM

ONAPGO (apomorphine hydrochloride) injection is the first and only subcutaneous apomorphine infusion device for the treatment of motor fluctuations in adults with advanced PD. ONAPGO was approved by the FDA in February 2025. ONAPGO was launched in April 2025.

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XADAGO®

XADAGO (safinamide) is a once-daily product indicated as adjunctive treatment to levodopa/carbidopa in patients with PD who are experiencing "OFF" episodes. XADAGO is a monoamine oxidase B (MAO-B) inhibitor that works by blocking the catabolism of dopamine, which is believed to result in an increase in dopamine levels, and therefore a subsequent increase in dopaminergic activity in the brain. XADAGO was approved by the FDA in March 2017.

The Company has entered into settlement agreements with third parties permitting the sale of a generic version of XADAGO beginning in December 2027, or sooner under certain conditions. For more information, refer to Part I, Item I—Business—Intellectual Property and Exclusivity in this Annual Report on Form 10-K.

MYOBLOC®

MYOBLOC (rimabotulinumtoxinB) is a product indicated for the treatment of cervical dystonia to reduce the severity of abnormal head position and neck pain associated with cervical dystonia in adults and treatment of chronic sialorrhea in adults. MYOBLOC is the only Type B toxin available on the market. MYOBLOC injections must be administered by a physician.

MYOBLOC was approved by the FDA in August 2019 for the treatment of chronic sialorrhea in adults and in December 2000 for the treatment of adults with cervical dystonia.

ONAPGOTM

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Research and Development

We are committed to the development of innovative product candidates in neurology and psychiatry, including the following:

We also engage in a variety of research and development efforts including development of a pipeline of novel CNS product candidates for the treatment of various CNS conditions. We have devoted and continue to devote significant resources to research and development activities. We expect to incur significant expenses as we continue developing each of our product candidates through FDA approval or until the program terminates; and expanding product indications for approved products and our intellectual property portfolio. Our expectations regarding our research and development programs are subject to the risks described under Item 1A—Risk Factors—Risks Related to Our Industry and Business.

ONAPGO (formerly SPN-830)

The approval of ONAPGO is based on results from a Phase 3, twelve-week, multicenter, parallel-group, double-blind, randomized, placebo-controlled study (N=107) evaluating the efficacy and safety of ONAPGO. The primary efficacy endpoint was the mean change in total daily "OFF" time assessed from baseline to the end of the twelve-week treatment period based on patient diaries. The key secondary endpoints were the mean change in daily GOOD ON time, which was defined as ON time without troublesome dyskinesia, and Patient Global Impression of Change (PGIC).

During the Phase 3 study, ONAPGO significantly reduced the amount of daily "OFF" time at twelve weeks from baseline (p=0.0114), with ONAPGO-treated patients (n=53) experiencing a 2.6-hour reduction compared to placebo (n=51) with 0.9 hours. The reduction in daily "OFF" time was accompanied by a similar significant increase in daily GOOD ON time (2.8 hours for ONAPGO-treated patients compared to 1.1 hours for the placebo group; p=0.0188). In addition, numerically greater improvements in daily "OFF" time and daily GOOD ON time were seen as early as the first week of treatment and were maintained throughout all measured timepoints. Additionally, ONAPGO-treated patients more frequently reported improvement in their state of general health compared with placebo-treated patients (PGIC: 79% vs. 24%; p<0.0001). The most common adverse events (≥10% incidence) were infusion-site nodule, nausea, somnolence, infusion-site erythema, dyskinesia, headache, and insomnia.

SPN-817 (huperzine A)

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models to be effective for the treatment of partial seizures and Dravet Syndrome. SPN-817 ~~has~~is ~~received~~in ~~Orphan~~clinical ~~Drug Designation for both Dravet Syndrome and Lennox-Gastaut Syndrome from the FDA~~development.

We are focused on completing and optimizing the synthesis process of the synthetic drug as well as developing a novel dosage form. Given the potency of SPN-817 (huperzine A), a novel extended-release oral dosage form is critical to the success of this program because initial studies with the immediate-release formulations of non-synthetic SPN-817 (huperzine A) have shown serious dose-limiting, side effects.

We are conducting an open-label Phase 2a clinical study of SPN-817 in patients with treatment-resistant seizures. The first part of this study (Stage A) has completed dosing in the titration and maintenance periods. We have completed enrollment of Stage A and announced in November 2024 the topline data from all subjects with focal seizures who received the 3mg and 4mg twice daily doses, completed the maintenance period (n=10), and enrolled in the post-maintenance extension period (n=6).

•Maintenance period:

◦56% median seizure reduction from baseline.

◦70% of subjects had 30% or more seizure reduction.

◦60% of subjects had 50% or more seizure reduction.

◦30% of subjects had 75% or more seizure reduction.

•Post-maintenance extension period:

◦66% median seizure reduction from baseline.

◦83% of subjects had 30% or more seizure reduction.

◦67% of subjects had 50% or more seizure reduction.

◦50% of subjects had 75% or more seizure reduction.

•Seizure Freedom:

◦Maintenance period: 1 out of 10 subjects (10%) who completed a post-baseline seizure diary had at least one four-week seizure free period.

◦Post-maintenance extension period: 1 out of 6 subjects (17%) had at least one four-week seizure free period.

Assessment by EpiTrack®, a validated cognitive screening tool designed for patients with epilepsy, indicated that 75% of 16 subjects was equally split between those who improved and those who had no change in cognitive function. SPN-817 was safe and had acceptable tolerability with 2 subjects discontinuing because of treatment related adverse events out of the 26 subjects who entered the maintenance period. The second part of this study (Stage B) is on-going and includes the use of a concomitant anti-emetic to reduce the cholinergic adverse events observed in the study.

We initiated a Phase 2b randomized, double-blind, placebo-controlled study of 3mg and 4mg twice daily doses in approximately 258 adult patients with treatment resistant focal seizures.

SPN-820 (NV-5138)

SPN-820 is a novel, first- in- class, ~~orally~~intracellular ~~active~~enhancer ~~small~~of ~~molecule that activates the brain~~ mechanistic target of rapamycin complex 1 (mTORC1), signaling. Depression is associated with synapse loss and reduced synaptic plasticity in key brain regions including the prefrontal cortex and increasing mTORC1-mediated synaptic plasticity is a ~~gatekeeper~~potential ofavenue ~~cellular~~to ~~metabolism~~treat depression and ~~renewal~~associated symptoms. SPN-820 selectively binds to intracellular sestrin proteins and ~~modulates~~subsequently ~~sestrin~~engages a cascade of multi-protein complexes, ~~which~~enhancing ~~senses~~mTORC1 ~~amino~~signaling. ~~acid~~The ~~availability~~intracellular inmechanism and the ~~brain,~~lack of binding to cell surface receptors suggests the potential for a ~~potent~~differentiated ~~natural~~safety ~~activator~~profile ofand ~~mTORC1~~is unlikely to have abuse potential.

~~Depression~~In isFebruary ~~associated~~2025, ~~with synapse loss and reduced synaptic plasticity in key brain regions including~~ the ~~prefrontal~~Company ~~cortex~~reported ~~and~~topline ~~increasing~~results ~~mTORC1-mediated~~from ~~synaptic plasticity is~~ a ~~promising~~randomized ~~avenue to treat depression and associated symptoms. SPN~~double-~~820~~blind ~~selectively binds to intracellular sestrin proteins and subsequently engages a cascade of multi~~placebo-~~protein~~controlled ~~complexes,~~Phase ~~enhancing~~2b ~~mTORC1~~study ~~signaling. A single administration~~ of SPN-820 ~~rapidly~~in ~~(on~~adults ~~within~~with ~~one~~treatment-resistant ~~hour)~~depression ~~and transiently~~ (~~off within seven hours~~TRD) ~~enhances~~following ~~intracellular~~four ~~mTORC1~~weeks ~~signaling in the prefrontal cortex~~ of ~~animals,~~chronic ~~restores~~daily ~~levels~~dosing. ofThe ~~synaptic~~study ~~proteins,~~did ~~reducing~~not ~~depressive-like~~demonstrate ~~behaviors in~~ a ~~brain-derived~~statistically ~~neurotrophic~~significant ~~factor~~improvement ~~"BDNF"-dependent~~on ~~manner.~~the ~~The~~primary ~~rapid~~ and ~~transient~~secondary ~~enhancement of mTORC1 signaling in the prefrontal cortex is required for anti-depressant effects in preclinical animal models~~endpoints. The ~~intracellular~~safety ~~mechanism~~profile of SPN-820, ~~and~~was ~~the~~consistent ~~lack~~with ofprevious ~~binding~~clinical ~~to cell surface receptors~~trials, ~~suggests~~showing ~~the~~few ~~potential~~adverse ~~for a differentiated safety profile~~events.

AThe Company initiated a follow-on Phase 12b multi-center, randomized, double-blind, placebo-controlled trial ~~demonstrated~~in ~~early~~approximately ~~proof~~200 ofadults ~~concept~~with inMDD. ~~which~~The astudy ~~single~~will ~~dose~~examine the safety and tolerability of SPN-820 ~~showed~~2400 amg given intermittently (twice weekly) as an adjunctive treatment to the current baseline antidepressant therapy, as well as assess the rapid ~~and~~onset ~~sustained~~of improvement in ~~core~~depressive symptoms. For drugs that work through the mTROC1 pathway, ~~with~~emerging ~~favorable~~data ~~safety~~indicate ~~and~~that ~~tolerability~~chronic indaily ~~patients~~dosing ~~with~~may ~~treatment~~actively ~~resistant~~suppress ~~depression.~~sustained Weneuroplasticity ~~believe~~and antidepressant benefits. Accordingly, the ~~novel~~follow-on ~~mechanism~~Phase of2b ~~action~~study ~~(MOA)~~will inutilize ~~depression~~intermittent ~~may~~dosing ~~improve~~consistent ~~symptoms~~with ofwhat ~~depression~~was used in ~~patients~~a ~~who~~Phase ~~have~~2a ~~failed~~open ~~other~~label study that showed a potential clinical effect of SPN-820.

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agents.

We completed a Phase 2a multi-center open label study in 40 subjects with Major Depressive Disorder (MDD) in the fourth quarter of 2024. The data were based on 40 enrolled subjects, of which 38 completed the ten-day treatment period. The primary objective of the study was to assess efficacy in MDD, as well as the onset of efficacy. The Phase 2a study demonstrated rapid and substantial decrease in depressive symptoms, and 80% decrease in suicidal ideation. SPN-820 was well-tolerated during the study with few adverse events reported by the subjects. In addition, the data demonstrated a rapid Montgomery–Asberg Depression Rating Scale (MADRS) response rate (≥50% reduction) and remission (MADRS ≤10), reaching 50.0% and 35.0% of subjects, respectively, at 4 hours, with additional improvement to 84.2% and 63.2% of participants by Day 10.

In February 2025, we reported topline results from the Phase 2b study of SPN-820. The Phase 2b study of SPN-820 in adults with treatment-resistant depression did not demonstrate a statistically significant improvement on the primary endpoint of change from baseline in the MADRS total score to Week 4 (SPN-820 [LS mean ± Standard Error]: -12.3 ± 0.96 vs. placebo: -11.9 ± 0.96; p = not significant). There was no treatment difference between SPN-820 and placebo in the change from baseline to Week 4 for the secondary endpoints. The safety profile of SPN-820 was consistent with previous clinical trials, showing few adverse events.

The Phase 2b study was a multi-center randomized double-blind placebo-controlled trial of SPN-820 in adults with treatment-resistant depression. The study examined the efficacy and safety of SPN-820 over a course of four weeks of treatment and then a week of blinded placebo-washout in approximately 250 patients from approximately 40 clinical sites. The primary outcome measure was the change from baseline to end of treatment period on the MADRS Total Score.

SPN-443 – Novel stimulant for the treatment of ADHD/CNS

WeThe Company completed a Phase 1 single dose study in healthy adults in 2024 following submission of an Investigational New Drug Application. The study was a first in human, pilot pharmacokinetic study of two oral formulations of SPN-443 in healthy adults. The primary objective of the study was to assess ~~the~~ safety and tolerability. This molecule, along with its major metabolites, is an inhibitor of norepinephrine, dopamine and serotonin, also known as a triple reuptake inhibitor. Both formulations of SPN-443 showed adequate bioavailability and were well tolerated. The Company has selected ADHD as the lead indication for SPN-443 and plans to initiate single-ascending dose (SAD) and multiple-ascending dose (MAD) studies in the second half of 2026.

Zuranolone

The Company has granted Biogen sole rights to develop and commercialize zuranolone outside the U.S., other than in Japan, Taiwan and South Korea where it has granted those rights to Shionogi & Co., Ltd. (Shionogi). Shionogi is currently developing zuranolone for the treatment of patients with MDD in Japan, and in the third quarter of 2024, Shionogi reported that it submitted a new drug application (NDA) in Japan for zuranolone for the treatment of MDD. No product containing zuranolone is approved for the treatment of MDD in the United States. In the third quarter of 2025, Biogen received approval for zuranolone for the treatment of PPD by the European Medicines Agency (EMA) and Medicines Healthcare Regulatory Agency (MHRA) in Europe and the United Kingdom (U.K.) respectively. In the fourth quarter of 2025, Biogen received Health Canada Authorization for zuranolone for the treatment of PPD in Canada. In the fourth quarter of 2025, Shionogi received approval for a product containing zuranolone for the treatment of MDD by the Pharmaceuticals and Medical Devices Agency in Japan.

Sales and Marketing

We market our key products through our own sales forces in the U.S. and seek strategic collaborations with other pharmaceutical companies to commercialize our products outside of the U.S. We have a commercial sales and marketing organization in the U.S. to support sales of our commercial products. We believe our current sales forces in the U.S. are effectively targeting healthcare providers to support and grow our key commercial products.

One sales force focuses on ~~serving~~ movement disorder specialists and other specialized health care providers in the U.S. in the Parkinson's area.

~~The~~Another ~~second~~ sales force focuses on ~~serving~~ psychiatrists, pediatricians, primary care physicians, and ~~other~~advanced ~~health~~practice ~~professionals~~providers in the ADHD area.

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A third sales force focuses on psychiatrists, obstetricians-gynecologists, and other health professionals in the postpartum depression area.

Customers

The majority of our product sales are to pharmaceutical wholesalers, specialty pharmacies, and distributors who, in turn, sell our products to pharmacies, hospitals, and other customers, including federal and state entities. The majority of sales of Qelbree, Oxtellar XR, Trokendi XR, and XADAGO are made to wholesalers and distributors. In addition, MYOBLOC is available for direct purchase by physicians and hospitals. The majority of sales of GOCOVRI, APOKYN, ONAPGO, and ~~APOKYN~~ZURZUVAE, are made to specialty pharmacies.

Each of our three major customers, Cencora, Inc., Cardinal Health, Inc., and McKesson Corporation, individually accounted for more than 2015% of our total product revenue in ~~2024~~2025 and collectively accounted for more than 7776% of our total product revenue in ~~2024~~2025.

Market and Competition

We are engaged in segments of the pharmaceutical industry that are highly competitive and rapidly changing. Many large pharmaceutical and biotechnology companies, academic institutions, governmental agencies, and other public and private research organizations are commercializing or pursuing the development of products for the same molecule, compound, or diseases that we are currently pursuing or may target in the future.

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research organizations are commercializing or pursuing the development of products for the same molecule, compound, or diseases that we are currently pursuing or may target in the future.

ADHD

ADHD is a CNS disorder characterized by developmentally inappropriate levels of inattention, hyperactivity, and impulsivity. ADHD affects an estimated 6% to 9% of all school-age children, and an estimated 3% to 5% of adults in the U.S. An estimated 50% of children with ADHD continue to meet the criteria for ADHD into adolescence. Diagnosis of ADHD requires a comprehensive clinical evaluation based on identifying patients who exhibit the core symptoms of inattention, hyperactivity, and impulsivity. Although many patients may be inattentive, hyperactive, or impulsive, the level of severity and degree of functional impairment, and considerations as to what may be behind the underlying symptoms determine which patients meet the diagnosis and therefore should be treated for ADHD.

Competition in the U.S. ADHD market has increased with the commercial launch of several branded products in recent years, as well as the launch of generic versions of branded drugs, such as Adderall XR, Concerta, and Vyvanse, all of which are stimulants, and Intuniv, Kapvay and Strattera, all of which are non-stimulants. We expect competition in this market to increase as new products are developed. For example, in the fourth quarter of 2025, an NDA was filed with the FDA for centanafadine for the treatment of ADHD and was accepted for priority review in Q1 2026. Treatment options for ADHD in the U.S. market can be broadly classified as either stimulant or as non-stimulant products.

Our product, Qelbree, is a novel nonstimulant taken once-daily for full-day exposure. Efficacy and symptom improvement was observed early in treatment in clinical studies. Also, it has a proven safety and tolerability profile, with no evidence of abuse potential in clinical studies. Qelbree was the first novel nonstimulant treatment for ADHD approved by the FDA since 2011.

Parkinson's Disease

Parkinson's Disease is a progressive neurological disorder that is characterized by a loss of dopamine producing neurons in certain regions of the brain, causing symptoms like tremor, slowness of movement, stiffness, loss of balance, and lack of coordination. PD is the second most common progressive neurodegenerative disorder, affecting 1-2% of individuals 65 years and older. Patients with PD can also be affected with psychological symptoms such as anxiety, depression, aggression, and problems with cognition and memory. As the disease progresses, some patients may lose the ability to independently perform the tasks of daily living.

The most commonly prescribed medicine for PD is levodopa. PD patients are frequently prescribed levodopa to help replace dopamine, which is reduced in the brain. However, motor disabilities as a result of levodopa wearing off remain a significant problem for over half of PD patients. Patients in an "OFF" state, including those whose last dose of oral levodopa has worn off and whose next oral dose has not yet begun to take effect, can suffer from reduced coordination or mobility for several hours per day. Carbidopa may be used along with levodopa to improve its efficacy and reduce the amount of levodopa needed to control PD symptoms. There are a number of alternative adjunctive treatment options (FDA-approved and in clinical ~~development) for Parkinson's patients, including various levodopa preparations, dopamine agonists, MAO-B inhibitors, and others.~~

APOKYN is given as needed as an adjunct to levodopa/carbidopa therapy in PD patients who experience "OFF" episodes. In well-controlled clinical studies, APOKYN injections were effective in treating "OFF" periods, as measured by the motor function subset of the Unified Parkinson's Disease Rating Scale (UPDRS). APOKYN, delivered via an injection pen, is for patients for whom oral levodopa will not sufficiently control "OFF" periods. Patients taking APOKYN saw 95% of "OFF" episodes reversed, with improvement beginning as quickly as 10 minutes post-dosing in clinical studies. With the alternative of immobility and limited function, we believe the rapid and reliable reduction of "OFF" episode symptoms is of utmost importance to patients. APOKYN competes with pro re nata therapies such as Inbrija, and other adjunctive therapies, including NOURIANZ. APOKYN also competes with other products for the treatment of PD, both branded such as VYALEV, and generic, including levodopa products.9

~~For~~Table ~~patients who experience significant "OFF" time each day, the Company has developed ONAPGO, formerly known as SPN-830, the first and only subcutaneous apomorphine infusion device for the treatment~~ of motor fluctuations in adults with advanced PD. The infusion may reduce the variability in motor symptoms of PD and offer improved tolerability versus the acute injection route. The FDA approved ONAPGO in February 2025, and the Company will launch ONAPGO in the second quarter of 2025. ONAPGO competes with VYALEV, and with other products for the treatment of PD, both branded and generic, including levodopa products.Contents

~~For~~development) ~~patients~~for ~~not~~Parkinson's ~~ready~~patients, toincluding ~~try~~various ~~parenteral~~levodopa ~~therapy~~preparations, ~~oral~~dopamine agonists, MAO-B inhibitors, ~~such~~and ~~as XADAGO, may provide a decrease in "OFF" time of up to one hour per day when combined with appropriate levodopa therapy~~others. ~~In the XADAGO clinical trials, patients~~

For patients who experience significant "OFF" time each day, the Company has developed ONAPGO, formerly known as SPN-830, the first and only subcutaneous apomorphine infusion device for the treatment of motor fluctuations in adults with advanced PD. The infusion may reduce the variability in motor symptoms of PD and offer improved tolerability versus the acute injection route. The FDA approved ONAPGO in February 2025, and the Company launched ONAPGO in the second quarter of 2025. ONAPGO competes with VYALEV, and with other products for the treatment of PD, both branded and generic, including levodopa products.

For patients not ready to try parenteral therapy, oral MAO-B inhibitors, such as XADAGO, may provide a decrease in "OFF" time of up to one hour per day when combined with appropriate levodopa therapy. In the XADAGO clinical trials, patients experienced more beneficial "on" time, a time when Parkinson's symptoms are reduced, without troublesome uncontrolled involuntary movement (dyskinesia), compared to those receiving a placebo. The increase in "on" time was accompanied by a reduction in "OFF" time and better scores on a measure of motor function assessed during "on" time than before treatment. XADAGO competes with other MAO-B inhibitors used to treat "OFF" episodes in PD, including rasagiline (AZILECT) and selegiline (Zelapar and EMSAM). XADAGO also competes with other products for the treatment of PD, both branded and generic, including levodopa products.

GOCOVRI (amantadine) extended-release capsules are the first and only FDA-approved medicine indicated for the treatment of dyskinesia in patients with PD receiving levodopa-based therapy, with or without concomitant dopaminergic medications, and as an adjunctive treatment to levodopa/carbidopa in patients with PD experiencing "OFF" episodes. It is also the only medicine clinically proven to reduce both dyskinesia and “OFF” periods. GOCOVRI, taken once daily at bedtime, provides an initial lag and a slow rise in amantadine concentration during the night, resulting in a high concentration from the morning and throughout the waking day. Additionally, in the clinical trials, the adjunctive use of GOCOVRI did not require changes to dopaminergic therapies.

Postpartum Depression

Postpartum depression symptoms are some of the most common medical complications during and after pregnancy, and PPD is characterized by depressive symptoms that can begin during pregnancy or within the first four weeks to twelve months following childbirth. PPD symptoms may include sadness and depressed mood; anxiety or agitation; loss of interest in daily activities; changes in eating and sleeping habits; feeling overwhelmed; fatigue and decreased energy; inability to concentrate; hypervigilance about the baby or lack of interest in the baby; and feelings of worthlessness, shame or guilt.

ZURZUVAE is a neuroactive steroid that is a positive allosteric modulator of GABAA receptors, targeting both synaptic and extrasynaptic GABAA receptors, and is the first oral, once-daily, 14-day treatment specifically indicated for adults with PPD. ZURZUVAE became commercially available in the U.S. for women with PPD in December 2023. We and our collaboration partner, Biogen, are jointly commercializing ZURZUVAE in the U.S. under the Biogen Collaboration Agreement. We and Biogen equally share in all operating profits and losses arising from sales of ZURZUVAE in the U.S., with Biogen recording such product sales. ZURZUVAE received a Schedule IV classification from the Drug Enforcement Administration, or DEA. The approval of ZURZUVAE to treat PPD in adults was based on two pivotal clinical trials in adult women with PPD. ZURZUVAE includes a boxed warning that instructs healthcare professionals to advise patients that ZURZUVAE causes driving impairment due to central nervous system depressant effects, and that people who take ZURZUVAE should not drive a motor vehicle or engage in other potentially hazardous activities requiring complete mental alertness until at least 12 hours after ZURZUVAE administration for the duration of the 14-day treatment course. ZURZUVAE can cause CNS depressant effects. The most common side effects of ZURZUVAE include sleepiness or drowsiness, dizziness, common cold, diarrhea, feeling tired, weak, or having no energy, and urinary tract infection.

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~~experienced~~ZURZUVAE ~~more~~currently ~~beneficial~~competes ~~"on"~~with ~~time,~~the acurrent ~~time~~standard ~~when~~of ~~Parkinson's~~care ~~symptoms~~for ~~are reduced~~PPD, ~~without~~which ~~troublesome~~commonly ~~uncontrolled~~consists ~~involuntary~~of ~~movement~~psychotherapy; ~~(dyskinesia)~~however, ~~compared~~patients towith ~~those~~moderate ~~receiving~~or asevere ~~placebo.~~PPD ~~The~~are ~~increase~~often inprescribed ~~"on"~~antidepressant ~~time~~medications ~~was~~such ~~accompanied~~as bySSRIs aand ~~reduction~~SNRIs. inZURZUVAE ~~"OFF"~~may ~~time~~also ~~and~~face ~~better~~competition ~~scores~~from ondrugs acurrently ~~measure~~in ofdevelopment, ~~motor~~if ~~function~~successfully ~~assessed~~developed ~~during~~and ~~"on"~~approved ~~time~~in ~~than~~the ~~before~~future for the treatment. ~~XADAGO~~of ~~competes~~PPD, ~~with~~including ~~other~~potentially ~~MAO-B~~LPCN ~~inhibitors~~1154, ~~used~~an tooral ~~treat~~formulation ~~"OFF"~~of ~~episodes~~the inneuroactive PDsteroid brexanolone under development by Lipocine, ~~including~~Inc. ~~rasagiline~~under the streamlined 505(~~AZILECT~~b)(2) ~~and~~regulatory ~~selegiline~~pathway, ~~(Zelapar~~which ~~and~~allows ~~EMSAM).~~for ~~XADAGO~~approval ~~also~~of ~~competes~~an ~~with~~abbreviated ~~other~~NDA ~~products~~by ~~for~~ the ~~treatment~~FDA, ofand PDBRII-296, ~~both~~an ~~branded~~intramuscular ~~and~~formulation ~~generic~~of brexanolone being developed by Brii Biosciences, ~~including~~and ~~levodopa~~RE104 ~~products.~~which is being developed by Reunion Neuroscience.

GOCOVRI (amantadine) extended-release capsules is the first and only FDA-approved medicine indicated for the treatment of dyskinesia in patients with PD receiving levodopa-based therapy, with or without concomitant dopaminergic medications, and as an adjunctive treatment to levodopa/carbidopa in patients with PD experiencing "OFF" episodes. It is also the only medicine clinically proven to reduce both dyskinesia and “OFF” periods. GOCOVRI, taken once daily at bedtime, provides an initial lag and a slow rise in amantadine concentration during the night, resulting in a high concentration from the morning and throughout the waking day. Additionally, in the clinical trials, the adjunctive use of GOCOVRI did not require changes to dopaminergic therapies.

Epilepsy

Epilepsy is a complex neurological disorder characterized by the spontaneous recurrence of unprovoked seizures, which are sudden surges of electrical activity in the brain that impair a person's mental and/or physical abilities. Adherence with drug treatment regimens is critically important to achieving effective control for patients with epilepsy. Non-adherence with anti-epileptic drug (AED) therapy is a serious issue and remains the most common cause of breakthrough seizures for patients. Not only is taking all prescribed doses critical to control breakthrough seizures, but the timing of when patients take their prescribed doses can also be crucial.

We believe extended-release products, particularly Trokendi XR and Oxtellar XR, may offer important advantages in the treatment of epilepsy. The release profiles of extended-release products can produce more consistent and steadier plasma concentrations as compared to immediate-release products, potentially resulting in fewer side effects, better tolerability, fewer emergency room visits, improved efficacy, and fewer breakthrough seizures. In addition, Trokendi XR's and Oxtellar XR's once-daily dosing is designed to improve patient adherence over the current immediate release products, which must be taken multiple times per day. We believe a once-daily dosing regimen improves adherence, making it more probable that patients take their medication and maintain sufficient levels of medication in their bloodstreams. Extended-release products may help patients improve adherence and, consequently, help patients enjoy a better quality of life.

Trokendi XR competes with all immediate-release and extended-release topiramate products, including Topamax, Qudexy XR, and other generic topiramate products. Oxtellar XR competes with all immediate-release and extended-release oxcarbazepine products, including Trileptal and other generic oxcarbazepine products. Both Oxtellar XR and Trokendi XR compete with other anti-epileptic products, both branded and generic. Many medications are used to treat epilepsy, including topiramate, oxcarbazepine, acetazolamide, brivaracetam, carbamazepine, clobazam, lacosamide, phenytoin, valproic acid, lamotrigine, gabapentin, levetiracetam phenobarbital, and zonisamide.

In addition, when considering treatment regimens for patients with epilepsy, neurologists and epileptologists take into consideration the MOA of the different AEDs that are available. By combining several different MOAs, it is sometimes possible to get significantly better seizure control. We acquired SPN-817, an antiepileptic, which we believe has an MOA different from that of other products and can therefore potentially represent a unique additional treatment alternative.

Migraine

Migraine is a painful, complex neurological disorder consisting of recurring painful attacks that can significantly disrupt time with loved ones, education, and careers. Migraine headaches are often characterized by throbbing pain, extreme sensitivity to light or sound, and potentially, nausea and vomiting. The World Health Organization categorizes migraine as one of the most disabling medical illnesses worldwide. The American Research Foundation categorizes migraine as the third most prevalent illness in the world, and nearly 1 in 4 U.S. households includes someone with migraines. Migraine is estimated to affect over 39 million individuals in the U.S.

As in epilepsy, we believe extended-release products, particularly Trokendi XR, may offer important advantages for the treatment of migraines. Trokendi XR also competes with other products used for the prevention of migraine headaches. Most notably, this includes anti-CGRPs (calcitonin gene related peptide), which is a class of products first introduced in 2018; Botox; beta-blockers; valproic acid; and amitriptyline.

Cervical Dystonia

Cervical dystonia, also known as spasmodic torticollis, is a condition characterized by involuntary muscle contractions in the neck, which cause the head to twist uncontrollably into an abnormal, often painful position. It is a rare disorder, most often presenting in middle age, whose symptoms begin gradually, worsen, and then plateau over a period of months. Estimates of the prevalence of cervical dystonia vary considerably, from 20 to 4,100 per million individuals. Injections of botulinum toxin into affected neck muscles can create temporary relief from symptoms.

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In well-controlled studies, botulinum toxins like MYOBLOC have been shown to improve symptoms as measured on the Toronto Western Spasmodic Torticollis Rating Scale, including pain. Based on clinical studies, MYOBLOC injections offer patients struggling with painful cervical dystonia symptoms relief as early as two weeks after injection, with the duration of effect between 12-16 weeks.

MYOBLOC is the only available botulinum toxin B, whereas other available toxins are type A. MYOBLOC competes with type A toxins such as Botox, Dysport, and Xeomin. MYOBLOC also competes with oral agents used to treat cervical dystonia, including generic baclofen, anticholinergics, benzodiazepines, and tetrabenazine.

Sialorrhea

Sialorrhea can occur in conjunction with several neurologic disorders, such as amyotrophic lateral sclerosis (ALS), cerebral palsy (CP), PD, or as a side effect of some medications. It is characterized by overactive salivary glands. In adults, PD is the most common cause of sialorrhea, with 70%–80% of PD patients experiencing symptoms. In 30%–80% of schizophrenic patients taking clozapine, sialorrhea is evident. In addition to being embarrassing, complications of sialorrhea include aspiration, infection, skin breakdown, and bad odor.

MYOBLOC competes with Xeomin (incobotulinumtoxinA) for the treatment of sialorrhea in adults. Other pharmacologic treatments used to treat sialorrhea include generic glycopyrrolate tablets as well as behavior modification.

Manufacturing

We currently depend on third-party ~~commercial~~contract manufacturing organizations (CMOs) for all manufacturing operations, including the production of raw materials, dosage form product, and product packaging. This encompasses products for commercial use, as well as some products for preclinical and clinical research. We do not own or operate manufacturing facilities for the production of any of our product candidates beyond that used in Phase 2 clinical trials, nor do we have plans to develop our own manufacturing operations in the foreseeable future to support Phase 3 clinical trials or commercial production. We currently employ internal resources to manage our manufacturing contractors.

We have agreements with CMOs headquartered in North America, including: Patheon Pharmaceuticals, Inc. (a subsidiary of Thermo Fisher Scientific Inc.), Packaging Coordinators, Inc., Aphena Pharma Solutions, and Catalent Pharma Solutions, Europe, and Asia for the manufacturing and packaging of some of our commercial products, including those of our subsidiaries, as well as for our pipeline product candidates. For Qelbree, Trokendi XR, GOCOVRI, ~~and~~ Oxtellar XR, and ZURZUVAE, we currently rely on third-party CMOs for the manufacturing and packaging of final commercial products. We rely on third-party CMOs in Asia for the manufacturing of bulk drug substance for Trokendi XR and Oxtellar XR and rely on a third-party CMO in Europe for the raw materials and manufacturing of Qelbree, and GOCOVRI. With respect to ZURZUVAE, we source raw materials from Asia and manufacture ZURZUVAE in Europe. With respect to GOCOVRI and Qelbree, we have an additional manufacturer of bulk drug substance. These CMOs offer a comprehensive range of contract manufacturing and packaging services.

We purchase APOKYN, ONAPGO, MYOBLOC, and XADAGO, as finished goods. APOKYN is manufactured and packaged in Europe for the U.S. market and is supplied to us by our licensing partner, Britannia. ONAPGO is manufactured in Europe, supplied to us by Britannia, and packaged in the U.S.. Britannia (a subsidiary of Stada Arzneimittel AG) also supplies injectable apomorphine to the European market under the brand name Apo-go. MYOBLOC is manufactured and packaged in Europe by Merz GmbH & Co. KGaA (Merz). ~~Under~~In October 2021, we entered into an amendment to the Merz Agreement which increased the price of the annual purchase commitment of MYOBLOC from €3.0 million to approximately €3.9 million. An amendment to the contract manufacturing agreement with Merz ~~for~~was executed in July 2025. Amendments to the ~~manufacture~~contract ~~and~~manufacturing ~~supply~~agreement ofincluded ~~MYOBLOC~~among other things, the ~~Company~~removal ~~has~~of anthe annual minimum purchase requirement of MYOBLOC, ~~amounting~~and the Company's agreement to anpay ~~estimated~~a nonrefundable annual fee of €3.9 0 million to cover general maintenance and reservation costs for the manufacturing facilities. For further discussion on the embedded operating lease related to the Merz Agreement, refer to Note 13, Leases in the Notes to the Consolidated Financial Statements in Part II, Item 8 of this report. XADAGO is manufactured and packaged in Europe by Zambon S.p.A. (Zambon).

Refer to Part I, Item 1A—Risk Factors—If we fail to produce our products and product candidates in the volumes that we require on a timely basis or fail to comply with stringent regulations applicable to pharmaceutical drug manufacturers, we may face delays in the development and commercialization of our products and product candidates or be required to withdraw our products from the market for risks associated with manufacturing and supply of our products and product candidates.

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Our Proprietary Technology Platforms

We have a successful track record of developing and launching novel products by applying proprietary formulation technologies to known drugs to improve their side effect profile or improve patient adherence. In addition, we have developed new indications for existing therapies. Our key proprietary technology platforms include: Microtrol, Solutrol, and EnSoTrol. These technologies have been utilized to create novel, customized product profiles designed to enhance efficacy, reduce the frequency of dosing to improve patient adherence and improve tolerability. Our technologies have been used to create ~~ten~~eleven commercial products, including our products: Qelbree, Trokendi XR, ~~and~~ Oxtellar XR, and ONAPGO; Adderall XR (developed for Shire, which has been acquired by Takeda Pharmaceutical Company); Intuniv (developed for Shire); Mydayis (developed for Shire); Orenitram (developed for United Therapeutics Corporation); and Namzaric (developed for Allergan plc).

We are also engaged in generating and assessing New Chemical Entities (NCEs). These NCEs are generated by leveraging our expertise in structure function relationships in active molecules and medicinal chemistry. Our NCEs are being assessed in preclinical pharmacology models for CNS activity and are advancing towards Investigational New Drug application (IND) enabling toxicology studies to support potential future clinical investigation.

Intellectual Property and Exclusivity

Overview

We, including our subsidiaries, continue to build our intellectual property portfolio to provide protection for our technologies, products, and product candidates. We, including our subsidiaries, seek patent protection, where appropriate, both in the U.S. and internationally for products and product candidates.

Our policy is to protect our innovations and proprietary products, and that of our subsidiaries, by, among other things, filing patent applications in the U.S. and abroad, including Europe, Canada, and other countries when appropriate. We, including our subsidiaries, also rely on trade secrets, know-how, proprietary knowledge, continuing technological innovation, and in-licensing opportunities to develop and maintain our proprietary position. Neither we, nor our subsidiaries can be sure that patents will be granted with respect to our pending patent applications or with respect to any patent applications filed by us, or any of our subsidiaries in the future, nor can we be sure that any of our existing patents or any patents that may be granted to us, or any of our subsidiaries in the future will be commercially useful in protecting our technology, our products, or those of our subsidiaries. Neither we, nor any of our subsidiaries can be sure that any patents, if granted, will sustain a legal challenge.

Patent Portfolio

Our commercial products, including those of our subsidiaries, covered by active patents include Trokendi XR, Oxtellar XR, Qelbree, GOCOVRI, Osmolex ER, XADAGO, and ~~XADAGO~~ZURZUVAE. We, or our subsidiaries, own all the issued patents for Trokendi XR, Oxtellar XR, Qelbree, GOCOVRI, Osmolex ER, and ZURZUVAE, as well as the pending U.S. patent applications for Qelbree ~~and GOCOVRI~~. We have a license from Zambon for the U.S. patents that cover XADAGO.

The Company has ongoing patent litigation concerning ~~Trokendi XR~~Qelbree. For more information, refer to Part I, Item 3—Legal Proceedings in this Annual Report on Form 10-K.

~~Qelbree~~QELBREE

We have three families of pending U.S. non-provisional and foreign counterpart patent applications for Qelbree. Patents, if issued, could expire from 2029 to 2035. We have patents issued in the U.S., Canada, and certain countries in Europe covering a method of treating ADHD using viloxazine hydrochloride. In a second family, covering the novel synthesis process of the active ingredient, we have patents issued in the U.S. as well as in certain foreign countries. In a third family, we have four patents issued in the U.S. covering modified release formulations of viloxazine hydrochloride, three of which cover Qelbree. We also have patents issued in certain foreign countries. We own all the issued patents and the pending patent applications.

GOCOVRI

~~The~~There ~~patent~~are ~~portfolio~~13 ~~covering GOCOVRI includes 19~~ U.S. patents. Wethat ~~have~~cover ~~additional pending applications containing method and composition claims relating to the pharmacokinetic profile and dosing, and formulations of amantadine extended release~~GOCOVRI. The issued patents expire ~~through~~from 2028 to 2038. These patents ~~and patent applications~~ are owned by Adamas Operations and, as of the first quarter of 2022, are licensed to Supernus Pharmaceuticals, Inc.

Prior to our acquisition of Adamas, Adamas entered into settlement agreements with third parties, permitting the sale of a generic version of GOCOVRI (amantadine) extended-release capsules (including for any new indications approved under the GOCOVRI NDA) on or after June 4, 2029.

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~~Prior~~OXTELLAR to our acquisition of Adamas, Adamas entered into settlement agreements with third parties, permitting the sale of a generic version of GOCOVRI (amantadine) extended-release capsules (including for any new indications approved under the GOCOVRI NDA) on or after June 4, 2029.XR

There are 11 U.S. patents that cover Oxtellar XR. These patents will expire no earlier than 2027. We own all the issued patents and the pending U.S. patent applications. We also own additional foreign patents for extended-release oxcarbazepine.

Our extended-release oxcarbazepine patent portfolio currently includes 14 U.S. patents, 11 of which cover Oxtellar XR. The 11 issued U.S. patents covering Oxtellar XR will expire no earlier than 2027. We own all of the issued patents and the pending U.S. patent applications. We also own additional foreign patents for extended-release oxcarbazepine.

The Company entered into settlement and license agreements with third parties, permitting the sale of a generic version of Oxtellar XR beginning in September 2024.

~~Trokendi~~TROKENDI XR

WeThere ~~currently~~are ~~have~~ 10 U.S. patents that cover Trokendi XR. We own all the issued patents. We also own additional foreign patents for extended-release topiramate. The ten issued U.S. patents covering Trokendi XR will expire no earlier than 2027.

The Company has entered into settlement agreements with third parties, permitting the sale of a generic version of Trokendi XR beginning in January 2023 and entitling the Company to receive royalties on those sales.

XADAGO

~~The~~There ~~patent~~are ~~portfolio covering XADAGO has~~ 3 U.S. patents ~~licensed~~covering ~~from Zambon~~XADAGO. These patents were licensed from Zambon and will expire from 2027 to 2031.

The Company has entered into settlement agreements with third parties, permitting the sale of a generic version of XADAGO beginning in December 2027, or earlier under certain circumstances.

ONAPGO

In February 2025, ONAPGO ~~received~~was ~~Orphan~~approved ~~Drug~~by ~~Designation in~~ the ~~U.S. from the~~ FDA., ~~ONAPGO~~and ~~received~~was ~~seven~~launched ~~years~~in ofApril U2025.~~S exclusivity from the time of approval by the FDA.~~

ZURZUVAE

There are 5 U.S. patents covering ZURZUVAE. These patents will expire from 2034 to 2037, subject to any patent term extensions. We also have patents issued in Japan and Europe and pending applications in the U.S. and certain other foreign countries. These patents are owned by Sage Therapeutics, LLC, and are licensed to Supernus Pharmaceuticals, Inc.

SPN-817 (huperzine A)

We have ~~one~~two ~~patent~~patents issued in the U.S., and in China, Mexico, and certain other foreign countries relating to extended-release formulations of huperzine. We additionally have pending patent applications in the U.S. and certain foreign countries.

SPN-820 (NV-5138)

Under the terms of the April 2020 Development Agreement with Navitor Pharmaceuticals, Inc. (Navitor Inc.), we have an exclusive option to license or acquire NV-5138 in all world territories, prior to initiation of the Phase 3 clinical program. NV-5138 has multiple patents issued covering composition of matter, various methods of use, etc. in the U.S. and certain other foreign countries. The issued patents have expiration dates of 2036-2038 or beyond. There are additional pending patent applications in the U.S. and certain foreign countries.

Other Intellectual Property Rights

We, including our subsidiaries, seek trademark protection in the U.S. and internationally, where available and when appropriate. We, including our subsidiaries, have filed for trademark protection for several marks, which are used in connection with our pharmaceutical research and development collaborations as well as with our products and those of our subsidiaries. We or our subsidiaries are the owner/licensee of various U.S. federal trademark registrations (®) and registration applications (TM), including the following marks referred to in this Annual Report on Form 10-K, pursuant to applicable U.S. intellectual property laws: "Supernus®", "Microtrol®", "Qelbree®", "GOCOVRI®", "Oxtellar XR®", "APOKYN®", "Trokendi XR®", "XADAGO®", "MYOBLOC®", "Osmolex ER®", "Namzaric®", "ONAPGOTM", "ZURZUVAE®", and the registered Supernus Pharmaceuticals logo.

From time to time, we, including our subsidiaries, may find it necessary or prudent to obtain licenses from third party IP holders. Where licenses are readily available at a reasonable cost, such licenses are considered a normal cost of doing business. In other instances, however, we or our subsidiaries may use the results of freedom-to-operate inquiries and internal analyses to guide

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our early-stage research away from areas where we are likely to encounter obstacles in the form of third party IP. For example, where a third party holds relevant IP and is a direct competitor, a license might not be available on commercially reasonable terms or at all. We, and our subsidiaries, strive to identify potential third party IP issues in the early stages of our research programs in order to minimize the cost and disruption of resolving such issues.

To protect our competitive position and that of our subsidiaries, it may be necessary to enforce our patent rights through litigation against infringing third parties. See Part I, Item 3—Legal Proceedings. Litigation to enforce our own patent rights or those of our subsidiaries is subject to uncertainties that cannot be quantified in advance. In the event of an adverse outcome in litigation, we or our subsidiaries could be prevented from commercializing a product or precluded from using certain aspects of our technology platforms. This could have a material adverse effect on our business or that of our subsidiaries. In addition, litigation involving our patents or those of our subsidiaries carries the risk that one or more of our patents or those of our subsidiaries will be held invalid (in whole or in part; on a claim-by-claim basis) or held unenforceable. Such an adverse court ruling could allow third parties to commercialize products or use technologies that are similar to ours and then compete directly with us, without compensation to us or our subsidiaries. In addition, third parties could allege that our products or those of our subsidiaries infringe their intellectual property rights and pursue legal action against the Company or any of its subsidiaries. See Part I, Item 1A—Risk Factors for risk factors related to intellectual property.

U.S. Patent Application Process

The U.S. patent system permits the filing of provisional and non-provisional patent applications. A non-provisional patent application is submitted to the United States Patent and Trademark Office (USPTO) and can mature into a patent once the USPTO determines that the claimed invention meets the standards for patentability. The term of individual patents depends upon the legal term of the patents in the countries in which they are obtained. In most countries in which we file, the patent term is 20 years from the earliest date of filing a non-provisional patent application. In the U.S., a patent's term may be lengthened via a patent term adjustment (PTA), which compensates a patentee for administrative delays by the USPTO in granting a patent.

A patent’s term can be shortened through a process called a "terminal disclaimer." This process can be undertaken when a patent application is considered too similar to another patent owned by the same applicant. Without this process an applicant could be barred from obtaining a new related patent because it would be deemed to be an obvious variant of an existing patent. By filing a terminal disclaimer, a new patent can be issued at the cost of the applicant acknowledging that the new patent cannot extend beyond the expiration of the original patent. A new patent issued after the filing of a terminal disclaimer cannot be asserted against others unless the owner of the new patent also owns the previously existing patent that was the subject of the terminal disclaimer. Recent legal decisions have shown that filing a terminal disclaimer can reduce any extra time added to a patent’s term due to delays in the patent approval process. Patent applicants typically avoid filing terminal disclaimers when doing so would negatively affect their interests.

In evaluating the patentability of a claimed invention, the filing date of a non-provisional patent application is used by the USPTO to determine what information constitutes prior art. If certain requirements are satisfied, a non-provisional patent application can claim the benefit of the filing date of a previously filed provisional patent application. In such an instance, the filing date accorded to the provisional patent application may supersede information that otherwise could preclude the patentability of an invention.

The term of a patent that covers an FDA-approved drug may also be eligible for patent term extension (PTE). This permits the patent term to be extended as compensation for that portion of a patent term lost during the FDA regulatory review process. The Drug Price Competition and Patent Term Restoration Act of 1984, or the Hatch-Waxman Amendments, permits a PTE of up to five years beyond the expiry date of the patent. The length of the PTE is related to the length of time the drug is under FDA review. However, the patent extension cannot extend the remaining term of a patent beyond a total of 14 years from the date of product approval. Only one patent for an approved drug may be extended. Similar provisions to extend the term of a patent that covers an approved drug are available in Europe and other foreign jurisdictions.

In the future, if any of our product candidates receive FDA or other regulatory approval, we may be able to apply for PTEs on patents covering those products. Depending upon the timing, duration, and specifics of FDA approval and the issuance of a U.S. patent, we may obtain limited patent term restoration.

Collaborations and Licensing Arrangements

We, including our subsidiaries, obtained exclusive licenses from third parties for proprietary rights to support our, and our subsidiaries', commercial products and product candidates. Under these in-licensing agreements, we or our subsidiaries may be required to pay certain amounts upon the achievement of defined milestones. If these products are ultimately commercialized,

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we or the applicable subsidiary are also obligated to pay royalties to third parties, computed as a percentage of net product sales, for each respective product under a license agreement.

We, including our subsidiaries, also have entered into out-licensing agreements to license our intellectual property and technology or that of our subsidiaries to third parties. Under these out-license agreements, we or our subsidiaries may be entitled to receive certain amounts upon the achievement of defined milestones and royalties from third parties, generally computed as a percentage of net product sales, for each respective product under a license agreement.

ZURZUVAE (SAGE-217)

In July 2025, we acquired Sage Therapeutics. Through this acquisition, we obtained a collaboration and licensing agreement with Biogen Inc. for the development, manufacture and commercialization of ZURZUVAE and additional products containing zuranolone, which, along with ZURZUVAE, we refer to as Licensed Zuranolone Products.

Under the Biogen Collaboration Agreement, we and Biogen agreed that we will jointly develop and commercialize the Licensed Zuranolone Products in the U.S., and that Biogen solely will develop and commercialize the Licensed Zuranolone Products in territories outside the U.S. other than Japan, the Republic of Korea, and Taiwan (the Biogen Territory). We and Biogen have agreed to share jointly in the performance of the activities under the Biogen Collaboration Agreement in the U.S. and to share all operating profits and losses for activities under the Biogen Collaboration Agreement solely for the U.S. equally. The Biogen Collaboration Agreement provides that Biogen has sole responsibility and decision-making authority with respect to such activities in the Biogen Territory. Biogen is solely responsible for all costs for activities under the Biogen Collaboration Agreement in the Biogen Territory. We have an Opt-Out Right (as defined below) in the U.S. with respect to the Licensed Zuranolone Products.

We have granted to Biogen a non-transferable, sublicensable, except for certain specified exceptions, license to certain of our intellectual property as needed to perform the activities under the Biogen Collaboration Agreement. Such license is co-exclusive with us in the U.S. and exclusive, even as to us, in the Biogen Territory, subject to certain retained rights to allow us to exercise our rights and perform our obligations under the Agreement and with respect to the Shionogi Territory.

Our activities for the Licensed Zuranolone Products in the U.S. are conducted pursuant to joint plans agreed to by us and Biogen, and overseen by a joint steering committee, or the JSC. The JSC is composed of an equal number of representatives from each of us and Biogen.

For so long as a Licensed Zuranolone Product is being sold in the U.S., we and Biogen will share equally in all operating profits and losses arising from such Licensed Zuranolone Product in the U.S. The Biogen Collaboration Agreement provides that Biogen will record sales of Licensed Zuranolone Products globally. Consistent with this provision, Biogen records sales of ZURZUVAE in the U.S. We have the right to opt out (Opt-Out right) of such profit- and loss-sharing with respect to the Licensed Zuranolone Products in the U.S. If we elect to exercise our Opt-Out Right with respect to the Licensed Zuranolone Products, we have agreed to transition to Biogen applicable development and commercialization activities for such Licensed Zuranolone Products for the U.S., and Biogen has agreed to assume sole operational and financial responsibility for such activities.

The Biogen Collaboration Agreement provides for aggregate regulatory/commercial milestone payments from Biogen to us for Licensed Zuranolone Products.

Biogen has also agreed to pay us tiered royalties based on net sales of the Licensed Zuranolone Products in the Biogen Territory of high-teens to low-twenties percentages. If we have exercised our Opt-Out Right in the U.S. with respect to Licensed Zuranolone Products, Biogen has agreed to pay us specified royalties based on net sales of Licensed Zuranolone Products. Royalty payments may be reduced in certain specified customary circumstances. Due to the uncertainty of pharmaceutical development and the high historical failure rates generally associated with drug development, we may never receive additional milestone payments or any royalty payments from Biogen.

During the term of the Biogen Collaboration Agreement, neither us nor Biogen nor any of our respective affiliates is permitted outside of the Biogen Collaboration Agreement to directly or indirectly develop, manufacture, conduct medical affairs activities or commercialize certain products in specified indications, or enter into agreements or arrangements with third parties to perform any of the above activities.

Unless earlier terminated, the Biogen Collaboration Agreement expires on a Licensed Product-by-Licensed Product and country-by-country basis on the later of (i) in the Biogen Territory, the expiration of the royalty term for such Licensed Product in such country or (ii) in the U.S., until the parties agree to permanently stop commercializing such Licensed Product. Biogen may

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terminate the Biogen Collaboration Agreement for convenience in its entirety or on a Product Class-by-Product Class basis, or as to a region by providing advance written notice. Either us or Biogen may terminate the Biogen Collaboration Agreement (i) in the event of a material breach in whole or in part, by the other party subject to a cure period and (ii) in the event of the insolvency of the other party, in each case subject to specified conditions.

For additional information related to the Biogen Collaboration Agreement, see the Risk Factor captioned The commercial results of ZURZUVAE® (zuranolone) depend, in part, on our ability, with our collaboration partner, Biogen MA Inc., and Biogen International GmbH, or together, Biogen, to successfully continue the commercialization of the product for the treatment of women with postpartum depression, or PPD, in the U.S. There is no assurance that our commercialization efforts in the U.S. with respect to ZURZUVAE for the treatment of women with PPD will be successful or that we will be able to generate revenues at the levels or on the timing we expect or at levels or on the timing necessary to support our goals under Part I, Item 1A, Risk Factors of this Annual Report.

Through the Sage Acquisition, we also obtained a collaboration agreement with Shionogi & Co. Ltd. (Shionogi). Pursuant to this agreement, Shionogi is responsible for all clinical development, regulatory filings and commercialization of products containing zuranolone for the treatment of MDD and potentially other indications in the Shionogi Territory. Shionogi made an upfront payment of $90.0 million in 2018 (prior to our acquisition of Sage), and we will be eligible to receive additional payments of up to $470.0 million if certain regulatory and commercial milestones are achieved by Shionogi.

Under the terms of the agreement, the potential future milestone payments include up to $40.0 million for the achievement of specified regulatory milestones, up to $30.0 million for the achievement of specified commercialization milestones, and up to $385.0 million for the achievement of specified net sales milestones. We will receive tiered royalties on sales of zuranolone in the Shionogi Territory, if development efforts are successful, with tiers averaging in the low to mid-twenty percent range, subject to other terms of the agreement. Due to the uncertainty of pharmaceutical development and the high historical failure rates generally associated with drug development, we may not receive any additional milestone payments or any royalty payments from Shionogi.

Shionogi's exclusive rights to develop and commercialize products containing zuranolone are limited to the Shionogi Territory. The upfront cash payment and any payments for milestones and royalties are non-refundable and non-creditable.

The agreement with Shionogi will terminate on a licensed product-by-licensed product basis on the date on which the royalty term has expired in each country in the Shionogi Territory for such licensed product and will ultimately expire upon the expiration of the last-to-expire royalty term. Shionogi may remove South Korea or Taiwan from the covered territories, for any reason or no reason upon 180 days’ prior written notice. Shionogi may terminate the agreement in its entirety for any reason or no reason upon 180 days’ prior written notice. Shionogi may also terminate the agreement in the event of a serious adverse event or a clinical failure upon 60 days’ written notice to us. Either party may terminate this agreement early in the event of an uncured material breach within 180 days’ after notice is delivered to the other party.

APOKYN and ONAPGO (apomorphine hydrochloride)

In January 2016, we entered into an Amended and Restated Distribution, Development, Commercialization, and Supply Agreement with Britannia that grants us certain intellectual property and product rights in relation to APOKYN, including the right to use and market APOKYN in the United States (Territory). Additionally, under the agreement, Britannia retains certain intellectual property and product rights in relation to APOKYN, including the right to use and market APOKYN in the rest of the world, excluding the United States. Under the Agreement, Britannia has an obligation to supply us with APOKYN for our marketing and sale of the product.

Under the agreement, we are obligated to pay Britannia a royalty based upon U.S. net sales, adjusted for other product related costs for APOKYN, ONAPGO (formerly known as SPN-830), and any other commercial products jointly developed under the agreement. The parties have also agreed to a cost sharing arrangement for the development of new products beyond APOKYN. Under the agreement, we are obligated to pay more than half of the related costs associated with the development of ONAPGO (formerly known as SPN-830) or other new products that are commercialized solely by the Company in the U.S. For costs associated with new products that are commercialized both inside and outside the Territory, we are obligated to pay less than half of the related costs.

We have agreed to use commercially reasonable efforts to develop and commercialize products under the agreement. The initial 15 year term of the agreement is subject to automatic renewal periods unless canceled by either party. Either party may terminate the agreement under certain circumstances, including a material breach of the agreement by the other.

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XADAGO

In February 2016, we entered into a License and Distribution Agreement and a Supply Agreement with Zambon. Under the License and Distribution Agreement, we are the exclusive distributor of XADAGO in the U.S. and we are prohibited from selling or distributing in the U.S. certain ~~product~~products that compete with XADAGO. Also, Zambon is eligible to receive up to $30.0 million in future payments upon the achievement of sales-based milestones, which are based upon specified annual net product sales of XADAGO in the U.S. During the term of the License and Distribution Agreement, we are also obligated to pay a royalty on net product sales of XADAGO in the U.S. In the event that XADAGO annual net sales exceed the specified U.S. annual net product sales thresholds, the royalty percent increases and could go as high as the mid-teens.

Under the Supply Agreement, we must purchase from Zambon and Zambon must provide to us all XADAGO finished products for the U.S. market.

We have agreed to use commercially reasonable efforts to develop and commercialize XADAGO under the agreement. Either party may terminate the agreement under certain circumstances, including a material breach of the agreement by the other.

MYOBLOC

In May 2004, we entered into an asset purchase agreement with a third party resulting in us owning the worldwide rights to MYOBLOC in exchange for us paying a low double-digit royalty based on U.S. annual net sales of MYOBLOC. We make royalty payments to Elan Pharmaceuticals, LLC, a subsidiary of Perrigo Pharma International DAC. While we currently have no intention of seeking approval in the U.S. for cosmetic use, if MYOBLOC is so approved, a milestone payment would be due and the royalty rate will become subject to certain reductions based on cosmetic use net sales. We also have the right under the agreement to make use of, develop and offer for sale, worldwide products containing Botulinum Toxin Type B. The agreement may not be terminated for convenience.

We have a contract manufacturing agreement with Merz Pharma GmbH & Co. KGaA (Merz) for the manufacture and supply of MYOBLOC (Merz Agreement). Pursuant to the Merz Agreement, Merz is required to provide a dedicated manufacturing facility including a stand-alone building, dedicated clean room suites, dedicated manufacturing and purification equipment, and filling and packaging production lines (collectively, the manufacturing facility) to manufacture finished products. The Merz Agreement will expire in July 2027, unless the Company and Merz mutually agree to extend the term. The Merz Agreement may not be terminated for convenience. An amendment to the contract manufacturing agreement with Merz was executed in July 2025. Amendments to the contract manufacturing agreement included among other things, the removal of an annual minimum purchase requirement of MYOBLOC, and the Company's agreement to pay a nonrefundable annual fee of €3.0 million to cover general maintenance and reservation costs for the manufacturing facilities.

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Agreement may not be terminated for convenience. Under the terms of the Merz Agreement, the Company is required to purchase a minimum quantity of finished products on an annual basis. This minimum purchase requirement represents the in-substance fixed contract consideration associated with the dedicated manufacturing facility. The Company has an annual minimum purchase quantity requirement of finished products.

SPN-817 (huperzine A)

In September 2018, we entered into a merger agreement to acquire Biscayne Neurotherapeutics (Biscayne), a privately-held company developing a novel treatment for epilepsy (SPN-817). Through this agreement, we obtained worldwide rights, excluding certain markets in Asia where rights have been previously out-licensed, to SPN-817. SPN-817 has received Orphan Drug Designation from the FDA for the treatment of Dravet Syndrome, a severe form of childhood epilepsy and Lennox-Gastaut Syndrome. We may be obligated to pay up to $73 million to the prior Biscayne security holders if certain development milestones are achieved and up to an additional $95 million if certain sales milestones are achieved. In addition, we will be obligated to pay a low single digit royalty on net sales to the prior Biscayne security holders and any applicable royalties to third parties for the use of in-licensed IP. On ~~The~~January ~~maximum~~22, ~~combined~~2026, ~~royalty~~the weCompany ~~will~~entered ~~pay~~into toan ~~all~~agreement ~~parties~~with onformer ~~net~~Biscayne ~~product~~security ~~sales~~holders isin ~~approximately~~which ~~12%,~~the ~~depending~~Company onwill ~~the~~pay IP$10.0 ~~covering~~million ~~the~~by ~~commercial~~June ~~product~~30, ~~and~~2026, for settlement of certain developmental milestones under the ~~applicable~~merger ~~tiered~~agreement ~~sales~~entered ~~levels~~into in 2018.

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SPN-820 (NV-5138)

In April 2020, we entered into a development agreement (the Development Agreement) with Navitor Inc. We can terminate the Development Agreement upon 30 days' notice. Under the terms of the Development Agreement, the Company and Navitor Inc. will jointly conduct a Phase 2 clinical program for NV-5138 (SPN-820) for treatment-resistant depression. We will bear all of the Phase 1 and Phase 2 development costs incurred by either party, up to a maximum of $50 million, which amount could be increased under the terms of the Development Agreement upon Navitor Inc.’s request and the Company’s consent. In 2020, we paid a one-time, nonrefundable, and non-creditable fee of $10 million for the option to acquire or license NV-5138 (SPN-820) and made a $15 million equity investment representing approximately 13% ownership in Navitor Inc. There are also certain additional payments which could be incurred by us that are contingent upon Navitor Inc. achieving defined milestones. These payments include an additional license or acquisition fee depending on whether we ultimately license or acquire NV-5138 (SPN-820), and subsequent clinical, regulatory and sales milestone payments. The total payments, exclusive of the royalty payments on net sales of NV-5138 (SPN-820) and development costs paid by us under the agreement, have the potential to reach $410 million to $475 million, which includes an aggregate upfront payment of $25 million paid in 2020 for the option to acquire or license NV-5138 (SPN-820) and the equity investment, an additional license or acquisition fee depending on whether we ultimately license or acquire NV-5138 (SPN-820), and subsequent clinical, regulatory and sales based milestone payments. We also will have the first right of refusal for any compound with a similar mechanism of action to NV-5138 (SPN-820) on mTORC1 in the central nervous system.

In addition to entering into the Development Agreement in April 2020, as above mentioned, we acquired Series D Preferred Shares of Navitor Inc. (the Navitor Shares), an equity investment representing an approximately 13% ownership position in Navitor Inc. As part of a legal restructuring in March 2021, our Navitor Inc. Shares were exchanged for membership interests in Navitor Pharmaceutics LLC (Navitor LLC), which became the sole shareholder of Navitor Inc.

In the second quarter of 2024, we consented to payment of additional Phase 2 development costs for NV-5138 (SPN-820) as they are incurred, but reserve the right to terminate payment of future development costs at our discretion.

~~See~~On ~~Part~~May II5, ~~Item~~2025, 8the Company entered into a binding memorandum of understanding (MOU) with Navitor Inc. Under the MOU, ~~Financial~~the ~~Statements~~Company agreed to conduct further development activities at its own cost and ~~Supplementary~~Navitor ~~Data~~Inc. agreed to waive its right to receive the $100 million Initial Acquisition Fee under the Development Agreement. In addition, ~~Note~~pursuant 4to the MOU the Company exercised the Purchase Option to purchase all assets of Navitor and its affiliates pursuant to the Development Agreement, ~~Investments~~subject to, inamong other things, completion of satisfactory due diligence by the ~~Notes~~Company, toand negotiation and execution of a definitive Purchase Agreement. On June 24, 2025, October 31, 2025 and December 22, 2025, the ~~Consolidated~~Company ~~Financial~~amended ~~Statements~~the MOU with Navitor to extend the negotiation period.

See Part II, Item 8, Financial Statements and Supplementary Data, Note 18, Commitments and Contingencies, in the Notes to the Consolidated Financial Statements.

Namzaric

Namzaric (memantine hydrochloride extended release and donepezil hydrochloride) capsules for the treatment of moderate to severe dementia of an Alzheimer's type is currently marketed by Allergan plc under an exclusive license agreement between Adamas Pharmaceuticals and Forest Laboratories Holdings Limited ("Forest"), an indirect, wholly-owned subsidiary of Allergan plc (collectively, "Allergan") in the United States. Adamas Pharmaceuticals receives royalties on net sales of Namzaric from May 2020. Allergan is responsible for all manufacturing related to Namzaric.

In November 2012, Allergan was granted an exclusive license, with right to sublicense, certain of Adamas Pharmaceuticals' intellectual property rights relating to human therapeutics containing memantine in the United States. In connection with these rights, Allergan markets and sells Namzaric (memantine and donepezil hydrochlorides) extended-release capsules and NAMENDA XR (memantine hydrochloride) extended-release capsules for the treatment of moderate to severe dementia related to Alzheimer's disease.

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Adamas Pharmaceuticals is entitled to receive royalties on net sales in the United States by Allergan, its affiliates, or any of its sublicensees of controlled-release versions of memantine products covered by the terms of the license agreement. Allergan's obligation to pay royalties with respect to fixed-dose memantine-donepezil products, including Namzaric, continues until the later of (i) 15 years after the commercial launch of the first fixed-dose memantine-donepezil product by Allergan in the United States or (ii) the expiration of the Orange Book listed patents for which Allergan obtained rights from Adamas covering such product. However, Allergan's obligation to pay royalties for any product covered by the license is eliminated in any quarter where there is significant competition from generics.

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Royalties recognized from Allergan are in the low double digits to mid-teens, as a percent of net sales of Namzaric in the United States. Based on recent trends of Namzaric sales, the tiered royalty is expected to be in the low double digits through the term of the agreement. Based on the current settlement agreements with the Namzaric Abbreviated New Drug Application (ANDA) filers to date, the earliest date on which any of these agreements grant a license to market a Namzaric ANDA filer's generic version of Namzaric is January 1, 2025 (or earlier in certain circumstances). Alternatively, the Namzaric ANDA filers with the earliest license date have the option to launch an authorized generic version of Namzaric beginning on January 1, 2026 instead of launching their own generic version of Namzaric on January 1, 2025. In January 2025, Amneal Pharmaceuticals, Inc. received approval from the FDA and has launched a generic version of Namzaric. Adamas expects that it will not receive royalties from sale of Namzaric after the entry of the generic version of Namzaric in January 2025.

Adamas expects that it will not receive royalties on sales of NAMENDA XR because of the entry of multiple generic versions of NAMENDA XR.

License Agreements with Other Third Parties

The Company has granted other companies, including United Therapeutics Corporation and Takeda Pharmaceuticals Company Ltd., rights to utilize certain of its proprietary technologies in the development of certain of their products. These technologies were used by these companies to develop certain other products, including Orenitram (treprostinil) and Mydayis. We receive royalties under these arrangements based on net product sales of certain products developed using the licensed technologies. In some cases, we are also entitled to milestone payments. The royalty term for Orenitram is expected to cease in 2026.

With respect to Qelbree, Oxtellar XR, and Trokendi XR, we have entered into collaboration and licensing agreements with third parties to commercialize these products outside of the U.S. Under certain licensing arrangements, we are eligible to receive royalties based on net product sales as defined in the agreements and in some cases, we are also entitled to milestone payments. We currently receive royalties from third parties related to agreements for Trokendi XR and Oxtellar XR.

The Company has also entered into settlement and licensing agreements with generic companies to settle patent litigation and to grant non-exclusive licenses to market generic versions of Oxtellar XR and Trokendi XR in the U.S. Under certain licensing arrangements, the Company is eligible to receive royalties based on net product sales as defined in the agreements, and the number of generic equivalent products on the market in the U.S. We currently receive royalties from third parties related to certain agreements for Trokendi XR and Oxtellar XR.

Confidential Information and Inventions Assignment Agreements

We, including our subsidiaries, require our employees, temporary employees, and consultants to execute confidentiality agreements upon the commencement of employment, consulting, or collaborative relationships with us or our subsidiaries. These agreements provide that all confidential information developed by or made known during the course of the relationship with us or our subsidiaries be kept confidential and not disclosed to third parties, except in specific circumstances. For example, nothing in any policy or agreement prohibits (i) reporting any possible violations of applicable laws, rules, or regulations to any governmental agency or government entity or (ii) making any other disclosures that are protected under federal, state, or local laws or regulations in the United States. The agreements provide that all inventions resulting from work performed for us or relating to our business and conceived of or completed by the individual during employment or assignment, as applicable, shall be our exclusive property or the exclusive property of the applicable subsidiary, in each case, to the extent permitted by applicable law.

We and our subsidiaries seek to protect our respective products, product candidates, and our technologies through a combination of patents, trade secrets, proprietary know-how, FDA exclusivity, and contractual restrictions on disclosure.

Government Regulation

U.S. Drug Development Process

18The research and development process generally begins with discovery research, which focuses on the identification of a molecule that has the desired effect against a given disease. If clinical testing is to initiate in the United States, the FDA requires submission of an IND, which must become effective before human clinical trial testing may commence. The results of pre-clinical testing, along with other information, including information about product chemistry, product manufacturing and controls, and a proposed clinical trial protocol, are submitted to the FDA as part of the IND. Until the IND becomes effective following a waiting period, we may not start the clinical trials. This is typically followed by additional preclinical laboratory and animal testing, and adequate and well-controlled human clinical trials to establish the safety and efficacy of the proposed drug for its intended use.

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The research and development process generally begins with discovery research, which focuses on the identification of a molecule that has the desired effect against a given disease. If clinical testing is to initiate in the United States, the FDA requires submission of an IND, which must become effective before human clinical trial testing may commence. The results of pre-clinical testing, along with other information, including information about product chemistry, product manufacturing and controls, and a proposed clinical trial protocol, are submitted to the FDA as part of the IND. Until the IND becomes effective following a waiting period, we may not start the clinical trials. This is typically followed by additional preclinical laboratory and animal testing, and adequate and well-controlled human clinical trials to establish the safety and efficacy of the proposed drug for its intended use. The satisfaction of FDA approval requirements typically takes many years. The actual time required may vary substantially based upon the type, complexity, and novelty of the product or disease.

Preclinical tests include laboratory evaluation, as well as animal studies to assess the characteristics and potential pharmacology, pharmacokinetics, and toxicity of the product. The conduct of the preclinical tests must comply with FDA regulations and requirements, including acceptable laboratory practices.

If preclinical testing of an identified compound proves successful, the compound moves into clinical development. While these are generally conducted in three sequential phases, the phases may overlap or be combined.

•Phase 1 - Involves the first human tests of the drug, in a small number of healthy volunteers or in patients, to assess safety, tolerability, potential dosing, and if possible, early evidence on effectiveness.

•Phase 2 - Involves trials in a relatively small group of patients to determine the effectiveness of the drug for a particular indication(s); dosage tolerance, and optimum dosage; and to identify common adverse effects and safety risks.

•Phase 3 - Involves tests confirming favorable results in earlier phases, in a significantly larger patient population, and to further demonstrate efficacy and safety. Phase 3 trials include both a control group that receives the standard treatment and a study group that receives the new treatment that is being tested.

Clinical trials must be conducted in compliance with applicable regulations and consistent with acceptable clinical practices, as well as protocols detailing not only the objectives of the trial, but also the parameters to be used in monitoring safety of study participants, and/or the parameters to determine effectiveness. Each protocol involving testing on patients, and subsequent protocol amendments, must be submitted to the FDA as part of the IND. The FDA may order the temporary halt or permanent discontinuation of a clinical trial at any time, or to impose other sanctions if they believe that the clinical trial is not being conducted in accordance with the applicable requirements, or if continuing the trial presents an unacceptable risk to the clinical trial patients. The study protocol and informed consent information for patients in clinical trials must also be submitted to an institutional review board (IRB) or ethics committee for approval. The IRB/ethics committee may also require the clinical trial at the site to be halted, either temporarily or permanently, for failure to comply with the IRB/ethics committee requirements, or they may impose other sanctions.

Concurrent with clinical trials, companies usually complete additional animal studies and must develop additional information about the chemistry and physical characteristics of the product candidate. They must finalize a process for manufacturing the product in commercial quantities in accordance with current good manufacturing practice (cGMP) requirements. Moreover, the product used in late-stage clinical trials must be manufactured under the proposed commercial process and at the same scale as will be used commercially. The manufacturing process must be capable of consistently producing quality batches of the product candidate. The manufacturer must develop methods for testing the identity, strength, quality, and purity of the final product. Additionally, appropriate packaging must be selected and tested. Stability studies must be conducted to demonstrate that the product candidate does not undergo unacceptable deterioration over its shelf life under various conditions and for commercially viable lengths of time.

The research and development process, from discovery through a new drug launch, requires substantial time, effort, skill, and financial resources. The research and development of any product candidate has a significant amount of inherent uncertainty. Often, substantial resources must be committed even though success is far from assured. There is no guarantee when, or if, a product candidate will receive the regulatory approval required to launch a new drug or new indication of an existing drug.

In addition to the development of new products and new formulations, research and development projects also may include Phase 4 trials, sometimes called post-marketing studies. For such projects, clinical trials are designed and conducted to collect additional data regarding, among other parameters, the benefits and risks of an approved drug. Alternatively, these trials may be conducted to assess the effectiveness of a product candidate in a new patient population.

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U.S. FDA Review and Approval Processes

Drug development is an inherently uncertain process with a high risk of failure at every stage of development. After the completion of the required clinical testing, an NDA or Biological License Application (hereinafter NDA) is prepared and submitted to the FDA. FDA approval of the NDA is required before marketing of the product may begin in the U.S. The NDA must include the results of all preclinical, clinical, and other testing, along with a description of the manufacturing process, validation of the manufacturing process, analytical tests conducted on the drug, proposed labeling, and other relevant information. The NDA requests approval to market the product. Most NDAs are subject to a substantial user fee at the time of submission; rarely applications meet conditions or gain a waiver which negates the need for the user fee. A holder of an approved NDA may also be subject to annual program and/or establishment fees. These fees typically increase annually.

The FDA has 60 days from its receipt of an NDA to determine whether the application will be accepted for filing, which is based on the agency's threshold determination that the NDA is sufficiently complete to permit substantive review. Sponsors will be notified if the application's review will proceed. Additional information may be requested, rather than accepting an application for filing.

Once the submission is accepted for filing, the FDA begins an in-depth review. Review status could be either standard or priority. A priority review designation means FDA’s goal is to take action on an application within six months, compared to 10 months under standard review. The review process may be extended by the FDA for their initial review, and, if new information submitted during the review, the review period may be extended.

The FDA may also refer applications for novel drug products or drug products that present difficult questions of safety or efficacy to an advisory committee, which is typically a panel that includes clinicians and other experts. The advisory committee reviews and evaluates information and prepares a recommendation as to whether the application should be approved. The FDA is not bound by the recommendation of an advisory committee, but it generally follows such recommendations. After the FDA evaluates the information provided in the NDA, it issues either an approval letter or a complete response letter. A complete response letter outlines the deficiencies in the submission and may require substantial additional testing or information in order for the FDA to reconsider the application. If and when those deficiencies have been timely addressed, the FDA will re-initiate review. If it is satisfied that the deficiencies have been addressed, the FDA will issue an approval letter.

During the review period, the FDA will typically inspect one or more clinical sites to assure compliance with good clinical practice regulations. The FDA may rely on a recent inspection of the facility, or they may decide to inspect each facility at which the drug is manufactured to ensure compliance with cGMP regulations. The FDA may also undertake an audit of nonclinical and clinical sites. The FDA will not approve the product unless compliance is satisfactory and unless the application contains the data that provide substantial evidence that the drug is safe and effective in the indication studied.

A marketing approval authorizes commercial marketing of the drug, with specific prescribing information for specific indications. As a condition of NDA approval, the FDA may require a risk evaluation and mitigating strategy (REMS) to help ensure that the benefits of the drug outweigh the potential risks. REMS can include medication guides, communication plans for health care professionals, and elements to assure safe use, such as restricted distribution methods, patient registries, and other risk minimization tools. Moreover, as a condition to product approval, the FDA may require substantial post-marketing testing and surveillance to monitor the drug's safety or efficacy in commercial use and may impose other conditions, including distribution and labeling restrictions, which can materially affect the potential addressable market and profitability of the drug. Once granted, product approvals may be withdrawn if compliance with regulatory standards is not maintained, if problems are identified following initial marketing, or if post-marketing commitments are not met. Certain of the Company's commercial products have post-marketing commitments.

The approval process is lengthy and difficult. The FDA may refuse to approve the NDA if the applicable regulatory criteria are not satisfied. Further, data obtained from clinical trials are not always conclusive, or the FDA may interpret data differently than us. In addition, if a product receives regulatory approval, the approval may be significantly limited to specific diseases, dosages, or indications. This could restrict the commercial value of the product. Also, the FDA may require that certain contraindications, warnings, or precautions be included in the product labeling, as well as requiring Phase 4 testing or post approval marketing of commercial use.

New Drug Application

Our activities encompass two types of NDAs: Section 505(b)(1) NDA (Full NDA) and Section 505(b)(2) NDA.

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A Section 505(b)(1), which is a "full" or "stand-alone" NDA, must contain all pertinent information and full reports of investigations conducted by the applicant to demonstrate the safety and effectiveness of the drug, as well as complete preclinical, clinical, and manufacturing information.

Section 505(b)(2) NDAs often provide an alternative path to FDA approval for new or improved formulations or new uses of previously approved products. For a Section 505(b)(2) application, the FDA permits the submission of an NDA where at least some of the information required for approval comes from clinical trials not conducted by or for the applicant, and for which the applicant has not obtained a right of reference. The FDA permits the applicant to rely upon the FDA's previous findings of safety and effectiveness for an approved product. The FDA requires submission of information needed to support any changes to a previously approved drug, such as published data or new studies conducted by the applicant, including bioavailability or bioequivalence studies or clinical trials demonstrating safety and effectiveness. The FDA may then approve the new product candidate for all or some of the label indications for which the referenced product has been approved, as well as for any new indication sought by the Section 505(b)(2) applicant. The Section 505(b)(2) regulatory approval process is designed to allow for potentially expedited, lower cost and lower risk regulatory approval, based on previously established safety, efficacy, and manufacturing information on a drug which has been already approved by the FDA for the same or a different indication.

To the extent that the Section 505(b)(2) applicant is relying on studies conducted on previously approved drug product, the Section 505(b)(2) applicant must submit patent certifications with respect to any patents for the approved product on which the application relies that are listed in the FDA's publication, Approved Drug Products with Therapeutic Equivalence Evaluations, commonly referred to as the Orange Book. Specifically, the applicant must certify for each listed patent that either: (1) the required patent information has not been filed; or (2) the listed patent has expired; or (3) the listed patent has not expired but will expire on a particular date, and approval is not sought until after patent expiration; or (4) the listed patent is invalid, unenforceable or will not be infringed by the proposed new product. A certification that the new product will not infringe the previously approved product's listed patent or that such patent is invalid or unenforceable is known as a Paragraph IV certification.

If the applicant does not challenge one or more listed patents through a Paragraph IV certification, the FDA will not approve the Section 505(b)(2) NDA application until all the listed patents claiming the referenced product have expired. Further, the FDA also will not approve, as applicable, a Section 505(b)(2) NDA application until any non-patent exclusivity has expired, for example: five-year exclusivity period for obtaining approval of an NCE; or three year exclusivity period for an approval based on new clinical trials; or pediatric exclusivity, listed in the Orange Book for the referenced product.

A section 505(b)(2) NDA applicant must send notice of the Paragraph IV certification to the owner of the referenced NDA for the previously approved product and relevant patent holders within 20 days after the Section 505(b)(2) NDA has been accepted for filing by the FDA. If the relevant patent holder elects to initiate litigation, the Section 505(b)(2) applicant may invest a significant amount of time and expense in the development of its product, only to be subject to significant delay and patent litigation before its product may be commercialized. Alternatively, if the NDA applicant or relevant patent holder does not file a patent infringement lawsuit within the specified 45 day period, the FDA may approve the Section 505(b)(2) application at any time.

Notwithstanding the approval of many products by the FDA pursuant to Section 505(b)(2) over the last few years, some pharmaceutical companies and others have objected to the FDA's interpretation of Section 505(b)(2). If the FDA changes its interpretation of Section 505(b)(2), or if the FDA's interpretation is successfully challenged in court, this could delay or even prevent the FDA from approving any Section 505(b)(2) NDA that we submit.

By its very nature, a Section 505(b)(1) NDA submission carries a higher degree of regulatory approval risk than a Section 505(b)(2) NDA submission. In addition, a requirement for more extensive testing and development can adversely impact our ability to compete with alternative products that arrive on the market sooner than our product candidate. Further, the time and financial resources required to obtain FDA approval could substantially and materially increase.

Review and Approval of Combination Products

Products comprised of separate components (e.g., a drug and a device; a biologic and a device; a drug and a biologic; or a drug, device, and a biologic) are known as "combination products." Such products often raise regulatory, policy, and review management challenges because they integrate components that are regulated under different types of regulatory requirements and by different FDA Centers, namely, Center for Drug Evaluation and Research (CDER), Center for Devices and Radiological Health (CDRH), and the Center for Biologics Evaluation and Research (CBER) (each a "Center"). Differences in regulatory pathways for each component can impact the regulatory processes for all aspects of product development and management, including preclinical testing, clinical investigation, marketing applications, manufacturing and quality control, adverse event reporting, promotion and advertising, user fees, and post-approval modifications.

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The FDA's Office of Combination Products (OCP) determines which Center will have primary jurisdiction (the "Lead Center") for the combination product based on the combination product's "primary mode of action" (PMOA). A mode of action is the means by which a product achieves an intended therapeutic effect or action. The PMOA is the mode of action that provides the most important therapeutic action of the combination product or the mode of action expected to make the greatest contribution to the overall intended therapeutic effects of the combination product. The Lead Center has primary responsibility for the review and regulation of a combination product; however, a second Center is often involved in the review process, especially to provide input regarding the "secondary" component(s). In most instances, the Lead Center applies its usual regulatory pathway. For example, a drug-device combination product assigned to CDER will typically be reviewed under an NDA, while a drug-device combination product assigned to CDRH is typically reviewed through a 510(k), Premarket Approval Application (PMA), or de novo reclassification request.

Often it is difficult for OCP to determine with reasonable certainty the most important therapeutic action of the combination product. In those difficult cases, OCP will consider consistency with other combination products raising similar types of safety and effectiveness questions, or which Center has the most expertise to evaluate the most significant safety and effectiveness questions raised by the combination product. A sponsor may use a voluntary formal process, known as a Request for Designation, when the product classification is unclear or in dispute to obtain a binding decision as to which a product's primary mode of action as well as which center will regulate the combination product. If the sponsor objects to that decision, it may request that the agency reconsider that decision.

Combination products are subject to application User Fees based on the type of application submitted for the product's premarket approval or clearance. For example, a combination product for which an NDA is submitted is subject to the NDA fee under the Prescription Drug User Fee Act. Likewise, a combination product for which a PMA is submitted is subject to the PMA fee under the Medical Device User Fee and Modernization Act.

Since a combination product incorporates two or more components with different regulatory requirements, a combination product manufacturer must comply with all cGMP and Quality System (QS) Regulation/Medical Device Good Manufacturing Practices (QSR) requirements that apply to each component. The FDA has issued a combination product cGMP regulation, along with final guidance, describing two approaches a combination product manufacturer may follow to demonstrate compliance. Under these two options, the manufacturer demonstrates compliance with:

•All cGMP regulations applicable to each separate regulated component included in the combination product; or

•Either the drug cGMPs or the QSR, as well as with specified provisions from the other of these two sets of requirements (also called the "streamlined approach”).

Pediatric Information

Under the Pediatric Research Equity Act of 2007 (PREA), NDAs or supplements to NDAs must contain data to assess the safety and effectiveness of the drug for the claimed indication(s) in all relevant pediatric subpopulations and to support dosing and administration for each pediatric subpopulation for which the drug is safe and effective. The intent of the PREA is to compel sponsors whose drugs have pediatric applicability to study those drugs in pediatric populations, rather than ignoring pediatric indications for adult indications that could be more economically desirable. The FDA may grant deferrals for submission of data, full waivers, or partial waivers of the data requirements. Unless otherwise required by regulation, PREA does not apply to any drug for an indication for which an Orphan Drug Designation has been granted.

Orphan Drug Designation

Orphan Drug Designation is granted by the FDA to drugs intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the U.S., but there is no reasonable expectation that the cost of developing and making the product available in the U.S. for the disease or condition will be recovered from sales of the product. Orphan Drug Designation must be requested before submitting an NDA. Orphan Drug Designation does not convey any advantage or shorten the duration of the regulatory review and approval process. However, if an orphan drug later receives approval for the indication for which it has an orphan designation, the FDA may not approve any other applications to market the same drug for the same indication. Exceptions to this policy include showing clinical superiority to the product with the orphan drug exclusivity or if the license holder cannot supply sufficient quantities of the product. Orphan drug exclusivity in the U.S., which is seven years, does not prevent the FDA from approving a different drug for the same disease or condition, or the same drug for a different disease or condition, provided the sponsor has conducted appropriate clinical trials required for approval. Among the other benefits of an Orphan Drug Designation, are tax credits for certain research expenses and waiver of the NDA application user fee for the orphan indication. However, a competitor obtaining orphan product exclusivity for a therapeutic agent

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before we do, could block the approval of one of our products for seven years for the same indication, unless we are able to demonstrate that our product is clinically superior, or the competitor cannot supply sufficient quantities of the product.

Priority Review

Under FDA policies, a drug candidate is eligible for priority review, or review within six months from filing, for a new molecular entity (NME). In addition, a six month review period may pertain to a non-NME if the drug candidate provides a significant improvement as compared to marketed drugs in the treatment, diagnosis, or prevention of disease. A fast track designated drug candidate would ordinarily meet the FDA's criteria for priority review. The FDA makes its determination of priority or standard review during the 60-day filing period post the initial NDA submission.

Fast Track Designation

The FDA is required to facilitate the development and expedite the review of drugs that are intended for the treatment of a serious or life-threatening condition and for which there is currently no effective treatment. These products must demonstrate the potential to address unmet medical needs for the condition. The FDA must determine if the drug candidate qualifies for the fast track designation within 60 days of receipt of the sponsor's request. Once the FDA designates a drug as a fast track candidate, it is required to facilitate the development and expedite the review of that drug by providing more frequent communication and guidance to the sponsor. In addition to other benefits such as greater interaction with the FDA, the FDA may initiate a review of the sections of a fast track drug's NDA before the application is complete. This rolling review is available if the applicant provides and the FDA approves a schedule for the submission of the remaining information, and if the applicant pays the applicable user fees. However, the FDA's review period for filing and reviewing an application does not begin until the last section of the NDA has been submitted. Additionally, a fast track designation may be withdrawn by the FDA, if the FDA believes that the designation is no longer supported by data emerging in the clinical trial process.

Post-Approval Regulatory Requirements

Any drugs for which we receive FDA approval are subject to continuing regulation by the FDA, including, among other things: record-keeping requirements; reporting of adverse events with the product; providing the FDA with updated safety and efficacy information; product sampling and distribution requirements; complying with certain electronic records and signature requirements; and complying with FDA promotion and advertising requirements.

Drugs may be promoted only for the approved indication and in accordance with the provisions of the approved label. Changes to some of the conditions established in an approved application, including changes in indications, labeling, or manufacturing processes or facilities, may require submission for further review and approval by the FDA before the change can be implemented.

Adverse event reporting and submission of periodic reports is required following marketing approval. The FDA may also require post-marketing testing, known as Phase 4 testing, REMS, and surveillance to monitor the effects of an approved product, or place conditions on an approval that could restrict the distribution and use of the product.

In addition, quality control, as well as the manufacture, packaging and labeling procedures must continue to conform to cGMPs after approval. Drug manufacturers and other entities involved in the manufacturing and distribution of approved drugs are subject to periodic unannounced inspections by the FDA and certain state agencies for compliance with cGMPs. Accordingly, manufacturers must continue to expend time, money, and effort in the areas of production and quality control to maintain compliance with cGMPs. Regulatory agencies may withdraw product approval, or request product recalls if a company fails to comply with regulatory standards, or if it encounters problems following initial marketing, or if previously unrecognized problems are subsequently discovered. In addition, prescription drug manufacturers in the U.S. must comply with applicable provisions of the Drug Supply Chain Security Act, provide and receive product tracing information; maintain appropriate licenses, ensure they only work and contract with other properly licensed entities, and have procedures in place to identify and properly handle suspect and illegitimate products.

Patent Term Restoration and Marketing Exclusivity

Depending upon the timing, duration, and specifics of FDA marketing approval of our product candidates, some of our U.S. patents may be eligible for limited PTE under the Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit a patent term restoration of up to five years as compensation for patent term lost during product development and during the FDA regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the product's approval date. The patent term restoration period is generally 50% of the time between the effective date of an IND and the submission date of an NDA, plus the time between the submission date of an NDA and the approval of that

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application. Only one patent applicable to an approved drug is eligible for the extension, and the application for the extension must be submitted prior to the expiration of the patent and within sixty days of approval of the drug. The USPTO, in consultation with the FDA, reviews and approves the application for any patent term extension or restoration.

Market exclusivity provisions under the Federal Food, Drug, and Cosmetic Act (FDCA) can also delay the submission or the approval of certain applications. The FDCA provides a five-year period of non-patent marketing exclusivity within the U.S. to the first applicant to gain the approval of an NDA for an NCE. A drug is an NCE if the FDA has not previously approved any other new drug containing the same active pharmaceutical ingredient (API) or active moiety, which is the molecule or ion responsible for the therapeutic action of the drug substance. During the exclusivity period, the FDA may not accept for review an ANDA or a Section 505(b)(2) NDA submitted by another company for another version of such drug, where the applicant does not own or have a legal right of reference to all the data required for approval. As an alternative to submission via 505(b)(2) approval, an applicant may choose to submit a full Section 505(b)(1) NDA, wherein the applicant would be required to conduct its own preclinical and adequate, well-controlled clinical trials to demonstrate safety and effectiveness. They may not refer to other clinical trials or data.

The FDCA also provides three years of marketing exclusivity for an NDA, Section 505(b)(2) NDA, or supplement to an existing NDA, if new clinical investigations (other than bioavailability studies) that were conducted or sponsored by the applicant are deemed by the FDA to be essential to the approval of the application. Such clinical trials may, for example, support: new indications; dosages; routes of administration; or strengths of an existing drug. Alternatively, these trials may be for a new use if the new clinical investigations conducted or sponsored by the applicant are determined by the FDA to be essential to the approval of the application. This exclusivity, sometimes referred to as clinical investigation exclusivity, prevents the FDA from approving an application under Section 505(b)(2) for the same conditions of use associated with the new clinical investigations before the expiration of three years from the date of approval. Such three-year exclusivity, however, would not prevent the approval of another application if the applicant submits a Section 505(b)(1) NDA and has conducted its own adequate, well-controlled clinical trials demonstrating safety and efficacy, nor would it prevent approval of a Section 505(b)(2) product that did not incorporate the exclusivity-protected changes of the approved drug product. The FDCA, FDA regulations, and other applicable regulations and policies provide incentives to manufacturers to create modified, non-infringing versions of a drug to facilitate the approval of an ANDA or other application for generic substitutes.

Pediatric exclusivity is a type of non-patent marketing exclusivity granted in the U.S. If granted, pediatric exclusivity, provides an additional six months of exclusivity to be attached to any existing exclusivity (e.g., three or five year exclusivity) or to patent protection for a drug. This six month exclusivity, which runs from the end of other exclusivity protection or patent delay, may be granted based on the voluntary completion of a pediatric trial in accordance with an FDA-issued "Written Request" for such a trial.

Other Regulatory Requirements

In March 2019, MDD US Operations, LLC (formerly US WorldMeds, LLC) and its subsidiary, Solstice Neurosciences, LLC (US) (collectively, the MDD Subsidiaries), which are subsidiaries of the Company, entered into a Corporate Integrity Agreement (CIA) with the Office of Inspector General of the U.S. Department of Health and Human Services. Under the CIA, the MDD Subsidiaries agreed to pay $17.5 million to resolve U.S. Department of Justice allegations that the MDD Subsidiaries violated the False Claims Act by paying kickbacks to induce the use of APOKYN and MYOBLOC (collectively, the MDD Products). The fine was paid by the MDD Subsidiaries prior to the closing of the USWM Acquisition. The False Claims Act provides that any Person who knowingly submits false claims to the government is liable for treble damages as well as additional penalties.

As a consequence of the USWM Acquisition, and under the terms of the CIA, the Company ~~has~~ assumed the extensive obligations of the MDD Subsidiaries concerning the ongoing maintenance of an effective compliance and disclosure program to promote compliance with the statutes, regulations and written directives of Medicare, Medicaid and all other Federal health care programs and with the statutes, regulations and written directives of the FDA. The CIA has a term of five years, with the final Reporting Period ending in April 2024, and ~~imposes~~imposed material burdens on the Company, its officers and directors to take actions designed to ensure compliance with applicable healthcare laws, including requirements to maintain specific compliance positions within the Company, to report any non-compliance with the terms of the agreement, to submit annual reports to the Office of Inspector General of the U.S. Department of Health and Human Services and to have prepared an annual audit by an Independent Review Organization. The Company submitted its final report during the second quarter of 2024 and ~~currently~~received ~~expects~~an ~~the~~official ~~review~~notification of ~~its~~release ~~report~~from ~~for~~ the ~~final~~Office ~~Reporting Period to conclude during the first half~~ of ~~2025. The CIA sets forth potentially substantial stipulated monetary penalties for non-compliance with~~ the ~~terms~~Inspector ofGeneral ~~the agreement. In addition, the Company may be excluded from participation~~ in ~~federally~~April ~~funded~~2025 ~~healthcare~~and ~~programs~~thus ~~for~~no alonger ~~material~~remains ~~breach~~subject ofto ~~the~~its ~~CIA,~~obligations ~~which~~under ~~would result in substantial losses to~~ the ~~Company~~CIA.

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In 2022 the IRA was enacted, which made significant changes to how drugs are covered and paid for under the Medicare program, including the creation of financial penalties for drugs whose prices rise faster than the rate of inflation, redesign of the Medicare Part D program to require manufacturers to bear more of the liability for certain drug benefits, and government price-setting for certain Medicare Part D drugs, starting in 2026, and Medicare Part B drugs starting in 2028.

Additional changes to the HealthCare Reform Law include The American Taxpayer Relief Act of 2012, which reduced Medicare payments to several types of providers and increased the statute of limitations period for the government to recover overpayments to providers from three years to five years.

The U.S. has enacted a number of legislative and regulatory proposals to change the healthcare system in ways that could affect our ability to sell our products profitably. In the U.S., the Patient Protection and Affordable Care Act of 2010, as amended by the Health Care and Education Reconciliation Act of 2010 (as amended), is a sweeping measure intended to improve quality of care, constrain healthcare spending, and expand healthcare coverage within the U.S. This is accomplished primarily through the imposition of health insurance mandates on employers and individuals and the expansion of the Medicaid program.

In ~~addition~~March 2010, a comprehensive change to ~~FDA~~the ~~restrictions~~U.S. onhealthcare system, known as the ~~marketing~~Patient Protection and Affordable Care Act of ~~pharmaceutical~~2010 ~~products~~(ACA) was enacted, ~~several~~as ~~other~~amended ~~types~~by ofthe ~~state~~Health Care and ~~federal~~Education Reconciliation Act of 2010. These laws and their regulations (collectively the HealthCare Reform Law) have ~~been~~far ~~applied~~reaching consequences for pharmaceutical companies like the Company. Possible revisions to ~~restrict~~the ~~certain~~HealthCare ~~business~~Reform Law are the subject of continuing legislative debates and ~~marketing~~litigation. ~~practices~~Changes in the ~~pharmaceutical~~2025 ~~industry~~CMS inmarketplace ~~recent~~rules ~~years.~~include, ~~These~~among ~~laws~~other ~~include:~~things, ~~anti-kickback;~~the ~~false~~expiration ~~claims;~~of ~~patient~~enhanced ~~data~~premium ~~privacy;~~tax ~~civil~~credits, ~~monetary~~eligibility ~~penalties~~changes ~~statute;~~for ~~and~~Deferred ~~security~~Action ~~and~~for ~~transparency~~Childhood ~~statutes~~Arrival recipients, the elimination of the Special Enrollment Period for individuals with incomes at or below 150% of the Federal Poverty Level except with a Qualifying Life Event, stricter income verification, and ~~regulations~~the elimination of the automatic 60-day extension to resolve income inconsistencies (reverting to the standard 90 days). Reductions in subsidies, such as the expiration of the enhanced premium tax credits, may reduce the number of patients with health insurance, which in turn could reduce patients’ ability to purchase our products.

The HealthCare Reform Law exerts downward pressure on pharmaceutical pricing, especially under the Medicare and Medicaid programs, and has increased the industry's regulatory burden and operating costs. Among the provisions of the HealthCare Reform Law of importance to the Company's products and product candidates are the following:

•An annual, nondeductible fee payable to the U.S. federal government by any entity that manufactures or imports specified branded prescription drugs or biologic agents. This fee is based on each company's market share of prior year total sales of branded products to certain federal healthcare programs;

•An increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program;

•Rebates owed by manufacturers under the Medicaid Drug Rebate Program (MDRP) for drugs that are inhaled, infused, instilled, implanted, or injected. During 2020, the Centers for Medicare & Medicaid Services (CMS) issued a Final Rule that makes significant modifications to the Medicaid Drug Rebate Program regulations in several areas, including with respect to the treatment of value-based purchasing arrangements, the definition of key terms, and the price reporting treatment of manufacturer-sponsored patient benefit programs. On May 26, 2023, CMS issued a proposed rule seeking to implement policies in the MDRP related to the new legislative requirements in the Medicaid Services Investment and Accountability Act of 2019 to address, among other things, drug misclassification and drug pricing and product data misreporting by manufacturers

•A Medicare Part D coverage gap discount program, in which manufacturers must agree to offer a substantial point-of-sale discount off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer's outpatient drugs to be covered under Medicare Part D;

•Extension of manufacturers' Medicaid rebate liability to individuals enrolled in Medicaid managed care organizations;

•Expansion of the eligibility criteria for Medicaid programs in certain states;

•Expansion of the entities eligible for discounts under the Public Health Service pharmaceutical pricing program;

•A requirement to annually report the number of drug samples that manufacturers and distributors provide to physicians; and

•A Patient-Centered Outcomes Research Institute to oversee, identify priorities for, and conduct comparative clinical effectiveness research, and provide funding for such research.

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In addition to FDA restrictions on the marketing of pharmaceutical products, several other types of state and federal laws have been applied to restrict certain business and marketing practices in the pharmaceutical industry in recent years. These laws include: anti-kickback; false claims; patient data privacy; civil monetary penalties statute; and security and transparency statutes and regulations. Regulations include, but are not limited to:

•The federal healthcare program Anti-Kickback Statute (AKS), which prohibits, among other things, persons from knowingly and willfully soliciting, receiving or providing remuneration, directly or indirectly, to induce either the referral of an individual for an item or service or the purchasing or ordering of a good or service, for which payment may be made under federal healthcare programs such as the Medicare and Medicaid programs. A person or entity does not need to have actual knowledge or specific intent to violate the federal AKS to have committed a violation. Further, the government may assert that a claim, including items and services resulting from a violation of the federal AKS, constitutes a false or fraudulent claim for purposes of the federal False Claims Act, as discussed below. On December 2, 2020, additional AKS regulations were finalized and took effect in January 2021, which modified existing AKS safe harbors, created new AKS safe harbors, and created a new CMP law exception. Safe harbors protect certain arrangements from prosecution if each of the elements of the safe harbor is satisfied;

•The HHS OIG Special Fraud Alert published on November 16, 2020, which addresses the manufacturer Speaker Programs, and signals both a narrower government view of AKS compliance with respect to such programs as well as the potential for increased enforcement in the space by government oversight agencies such as OIG and the Department of Justice;

•Federal civil and criminal false claims laws and civil monetary penalty laws, which prohibit, among other things: individuals or entities from knowingly presenting, or causing to be presented, claims for payment from Medicare, Medicaid, or other third-party payors that are false or fraudulent; knowingly making a false statement material to an obligation to pay or transmit money to the federal government; or knowingly concealing or improperly avoiding or decreasing an obligation to pay money to the federal government;

•Federal physician payment transparency requirements under the ACA, commonly referred to as the Physician Payments Sunshine Act, which requires manufacturers of drugs, devices, biologics, and medical supplies to report to HHS information related to physician payments, and to report other transfers of value, physician ownership, and investment interests;

•Federal price reporting laws, which require the Company to calculate and report complex pricing metrics to government programs, where such reported prices may be used in the calculation of reimbursement and/or discounts on the Company's commercial products;

•The FDCA, which among other things, strictly regulates drug product marketing, prohibits manufacturers from marketing drug products for off-label use, and regulates the distribution of drug samples;

•State law equivalents of each of the above federal laws, such as state anti-kickback laws, physician payment, and drug pricing transparency laws, and false claims laws, which may apply to the Company's business practices, including, but not limited to: (i) research, distribution, sales and marketing arrangements; (ii) claims for items or services reimbursed by any third-party payor, including commercial insurers; (iii) state laws that require pharmaceutical companies to comply with the pharmaceutical industry's voluntary compliance guidelines, and the applicable compliance guidance promulgated by the federal government; and (iv) state laws that otherwise restrict payments that may be made to healthcare providers. Many of these state laws differ from one another in significant ways and often are not preempted by federal laws, thus complicating compliance efforts;

•Certain state laws require pharmaceutical companies to comply with voluntary compliance guidelines promulgated by a pharmaceutical industry association and relevant compliance guidance issued by HHS OIG, bar drug manufacturers from offering or providing certain types of payments or gifts to physicians and other healthcare providers, and/or require disclosure of gifts or payments to physicians and other healthcare providers;

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changes purport to require that discounted prices be offered for certain United States Department of Defense purchases for its TRICARE program via a rebate system. Participation under the VHCA requires submission of pricing data and calculation of discounts and rebates pursuant to complex statutory formulas, as well as the entry into government procurement contracts governed by the Federal Acquisition Regulations; and

•Similar healthcare laws in the European Union and other jurisdictions, including reporting requirements detailing interactions with and payments to healthcare providers.

•The Federal Health Insurance Portability and Accountability Act of 1996 (HIPAA), which prohibits a scheme to defraud any healthcare benefit program or making false statements relating to healthcare matters. Similar to the federal AKS, a person or entity does not need to have actual knowledge or specific intent to violate HIPAA in order to have committed a violation. On December 10, 2020, HHS released proposed modifications to the HIPAA Privacy Rule, which, if adopted, would change rules related to patient access to HIPAA protected records, among others. In 2021 OCR sought feedback on the proposed HIPAA changes. Publication of the Final Rule has not yet occurred;

•HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 (commonly referred to as the HITECH Act), which imposes certain requirements relating to the privacy, security, and transmission of individually identifiable health information; and

•Various state and foreign laws also govern the privacy and security of health information in some circumstances, and many of these laws differ from each other in significant ways and often are not preempted by HIPAA.

The Federal Open Payments program requires certain manufacturers, including those that engage in the production, preparation, propagation, compounding, or conversion of drugs, devices, biological, and medical supplies for which payment is available under Medicare, Medicaid, or the Children's Health Insurance Program, with certain exceptions, to report annually to the federal government information related to payments and other transfers of value made to physicians (defined to include doctors, dentists, optometrists, podiatrists, and chiropractors) and teaching hospitals, as well as certain ownership and investment interests held by physicians and their immediate family members. We are also required to report information regarding payments and other transfers of value provided during the previous year to physician assistants, nurse practitioners, clinical nurse specialists, certified nurse anesthetists and anesthesiologist assistants, and certified nurse-midwives.

The U.S. Foreign Corrupt Practices Act (FCPA), to which we are also subject, prohibits corporations and individuals from engaging in certain activities to obtain or retain business or influence a person working in an official capacity. Under the FCPA, it is illegal to pay, offer to pay, or authorize the payment of anything of value to any foreign government official, government staff member, political party, or political candidate in an attempt to obtain or retain business or otherwise influence a person working in an official capacity. Historically, pharmaceutical companies have been the target of FCPA and other anti-corruption investigations and penalties.

In addition, we are subject to data privacy and security regulations by the federal government, the states, and certain foreign governments in which we conduct our business. The legislative and regulatory landscape for privacy and data protection continues to evolve, and there has been an increasing focus on privacy and data protection issues which may affect our business. Numerous federal and state laws and regulations, including state security breach notification laws, state health information privacy laws and federal and state consumer protection laws, govern the collection, use, disclosure, and protection of personal information. Failure to comply with such laws and regulations could result in government enforcement actions and create liability for us (including the imposition of significant penalties), private litigation and/or adverse publicity that negatively affects our business. In addition, healthcare providers who prescribe our products and research institutions we collaborate with are subject to privacy and security requirements under the Health Insurance Portability and Accountability Act of 1996 (HIPAA), as amended by the Health Information Technology for Economic and Clinical Health Act (HITECH). HIPAA and its implementing regulations impose certain requirements on covered entities, including certain healthcare providers, health plans, and healthcare clearinghouses as well as their respective business associates (including us) that create, receive, maintain or transmit individually identifiable health information for or on behalf of a covered entity and their subcontractors that use, disclose, access, or otherwise process individually identifiable protected health information, relating to the privacy, security and transmission of individually identifiable health information. Among other things, HITECH makes HIPAA's privacy and security standards directly applicable to business associates, which are independent contractors or agents of covered entities that receive or obtain protected health information in connection with providing a service on behalf of a covered entity. HITECH also created four new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly applicable to business associates and possibly other persons, and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorneys' fees and costs associated with pursuing federal civil actions. In addition, state laws govern the privacy and security of health information in certain circumstances, many of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts.

In order to be eligible to have our products paid for with federal funds under the Medicaid and Medicare Part B programs and purchased by certain federal agencies and grantees, we must comply with the Veterans Health Care Act of 1992 (VHCA). The VHCA requires manufacturers to offer their covered drugs (biologics and single source and innovator multiple source drugs) for sale to certain federal agencies, including but not limited to, the Department of Veterans Affairs (VA), on a Federal Supply Schedule contract, at a price no higher than the statutory Federal Ceiling Price (FCP). The FCP is based on the non-federal average manufacturer price, or Non-FAMP, which we will have to calculate and report to the VA on a quarterly and annual basis. In addition, the Federal Supply Schedule contract requires compliance with applicable federal procurement laws.29

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laws govern the privacy and security of health information in certain circumstances, many of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts.

Depending on the circumstances, failure to comply with these laws can result in penalties, including significant criminal, civil, and/or administrative criminal penalties, damages, fines, disgorgement, exclusion of products from reimbursement under government programs, "qui tam" actions brought by individual whistleblowers in the name of the government, imprisonment, additional reporting requirements and oversight if we become subject to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, refusal to allow us to enter into supply contracts, including government contracts, reputational harm, diminished profits, and future earnings, and the curtailment or restructuring of our operations, any of which could adversely affect our business.

In addition to regulations in the U.S., we are subject to a variety of foreign regulations governing clinical trials, commercial sales, as well as the distribution of our product candidates, to the extent we choose to clinically evaluate or sell products outside of the U.S. Whether or not we obtain FDA approval for a product, we must obtain approval of a product by the appropriate regulatory authorities of foreign countries before we can commence clinical trials or marketing of the product in those countries. The requirements, approval process and the time frame varies for each jurisdiction. As in the U.S., post-approval regulatory requirements, such as those regarding product manufacture, marketing, or distribution, would apply to any product that is approved outside the U.S. We generally market our products outside of the U.S. through licensing arrangements.

Refer to Part I, Item 1A—Risk Factors, for discussion of risks associated with government regulations.

Pharmaceutical Coverage, Pricing, and Reimbursement

Significant uncertainty exists as to the third-party payor coverage and reimbursement status of any of our products and product candidates for which we obtain regulatory approval. Sales of any products for which we receive regulatory approval for commercial sale will depend in part on the availability of reimbursement from third-party payors. Third-party payors include government health administrative authorities, managed care providers, private health insurers, and other entities. The process for determining whether a payor will provide coverage for a drug product may be separate from the process for setting the price or reimbursement rate that the payor will pay for the drug product. Third-party payors may limit coverage to specific drug products on an approved list, or formulary, which might not include all of the FDA-approved drug products for a particular indication. Third-party payors are increasingly challenging prices and examining the medical necessity and cost-effectiveness of medical products and services, in addition to their safety and efficacy. We may need to conduct expensive pharmaco-economic studies in order to demonstrate the medical necessity and cost-effectiveness of our products, in addition to the costs required to obtain the FDA approvals. Our product candidates may not be considered medically necessary or cost-effective by such third-party payors. A third-party payor's decision to provide coverage for a drug product does not imply that an adequate reimbursement rate will be approved. Adequate third-party reimbursement may not be available to enable us to maintain price levels sufficient to realize an appropriate return on our investment in product development.

The Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act, collectively known as the Affordable Care Act (ACA), substantially changed the way healthcare is financed by both governmental and private insurers and significantly impacted the pharmaceutical industry. Federal, state, and local governments in the U.S. continue to consider legislation to limit the growth of health care costs, including the cost of prescription drugs. Future legislation could limit payments for pharmaceuticals, such as the product candidates that we are developing.

~~The~~In ~~Inflation~~February ~~Reduction~~2026, ~~Act~~pharmacy ofbenefit ~~2022~~manager ~~(IRA)~~reform ~~includes~~provisions ~~measures~~were ~~intended~~enacted toas ~~lower~~part ~~the cost~~ of ~~prescription~~the ~~drugs~~Consolidated ~~and~~Appropriations ~~related~~Act ~~healthcare~~of 2026. These reforms, ~~such~~which asare ~~limits~~scheduled ~~on price increases and subjecting an escalating number of drugs~~ to ~~annual~~be ~~price~~implemented ~~negotiations~~in ~~with Centers for Medicare & Medicaid Services (CMS). Specifically~~2028, ~~the~~require ~~IRA~~that ~~authorizes~~certain ~~and~~compensation ~~directs HHS~~ to ~~set~~pharmacy ~~drug~~benefit ~~price~~managers ~~caps~~under ~~for certain high-cost~~ Medicare Part ~~B and Part~~ D ~~qualified~~be ~~drugs,~~structured ~~with~~as ~~the~~bona ~~initial~~fide ~~list~~service offees ~~drugs~~that ~~announced~~are infixed ~~August~~dollar ~~2023. On August 14~~amounts, ~~2024,~~satisfy ~~CMS~~regulatory ~~announced~~requirements ~~that~~for itbona ~~had~~fide ~~selected~~service 10fees, ~~drugs~~and ~~covered~~are ~~under~~not ~~Medicare~~determined ~~Part~~based Don ~~for~~a ~~negotiation~~drug’s ~~for initial maximum~~ price ~~applicability~~or ~~for calendar year 2026~~volume. ~~None of the selected drugs were Supernus products.~~ The ~~IRA~~legislation also ~~authorizes~~restricts ~~HHS to penalize pharmaceutical manufacturers that increase~~ the ~~price~~use of ~~certain~~spread ~~Medicare~~pricing ~~Part B~~ and ~~Part~~certain Drebate-based ~~drugs~~renumeration, ~~faster~~and ~~than~~imposes ~~the~~additional ~~rate~~transparency ofand ~~inflation~~reporting obligations. ~~The~~Although ~~IRA~~these ~~also~~provisions ~~creates~~primarily ~~significant~~regulate ~~changes~~intermediaries, tothey ~~the~~may ~~Medicare~~affect ~~Part~~coverage Dof ~~benefit~~our ~~design~~products byand ~~capping~~could ~~Part~~adversely Daffect ~~beneficiaries' annual out-of-pocket spending~~revenues.

The marketability of any product candidates for which we receive regulatory approval for commercial sale may suffer if the government and third-party payors fail to provide adequate coverage and reimbursement. In addition, emphasis on managed care in the United States has increased, and we expect will continue to increase the pressure on pharmaceutical drug pricing. Coverage policies and third-party reimbursement rates may change at any time. Even if favorable coverage and reimbursement status is attained for one or more products for which we receive regulatory approval, less favorable coverage policies and reimbursement rates may be implemented in the future.30

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~~that~~The ~~it's~~Inflation inReduction ~~their~~Act ~~interest~~of 2022 (IRA) includes measures intended to ~~take~~lower ~~legislative~~the ~~action~~cost inof ~~order~~prescription todrugs ~~curb~~and ~~drug~~related healthcare reforms, such as limits on price increases and tosubjecting ~~decrease~~an ~~their~~escalating number of drugs to annual ~~pharmaceutical~~price ~~spending~~negotiations with Centers for Medicare & Medicaid Services (CMS). ~~This~~Specifically, ~~momentum~~the isIRA ~~likely~~authorizes and directs HHS to ~~continue~~set indrug price caps for certain high-cost Medicare Part B and Part D qualified drugs, with the ~~years~~initial ~~ahead~~list of drugs announced in August 2023. On ~~Many~~November of17, 2023, CMS released final program guidance to pharmaceutical manufacturers and Part D plan sponsors for implementing the ~~enacted~~Medicare ~~state~~Part D Manufacturer Discount Program. HHS and CMS are continuing to announce drugs for price ~~transparency~~negotiation, produce draft guidance, and finalize regulations ~~fall~~in ~~into~~an ~~the~~effort ~~following~~to ~~categories:~~implement ~~advance~~to ~~notice~~IRA. ofOn ~~price~~August ~~increases;~~14, ~~price~~2024, ~~increase~~CMS ~~reporting;~~announced ~~periodic~~that ~~price~~it ~~reports;~~had ~~new~~selected ~~drug~~10 ~~reporting;~~drugs covered under Medicare Part D for negotiation for initial maximum price ~~information~~applicability ~~disclosures~~for tocalendar ~~Health~~year ~~Care~~2026. ~~Professionals~~None ~~and~~of ~~state~~the ~~agencies~~selected drugs were Supernus products. The ~~potential~~IRA ~~penalties~~also ~~for~~authorizes ~~noncompliance~~HHS ~~vary~~to bypenalize ~~state~~pharmaceutical ~~regulation.~~manufacturers ~~While~~that increase the price of certain ~~regulations~~Medicare doPart ~~not~~B ~~contain~~and ~~specific~~Part ~~penalty~~D ~~clauses,~~drugs ~~most~~faster dothan ~~and~~the ~~can~~rate ~~contain~~of ~~penalties~~inflation. ~~that~~The ~~can~~IRA bealso creates significant ~~per~~changes ~~violation~~to ~~for~~the ~~noncompliance~~Medicare Part D benefit design by capping Part D beneficiaries' annual out-of-pocket spending.

Beginning in 2025, all Medicare prescription drug plans (Medicare Part D plans) — including both standalone Medicare prescription drug plans and Medicare Advantage plans with prescription drug coverage — were required to offer enrollees the option to pay out-of-pocket prescription drug costs in the form of capped monthly installment payments instead of all at once at the pharmacy. In January 2026, CMS announced the election of 15 additional prescription drugs for negotiation, representing the third round of drugs selected under the program. Negotiated prices for these drugs, once agreed, will become effective January 1, 2028. None of the selected drugs were Supernus products. The Company cannot predict whether additional legislation or rulemaking related to the IRA will be issued or enacted, or what impact, if any, such changes will have on the profitability of any of the Company's products. There also may be future changes unrelated to the IRA that result in reductions in potential coverage and reimbursement levels for the Company's products, and we cannot predict the scope of any future changes or the impact that those changes may have on its business. In addition, a Medicare Part D prescription drug $2,000 out-of-pocket limit was implemented.

Other U.S. healthcare cost containment statutes and policy measures include:

•The 2013 Drug Quality and Security Act (DQSA) creates the requirement for companies to trace, verify and identify all products through the entire supply chain, from manufacturer to dispenser. Title I of the DQSA, the Compounding Quality Act, increased regulation of compounding drugs. Title II of DQSA, the Drug Supply Chain Security Act (DSCSA) established requirements to facilitate improved tracking of prescription drug products through the supply chain with increased product identification requirements. DSCSA requires such tracking to be done farther down the distribution chain, including (i) wholesalers' verification and tracking, (ii) pharmacy verification and tracking, and (iii) at the unit level throughout the entire supply chain. In August 2023, FDA announced final guidance pertaining to Title II, entitled “Enhanced Drug Distribution Security Requirements Under Section 582(g)(1) of the Federal Food, Drug, and Cosmetic Act--Compliance Policies.” This guidance describes FDA’s compliance policies for enforcement of requirements for the interoperable, electronic, package level product tracing (enhanced drug distribution security requirements) under the Federal Food, Drug, and Cosmetic Act (FDCA), effective November 27, 2023. Specifically, the guidance described that, until November 27, 2024, the FDA did not intend to take action to enforce requirements for the interoperable, electronic, package level product tracing under section 582(g)(1) of the FDCA Act that went into effect on November 27, 2023. The FDA issued an additional guidance document in October 2024 noting that companies in the pharmaceutical distribution supply chain who have initiated their systems and processes and established electronic DSCSA data connections with their trading partners may need additional time beyond November 27, 2024 to strengthen capabilities to mitigate data issues associated with electronic DSCSA transaction information and transaction statements to ensure uninterrupted product distribution. The October 2024 guidance specifies that the FDA is responding to such need by issuing exemptions to accommodate the additional time needed by such trading partners beyond November 27, 2024, but such exemptions apply only to trading partners who have initiated their systems and processes and established electronic DSCSA data connections with their trading partners prior to November 27, 2024. The guidance also provides that such exemptions will extend beyond November 27, 2024, for different lengths of time depending on the category of the trading partner (i.e., manufacturers and repackagers, wholesale distributors, dispensers with 26 or more full time employees). The Trump Administration has not made any updates to, or rescinded, the October 2024 guidance document.

•In 2016, the 21st Century Cures Act (Cures Act) was enacted and authorized increased funding for the FDA to spend on innovation projects, amended the Public Health Service Act (PHSA) to reauthorize and expand funding for the National Institutes of Health (NIH), established the NIH Innovation Fund to pay for the cost of development and implementation of a strategic plan, early stage investigations, and research; and charged the NIH with leading and coordinating expanded pediatric research. The Cures Act also directed the Centers for Disease Control and Prevention to expand surveillance of neurological diseases. There often are delays between the enactment of laws and the effective date of regulations for the enforcement of laws, and this was the case for the Cures Act. Although enacted in 2016, the Department of Health and

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Human Services (HHS), Office of Inspector General (OIG) did not publish a final rule amending the civil money penalty (CMP) regulations of HHS OIG until July 3, 2023. This final rule implements three statutory provisions: (1) the amendment of the PHSA by the Cures Act authorizing OIG to investigate claims of information blocking; (2) the amendment of the Civil Monetary Penalties Law (CMPL), authorizing HHS to impose CMPs, assessments, and exclusions upon individual and entities that engage in fraud and other misconduct related to HHS grants, contracts, and other agreements; and (3) the increase in penalty amounts in the CMPL effected by the Bipartisan Budget Act of 2018.

•The One Big Beautiful Bill Act (OBBBA) was enacted on July 4, 2025. OBBBA includes provisions that will, among other things, expand the orphan drug exception by allowing products with one or more orphan drug designations and one or more approved indications to remain exempt from price negotiation if each indication is for a rare disease or condition and extend the price negotiation program to be effective on the date of non-orphan indication instead of on the date of first approval or licensing. These provisions may impact development processes and price analyses. OBBBA also enacted approximately $1 trillion in Medicaid cuts and imposed additional eligibility requirements. These measures may eliminate Medicaid coverage for up to 10.5 million people, and reduce so-called “dual eligible” enrollment (i.e., enrollment in both Medicare and Medicaid) by 1.3 million people, with less coverage likely to correlate to fewer prescriptions covered by the program and a greater need for manufacturer discounts and expanded patient assistance programs. Although OBBBA established a $50 billion Rural Health Transformation Program (RHTP), known as the “Rural Hospital Fund,” to lessen the impact of Medicaid cuts on rural hospitals, there are concerns that the RHTP may be insufficient to cover the gap, and many hospitals may still close or shift resources to the already troubled 340B Drug Pricing Program, which requires drug manufacturers to sell outpatient drugs at discounted prices to eligible healthcare providers that serve many uninsured and low-income patients. In addition, OBBBA implements a state cost-sharing provision that could place up to 15% of Medicaid costs onto individual states, potentially straining state and local health care budgets and impacting purchasing capabilities. The full impact of OBBBA’s changes to Medicaid on the Company’s business is not yet known.

Over the past several years an increasing number of U.S. states have passed, or are in the process of passing, new regulations designed to increase pricing transparency associated with pharmaceutical manufacturers. Many states have determined that it's in their interest to take legislative action in order to curb drug price increases and to decrease their annual pharmaceutical spending. This momentum is likely to continue in the years ahead. Many of the enacted state price transparency regulations fall into the following categories: advance notice of price increases; price increase reporting; periodic price reports; new drug reporting; price information disclosures to Health Care Professionals and state agencies. The potential penalties for noncompliance vary by state regulation. While certain regulations do not contain specific penalty clauses, most do and can contain penalties that can be significant per violation for noncompliance.

Environmental Matters

Our operations and those of our third-party manufacturers and suppliers are subject to national, state and local environmental laws. We have made, and intend to continue to make, expenditures and undertake efforts to comply with applicable laws. We believe the safety procedures utilized by us for the handling and disposing hazardous materials comply with the standards prescribed by applicable laws and regulations.

Human Capital

Our success begins and ends with our people. Our solid progress to date reflects the talent and hard work of all of our employees. We consider the intellectual capital of our employees to be an essential driver of our business and key to our future prospects. Attracting, developing, and retaining talented people in technical, marketing, sales, research, and other positions is crucial to executing our strategy and our ability to compete effectively. As of December 31, ~~2024~~2025, we employed ~~674~~778 full-time employees in the U.S. None of our employees are represented by a labor union. We consider relations with our employees to be good.

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Talent Acquisition, Retention and Development

Our key human capital objectives are to attract, retain and develop the highest quality talent. We employ various human resource programs in support of these objectives. Our ability to recruit and retain such talent depends on a number of factors, including compensation and benefits, talent development and career opportunities, and the work environment.

We attract and reward our employees by providing market competitive compensation and benefit packages, including incentives and recognition plans that extend to all levels in our organization. To that end, we offer a comprehensive total rewards program aimed at health, home-life, and financial needs of our employees. Our total rewards package includes market-competitive pay, broad-based stock grants, bonuses, healthcare benefits, retirement savings plans, paid time off and family leave, an Employee Assistance Program, and mental health services.

We are committed to the safety, health, and security of our employees. We believe a hazard-free environment is critical for the success of our business. Throughout our operations, we strive to ensure that all our employees have access to safe workplaces that allow them to succeed in their jobs. Our experience and continuing focus on workplace safety has enabled us to preserve business continuity without sacrificing our commitment to keeping our colleagues and workplace visitors safe.

We place a strong value on collaboration and we believe that working together leads to better outcomes for our customers. This extends to the way we treat each other as team members. We strive to create an environment where innovative ideas can flourish by demonstrating respect for each other and valuing the opinions, and viewpoints of employees. We believe a collaborative workplace results in business growth and encourages increased innovation.

In recent years we have been named to a number of best company lists, including the 2021 Forbes Best Small Companies list and the 2020 Best of Rockville – Pharmaceutical Companies list.

Other Information

We are listed on the NASDAQ Stock Exchange under the ticker symbol SUPN. Our principal executive offices are located at 9715 Key West Ave., Rockville, Maryland, 20850. Our website address is www.supernus.com.

We make available free of charge on our website our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and any amendments to those reports, as well as proxy statements, and, from time to time, other documents, as soon as reasonably practicable after we electronically file such material with, or furnish such material to, the U.S. Securities and Exchange Commission (SEC). Through a link on the Investor Relations portion of our website, you can access our filings with the SEC. Information contained on our website is not a part of this Annual Report on Form 10-K.

The SEC also maintains a website at www.sec.gov that contains reports, proxy, and other information statements, and other information regarding issuers, including us, that file electronically with the SEC.

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References to our website and the SEC’s website in this report are provided as a convenience and do not constitute, and should not be viewed as, incorporation by reference of the information contained on, or available through, such websites. Such information should not be considered a part of this report unless otherwise expressly incorporated by reference in this report.

ITEM 1A. RISK FACTORS.

Any investment in our business involves a high degree of risk. Before making an investment decision, you should carefully consider the risks described below, with all of the other information we include in this report and the additional information in the other reports we file with the Securities and Exchange Commission (the "SEC" or the "Commission"). These risks may result in material harm to our business, our financial condition, and the results of our operations. If a material, adverse event was to occur, the market price of our common stock may decline, and you could lose part or all of your investment.

RISK FACTORS SUMMARY

We are subject to a variety of risks and uncertainties, including risks related to our industry and business, risks related to our finances and capital requirements, risks related to securities markets and investment in our stock, and certain general risks, which could have a material adverse effect on our business, financial condition, results of operations and cash flows. The summary below is not exhaustive and is qualified by reference to the full set of risk factors set forth in this "Risk Factors” section.

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Risks Related to Our Industry and Business
•	We are dependent on the commercial success of our products in the U.S.	29
•	If generics or other versions of our products including generics containing one or more of the active pharmaceutical ingredients present in our products are approved and successfully commercialized, our business could be materially harmed.	31
•	We are subject to uncertainty relating to payment or managed care reimbursement policies, which, if not favorable for our products or product candidates, could hinder or prevent our commercial success.	31
•	We depend on wholesalers, distributors, and specialty pharmacies for the distribution of our products. If we lose any of our significant wholesaler, distributor, or specialty pharmacy accounts, our business could be harmed.	33
•	Final marketing approval of any of our product candidates or approval of additional indications for existing products by the FDA or other regulatory authorities may be delayed, limited, or denied, any of which would adversely affect our ability to generate operating revenues.	33
•	We rely on and will continue to rely on outsourcing arrangements for certain of our critical activities, including clinical research of our product candidates, manufacture of our compounds and product candidates, and the manufacture of our commercial products. If we fail to produce our products and product candidates in the volumes that we require on a timely basis or fail to comply with stringent regulations applicable to pharmaceutical drug manufacturers, we may face delays in the development and commercialization of our products and product candidates or be required to withdraw our products from the market.	35
•	If we do not obtain marketing exclusivity for our product candidates, our business may suffer.	36
•	If our competitors develop or market alternatives for the treatment of our target indications, our commercial opportunities will be reduced or eliminated.	37
•	We depend on collaborators to work with us to develop, manufacture and commercialize our products and product candidates. We have in-licensed or acquired a portion of our intellectual property necessary to develop certain of our product candidates. If we fail to comply with our obligations under any of these arrangements, we could lose the benefit of such collaborative relationships, including licenses or intellectual property rights.	39
•	Our failure to successfully develop and market our product candidates would impair our ability to grow.	40
•	Our clinical trials for our product candidates may fail to demonstrate acceptable levels of safety, efficacy, or other requirements, which could prevent or significantly delay regulatory approval.	41
•	Delays or failures in the completion of clinical development of our product candidates would increase our costs, delay, or limit our ability to generate revenues.	42
•	Healthcare reform measures could hinder or prevent the commercial success of our products or product candidates.	44
•	Healthcare cost containment legislation and the failure of third-party payors to provide appropriate levels of coverage and reimbursement for the use of products and treatments facilitated by our products could harm our business and prospects.	46

28Table of Contents ITEM 1A. RISK FACTORS.

Table of ContentsITEM 1A. RISK FACTORS.


		Page
Risks Related to Our Industry and Business
•	We are dependent on the commercial success of our products in the U.S.	35
•	If generics or other versions of our products including generics containing one or more of the active pharmaceutical ingredients present in our products are approved and successfully commercialized, our business could be materially harmed.	37
•	We are subject to uncertainty relating to payment or managed care reimbursement policies, which, if not favorable for our products or product candidates, could hinder or prevent our commercial success.	37
•	We depend on wholesalers, distributors, and specialty pharmacies for the distribution of our products. If we lose any of our significant wholesaler, distributor, or specialty pharmacy accounts, our business could be harmed.	39
•	Final marketing approval of any of our product candidates or approval of additional indications for existing products by the FDA or other regulatory authorities may be delayed, limited, or denied, any of which would adversely affect our ability to generate operating revenues.	39
•	We rely on and will continue to rely on outsourcing arrangements for certain of our critical activities, including clinical research of our product candidates, manufacture of our compounds and product candidates, and the manufacture of our commercial products. If we fail to produce our products and product candidates in the volumes that we require on a timely basis or fail to comply with stringent regulations applicable to pharmaceutical drug manufacturers, we may face delays in the development and commercialization of our products and product candidates or be required to withdraw our products from the market.	41
•	If we do not obtain marketing exclusivity for our product candidates, our business may suffer.	42
•	If our competitors develop or market alternatives for the treatment of our target indications, our commercial opportunities will be reduced or eliminated.	43
•	We depend on collaborators to work with us to develop, manufacture and commercialize our products and product candidates. We have in-licensed or acquired a portion of our intellectual property necessary to develop certain of our product candidates. If we fail to comply with our obligations under any of these arrangements, we could lose the benefit of such collaborative relationships, including licenses or intellectual property rights.	45
•	Our failure to successfully develop and market our product candidates would impair our ability to grow.	47
•	Our clinical trials for our product candidates may fail to demonstrate acceptable levels of safety, efficacy, or other requirements, which could prevent or significantly delay regulatory approval.	48
•	Delays or failures in the completion of clinical development of our product candidates would increase our costs, delay, or limit our ability to generate revenues.	48
•	Healthcare reform measures could hinder or prevent the commercial success of our products or product candidates.	50
•	Healthcare cost containment legislation and the failure of third-party payors to provide appropriate levels of coverage and reimbursement for the use of products and treatments facilitated by our products could harm our business and prospects.	52
•	Any failure to comply with healthcare regulations, including implementation of any change in compliance with healthcare regulations and laws could cause us to incur significant compliance expenses and any failure to comply could subject us to substantial penalties and fines. Our business, operations, and financial condition could be adversely affected.	53
•	We could be involved in additional lawsuits to protect or enforce our patents, which could be expensive, time consuming, distracting, and ultimately unsuccessful.	54
•	Limitations on our patent rights relating to our products and product candidates may limit our ability to prevent third parties from competing with us.	55
•	We face potential litigation and product liability exposures. If successful claims are brought against us, we may incur substantial liabilities.	56
•	Cybersecurity incidents may adversely impact our financial condition, results of operations, and reputation. Security breaches and other disruptions could compromise our information and expose us to liability which would cause our business and reputation to suffer.	58
•	Ongoing legal actions and proceedings could distract management and could result in substantial costs or large judgments against Supernus or one or more of its subsidiaries.	60
•	Our future business prospects for ZURZUVAE® (zuranolone) depend on our ability, with our collaboration partner, Biogen MA Inc., and Biogen International GmbH, or together, Biogen, to successfully commercialize ZURZUVAE® (zuranolone) for the treatment of women with postpartum depression, or PPD, in the U.S. There is no assurance that our commercialization efforts in the U.S. with respect to ZURZUVAE for the treatment of women with PPD will be successful or that we will be able to generate revenues at the levels or on the timing we expect or at levels or on the timing necessary to support our goals.	61

•	Any failure to comply with healthcare regulations, including implementation of any change in compliance with healthcare regulations and laws could cause us to incur significant compliance expenses and any failure to comply could subject us to substantial penalties and fines. Our business, operations, and financial condition could be adversely affected.	47
•	We could be involved in additional lawsuits to protect or enforce our patents, which could be expensive, time consuming, distracting, and ultimately unsuccessful.	50
•	Limitations on our patent rights relating to our products and product candidates may limit our ability to prevent third parties from competing with us.	51
•	We face potential litigation and product liability exposures. If successful claims are brought against us, we may incur substantial liabilities.	52
•	Cybersecurity incidents may adversely impact our financial condition, results of operations, and reputation. Security breaches and other disruptions could compromise our information and expose us to liability which would cause our business and reputation to suffer.	53
•	Compliance with the terms and conditions of our Corporate Integrity Agreement requires significant resources and management time and, if we fail to comply, we could be subject to penalties or, under certain circumstances, excluded from government healthcare programs, which would materially adversely affect our business.	56
Risks Related to Our Finances and Capital Requirements
•	Our operating results may fluctuate significantly.	56
•	Our ability to use our net operating loss carryforwards and other tax attributes may be limited or may expire prior to utilization.	57
•	We have and may further expand our business through acquisitions of new product lines or businesses, which expose us to various risks, including difficulties in integrating acquisitions. Our recent acquisitions pose certain incremental risks to the Company.	58
•	Any impairment in the value of our intangible assets, including goodwill, would negatively affect our operating results and total capitalization.	60
Risks Related to Securities Markets and Investment in Our Stock
•	The issuance of additional shares of our common stock, or instruments convertible into or rights to acquire shares or our common stock, or market sales of our common stock, could affect the market price of our common stock.	61
•	Anti-takeover provisions under our charter documents and Delaware law could delay or prevent a change of control, which could negatively impact the market price of our common stock.	62
General Risk Factors
•	Obtaining and maintaining patent protection depends on compliance with various procedural, document submission, fee payment, and other requirements imposed by governmental patent agencies. Our patent protection could be reduced or eliminated for non-compliance with these requirements.	64
•	Our insurance coverage may not be sufficient to cover our legal claims or other losses that we may incur in the future.	64
•	Our operations rely on sophisticated information technology, systems, and infrastructure, a disruption of which could harm our operations.	65

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Risks Related to Our Finances and Capital Requirements
•	Tariffs may increase our costs.	62
•	Our operating results may fluctuate significantly.	62
•	Our ability to use our net operating loss carryforwards and other tax attributes may be limited or may expire prior to utilization.	63
•	We have and may further expand our business through acquisitions of new product lines or businesses, which expose us to various risks, including difficulties in integrating acquisitions. Our recent acquisitions pose certain incremental risks to the Company.	64
•	Any impairment in the value of our intangible assets, including goodwill, would negatively affect our operating results and total capitalization.	66

Risks Related to Securities Markets and Investment in Our Stock
•	The issuance of additional shares of our common stock, or instruments convertible into or rights to acquire shares or our common stock, or market sales of our common stock, could affect the market price of our common stock.	67
•	Anti-takeover provisions under our charter documents and Delaware law could delay or prevent a change of control, which could negatively impact the market price of our common stock.	68

General Risk Factors
•	Obtaining and maintaining patent protection depends on compliance with various procedural, document submission, fee payment, and other requirements imposed by governmental patent agencies. Our patent protection could be reduced or eliminated for non-compliance with these requirements.	70
•	Our insurance coverage may not be sufficient to cover our legal claims or other losses that we may incur in the future.	70
•	Our operations rely on sophisticated information technology, systems, and infrastructure, a disruption of which could harm our operations.	70

Risks Related to Our Industry and Business

We are dependent on the commercial success of our products in the U.S.

Our financial performance, including our ability to replace revenue and income lost to generic products and other competitors as well as to grow our business, depends heavily on the commercial success of our products. A substantial amount of our resources is focused on generating, maintaining and/or expanding the revenue generated by our approved products in the U.S. Our major products Qelbree®, GOCOVRI®, Oxtellar XR®, APOKYN®, and ~~APOKYN~~ZURZUVAE®, represented approximately 3849%, 2023%, 166%, and 128% of our total net revenues for the year ended December 31, ~~2024~~2025, respectively. If any of our major products were to become subject to problems, such as changes in prescription growth rates, unexpected side effects, loss of intellectual property protection, supply chain or product supply shortages, regulatory proceedings, changes in labeling, publicity adversely affecting doctor or patient confidence in such product, material product liability litigation, pressure from new or existing competitive products, or adverse changes in coverage under managed care programs, the adverse impact on our revenue and profit could be significant. AsFor ~~noted~~example, in November 2025 we announced that supplier constraints were impacting our ability to fully meet demand for ONAPGO and that this required pausing delivery of the product to patients who had not yet started ONAPGO, resulting in an adverse impact on our revenue and profit during the fourth quarter of 2025. In February 2026, we announced that we have made progress securing additional product supply of ONAPGO from the current supplier and as a result has resumed new patient initiation. In addition, we are working with a second supplier that is expected to begin supplying ONAPGO in 2027. In addition, our revenue and profit could be significantly impacted by the timing and rate of commercial acceptance of key new products.

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the "Business" section of this report, sales of a generic version of Trokendi XR® and Oxteller XR® began in January 2023 and September 2024, respectively. Those competitive products have significantly impacted the sales of Trokendi XR and Oxtellar XR, resulting in an adverse impact on our revenue and profit. In addition, our revenue and profit could be significantly impacted by the timing and rate of commercial acceptance of key new products.

Our ability to generate significant product revenue from sales of our products in the near term will depend on, among other things, our ability to:

•Defend our patents, intellectual property, and products from the competition, both branded and generic;

•Maintain commercial manufacturing arrangements with third-party manufacturers;

•Produce, through a validated process, sufficiently large quantities of our products to meet demand;

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ITEM 1A. RISK FACTORS.

•Continue to maintain a wide variety of internal sales, distribution, and marketing capabilities, sufficient to sustain and grow revenue;

•Continue to maintain and grow widespread acceptance of our products from physicians, health care payors, patients, pharmacists, and the medical community;

•Properly price and obtain adequate reimbursement coverage of these products by governmental authorities, private health insurers, managed care organizations, and other third-party payors;

•Maintain compliance with ongoing FDA labeling, packaging, storage, advertising, promotion, recordkeeping, safety, and other post-market requirements;

•Obtain approval from the FDA to expand the labeling of our approved products for additional indications;

•Maintain compliance with the Drug Enforcement Administration’s regulation of certain controlled substances, such as ZURZUVAE;

•Adequately protect against and effectively respond to any claims by holders of patents and other IP rights alleging that our products infringe their rights; and

•Adequately protect against and effectively respond to any unanticipated adverse effects or unfavorable publicity that develops with respect to our products, as well as respond to the emergence of new or existing competitive products, which may be proven to be more clinically effective and cost-effective.

There are no guarantees that we will be successful in completing these tasks. We will need to continue investing substantial financial and management resources to maintain our commercial sales and marketing infrastructure and recruit and train qualified marketing, sales, and other personnel.

Sales of our products may slow for a variety of reasons, including competing products or safety issues. Any increase in sales of our products will be dependent on several factors, including our ability to educate physicians, to increase physician awareness, and physician acceptance of the benefits and cost-effectiveness of our products relative to competing products.

Our ability to increase market acceptance of any of our products or to gain market acceptance of approved product candidates among physicians, patients, health care payors, and the medical community will depend on a number of factors, including:

•Acceptable evidence of safety and efficacy;

•Relative convenience and ease of administration;

•Prevalence, nature, and severity of any adverse side effects;

•Availability of alternative treatments, including branded and generic products; and

•Pricing and cost effectiveness.

Further, our products are subject to continual review by the FDA. We cannot provide assurance that newly discovered or reported safety issues would not arise. With the use of any marketed drug by a broader patient population, serious adverse events may occur from time to time that initially do not appear to be related to the drug itself. Any safety issues could cause us to suspend or to cease marketing of our approved products; cause us to modify how we market our approved products; subject us to substantial liabilities; and adversely affect our revenues and financial condition. In the event of a withdrawal of any of our products from the market, our revenues would decline significantly, and our business would be seriously harmed and could fail.

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substantial liabilities; and adversely affect our revenues and financial condition. In the event of a withdrawal of any of our products from the market, our revenues would decline significantly, and our business would be seriously harmed and could fail.

In addition, we have expressed certain long term revenue expectations. If we are not successful in broadening and/or maintaining the current commercial acceptance of our products, such that we cannot achieve those revenue expectations with respect to such products, this could result in a material adverse impact on our anticipated revenue, earnings, and liquidity.

If generics or other versions of our products including generics containing one or more of the active pharmaceutical ingredients present in our products are approved and successfully commercialized, our business could be materially harmed.36

~~Third~~Table ~~parties have, and in the future may, receive approval to manufacture and market their own versions~~ of ~~products~~Contents ~~containing~~ITEM ~~one or more of the active pharmaceutical ingredients present in our products in the U~~1A.S. ~~For~~RISK ~~example, Upsher-Smith launched Qudexy XR (extended-release topiramate) and a branded generic version of Qudexy XR in 2014~~FACTORS. Upsher-Smith also entered into a settlement with two generic companies to launch a generic to Qudexy XR in 2020. In February 2021, one of the generic companies, Glenmark, entered the U.S. market with its own therapeutically equivalent generic products to Qudexy XR.

~~The~~If ~~Company~~other ~~has~~versions ~~entered~~of ~~into~~our ~~settlement~~products, ~~and~~including ~~license~~but ~~agreements~~not ~~with~~limited ~~third~~to ~~parties,~~generics ~~which~~containing ~~permit~~one ~~the~~or ~~sale~~more of ~~generic~~the ~~versions~~active ofpharmaceutical ~~Trokendi~~ingredients XRpresent ~~and~~in ~~Oxtellar~~our XRproducts onare ~~January~~approved ~~2023~~ and ~~September~~successfully ~~2024~~commercialized, ~~respectively.~~or ~~Sales~~if ofproducts ~~generic~~are ~~versions of Trokendi XR and Oxtellar XR began in 2023 and 2024~~developed, ~~respectively.~~approved ~~The Company has also entered into settlement~~ and ~~license~~successfully ~~agreements~~commercialized ~~with~~which ~~third~~provide ~~parties~~similar ~~permitting~~benefits ~~the sale~~ of ~~the~~treatment ~~first~~for ~~generic version of XADAGO beginning in December 2027~~patients, ~~or sooner under certain conditions. We have the right to defend~~ our ~~products~~business ~~against~~could ~~third~~be ~~parties~~materially ~~who may infringe or are infringing our patents~~harmed.

Third parties have, and in the future may, receive approval to manufacture and market their own ~~products,~~versions ~~including~~of ~~generics~~products containing ~~apomorphine~~one ~~hydrochloride,~~or ~~for~~more ~~the treatment~~ of ~~Parkinson’s Disease in~~ the ~~U.S.~~active ~~For~~pharmaceutical ~~example,~~ingredients inpresent ~~2019, Acorda Therapeutics, Inc. launched Inbrija (acquired by Merz Pharmaceuticals, LLC~~ in ~~July~~our ~~2024),~~products an inhalable form of levodopa and Sunovion Pharmaceuticals, Inc. (Sunovion, a subsidiary of Sumitomo Dainippon Pharma Co. Ltd) launched KYNMOBI, a sublingual film formulation of apomorphine hydrochloride, in ~~2020 (later withdrawn from~~ the U.S. in June 2023). In February 2022, the FDA approved the first generic containing apomorphine hydrochloride to treat hypomobility "OFF" episodes ("end-of-dose wearing off" and unpredictable "ON/OFF" episodes) associated with advanced Parkinson's Disease. This approval was for the drug cartridges only, which according to the FDA’s press release are to be used with the APOKYN pen, the brand-name pen injector, as the generic manufacturer did not seek approval of its own pen. Patients treated with generic apomorphine hydrochloride will need to separately obtain the APOKYN pen. The success of these products and the entry of new products could adversely impact the sales of APOKYN.

ToThe ~~the~~Company ~~extent~~has ~~any~~entered into settlement and license agreements with third ~~party~~parties, iswhich ~~successful~~permit inthe ~~obtaining~~sale ~~approval~~of togeneric ~~manufacture~~versions of Trokendi XR and ~~market~~Oxtellar aXR ~~generic~~beginning oron ~~its~~January ~~own~~2023 ~~version~~and ofSeptember a2024, ~~product~~respectively. ~~containing~~Sales ~~one~~of orgeneric ~~more~~versions of ~~the~~Trokendi ~~active~~XR ~~pharmaceutical~~and ~~ingredients~~Oxtellar ~~present~~XR began in ~~our~~2023 ~~products~~and in2024, respectively. The Company has also entered into settlement and license agreements with third parties permitting the ~~U.S.,~~sale weof ~~may~~the ~~not~~first begeneric ~~able~~version toof ~~prospectively~~XADAGO ~~realize~~beginning ~~revenues~~in ~~from~~December ~~such~~2027, ~~products~~or sooner under certain conditions. ~~Accordingly,~~We have the right to defend our ~~business~~products ~~and~~against ~~growth~~third ~~prospects~~parties ~~could~~who bemay ~~materially~~infringe ~~impaired.~~or are infringing our patents.

Third parties have, and in the future may, receive approval to manufacture and market their own products, including but not limited to generics containing apomorphine hydrochloride, for the treatment of Parkinson’s Disease in the U.S. For example, in 2019, Acorda Therapeutics, Inc. launched Inbrija (acquired by Merz Pharmaceuticals, LLC in July 2024), an inhalable form of levodopa and Sunovion Pharmaceuticals, Inc. (Sunovion, a subsidiary of Sumitomo Dainippon Pharma Co. Ltd) launched KYNMOBI, a sublingual film formulation of apomorphine hydrochloride, in 2020 (later withdrawn from the U.S. in June 2023). In February 2022, the FDA approved the first generic containing apomorphine hydrochloride to treat hypomobility "OFF" episodes ("end-of-dose wearing off" and unpredictable "ON/OFF" episodes) associated with advanced Parkinson's Disease. This approval was for the drug cartridges only, which according to the FDA’s press release are to be used with the APOKYN pen, the brand-name pen injector, as the generic manufacturer did not seek approval of its own pen. Patients treated with generic apomorphine hydrochloride will need to separately obtain the APOKYN pen.

Third parties have developed, received FDA approval and successfully commercialized longer-lasting extended relief levodopa/carbidopa products, which are impacting sales of APOKYN because they reduce the number of times per day a given patient may need to use an off-episode product like APOKYN.

Third parties have also developed, received FDA approval and successfully commercialized products that compete with ONAPGO. For example, in 2024, AbbVie launched Vyalev, a treatment for advanced PD that utilizes a wearable pump to provide a continuous infusion of foscarbidopa and foslevodopa.

The success of these products and the entry of new products could adversely impact the sales of ONAPGO and APOKYN.

To the extent any third party is successful in obtaining approval to manufacture and market a generic or its own version of a product containing one or more of the active pharmaceutical ingredients present in our products in the U.S., we may not be able to prospectively realize revenues from such products and sales of such products may occur in place of sales of our products. Accordingly, our business and growth prospects could be materially impaired.

We are subject to uncertainty relating to payment or managed care reimbursement policies, which, if not favorable for our products or product candidates, could hinder or prevent our commercial success.

Our business is operating in an ever more challenging environment, with significant economic pressures exerted by federal and state governments, insurers, and private payors on the pricing of our products, affecting our ability to obtain and/or maintain satisfactory rates of reimbursement for our products. The U.S. federal and state governments and private payors are under intense pressure to control healthcare spending even more tightly than in the past. These pressures are further compounded by consolidation among distributors, retailers, private insurers, managed care organizations, and other private payors, resulting in an increase in their negotiating power, particularly with respect to our products. In addition, these pressures are intensified by increased, adverse publicity about pricing for pharmaceuticals. These prices are sometimes characterized as excessive, leading to government actions, including investigations, and legal proceedings regarding pharmaceutical pricing practices.

Our ability, or our collaborators' ability, to successfully commercialize our products and product candidates, including Qelbree and ONAPGO (formerly known as SPN-830), will depend in part on the coverage and reimbursement levels set by governmental authorities, private health insurers, managed care organizations, and other third-party payors.

As a threshold for coverage and reimbursement, third-party payors require that drug products be approved for marketing by the FDA. Third-party payors are increasingly challenging the effectiveness of and prices charged for medical products and services. Government authorities and third-party payors have attempted to control costs, in some instances, by limiting coverage, by limiting the amount of reimbursement for particular medications, or by encouraging the use of lower-cost generic products.

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services. Government authorities and third-party payors have attempted to control costs, in some instances, by limiting coverage, by limiting the amount of reimbursement for particular medications, or by encouraging the use of lower-cost generic products.

We cannot be sure that reimbursement will be available for any of the products that we develop and, if reimbursement is available, the level of reimbursement. Moreover, that level of reimbursement may change over time as a result of requests from payors for higher levels of fees. Reduced or partial payment, or reduced reimbursement coverage, could make our products or product candidates less attractive to patients and prescribing physicians. We also may be required to sell our products or product candidates at a significant discount, which would adversely affect our ability to realize an appropriate return on our investment in our products or product candidates or to maintain profitability. Our business would also be adversely affected if private insurers, managed care organizations, the Medicare program, or other reimbursing bodies or payors limit the indications for which our products or product candidates will be reimbursed.

We expect that private insurers and managed care organizations will consider the efficacy, cost effectiveness, and safety of our products or product candidates in determining whether to approve reimbursement for such products or product candidates and to what extent they will provide reimbursement. Moreover, they will consider the efficacy and cost effectiveness of comparable or competitive products, including generic products, in making reimbursement decisions for our products. Because each third-party payor individually approves payment or reimbursement, obtaining these approvals can be a time consuming and expensive process, requiring us to provide scientific or clinical support for the use of each of our products or product candidates separately to each third-party payor. In some cases, it could take months or years before a particular private insurer or managed care organization reviews a particular product. Prior to that time, reimbursement may be negligible. We may ultimately be unsuccessful in obtaining coverage. In addition, our competitors may have more extensive existing business relationships with third-party payors that could adversely impact the coverage for our products.

Our business would be materially and adversely affected if we do not receive reimbursement for our products or product candidates from private insurers in a timely fashion or on a satisfactory basis. Our products and product candidates may not be considered cost-effective, and coverage and reimbursement may not be available or economically sufficient to allow us to sell our products or product candidates on a profitable basis.

In addition, many managed care organizations negotiate the reimbursement price of products through the use of formularies, which establish reimbursement levels. Exclusion of a product from a formulary, as has occurred in the past, can lead to sharply reduced usage in the managed care organization's patient population because reimbursement is limited and/or negligible. If our products are not included within an adequate number of managed care formularies or reimbursed at adequate levels, or if those policies increasingly favor generic products, our market share and gross margins could be negatively affected. This would have a material adverse effect on our overall business and financial condition.

There has been increasing ~~legislative and enforcement~~ interest in the U.S. from both the executive and legislative branches with respect to specialty drug pricing practices. Specifically, there have been several recent U.S. Congressional inquiries and proposed federal and state legislative initiatives designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under the Medicare program, to review the relationship between pricing and manufacturer patient programs, and to reform government reimbursement methodologies for drugs. Additionally, several Executive Orders have been issued generally aimed at lowering the price of certain pharmaceutical products in the United States. For additional information, see "Healthcare cost containment legislation and the failure of third-party payors to provide appropriate levels of coverage and reimbursement for the use of products and treatments facilitated by our products could harm our business and prospects." We expect to experience pricing pressures in connection with the sale of any of our products and product candidates due to the trend toward managed healthcare, the increasing influence of health maintenance organizations, additional cost containment initiatives, and additional legislative changes.

In some foreign jurisdictions, where certain of our products are sold by third parties pursuant to license agreements with us, particularly Canada and Europe, the pricing of prescription pharmaceuticals is subject to strict governmental control. In these countries, pricing negotiations with governmental authorities can take 6six to 12twelve months, or longer, after the receipt of regulatory approval and product launch. To obtain favorable reimbursement for the indications sought, or to obtain pricing approval in some countries, we may be required to conduct a clinical trial that compares the cost-effectiveness of our products or product candidates, if approved, to other available therapies. If reimbursement for our products or product candidates is unavailable in any country in which reimbursement is sought or is limited in scope or amount, or if pricing is set at unsatisfactory levels, our business could be materially harmed and unprofitable.

As evidenced by the passage of the American Rescue Plan Act of 2021 and Inflation Reduction Act of 2022, discussed in greater detail below, and the President's Executive Orders in 2025, we expect these challenges to continue and to potentially intensify during ~~2025~~2026, as political pressures mount, and healthcare payors, including government-controlled health authorities, insurance companies, and managed care organizations, step up initiatives to reduce the overall cost of healthcare, restrict access to higher-priced new medicines, increase the use of generic products and impose overall price cuts. Such pressures could have a material adverse impact on our business, financial condition, and results of operations.

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insurance companies, and managed care organizations, step up initiatives to reduce the overall cost of healthcare, restrict access to higher-priced new medicines, increase the use of generic products and impose overall price cuts. Such pressures could have a material adverse impact on our business, financial condition, and results of operations.

We depend on wholesalers, distributors, and specialty pharmacies for the distribution of our products. If we lose any of our significant wholesaler, distributor, or specialty pharmacy accounts, our business could be harmed.

The majority of our product sales are to pharmaceutical wholesalers, specialty pharmacies, and distributors who, in turn, sell our products to pharmacies, hospitals, and other customers, including federal and state entities. The majority of sales of Qelbree, Oxtellar XR, Trokendi XR, XADAGO, and MYOBLOC are made to wholesalers and distributors. In addition, MYOBLOC is available for direct purchase by physicians and hospitals. The majority of sales of GOCOVRI, APOKYN, ONAPGO, and ~~APOKYN~~ZURZUVAE are made to specialty pharmacies.

The loss of any of these wholesale pharmaceutical distributors or wholesale and specialty pharmacy accounts, or a material reduction in their purchases, could have a material adverse effect on our business, results of operations, financial condition, and prospects. In addition, these wholesale customers comprise a significant part of the distribution network for pharmaceutical products in the U.S. This distribution network has undergone and may continue to undergo significant consolidation marked by mergers and acquisitions. As a result, a small number of large wholesale distributors control a significant share of the market.

Consolidation of drug wholesalers has increased. This may result in increased competition and pricing pressures on pharmaceutical products. We cannot assure you that we can manage these pricing pressures or that wholesaler purchases will not fluctuate unexpectedly from period to period.

Sales of our products can be greatly affected by the inventory levels that our respective wholesalers, specialty pharmacies, and distributors carry. We monitor wholesalers, specialty pharmacies, and distributor inventory of our products using a combination of methods. Pursuant to distribution service agreements with our three largest wholesale customers, we receive product inventory reports. For other wholesalers where we do not receive inventory reports, our estimates of wholesaler inventories may differ significantly from actual inventory levels. Significant differences between actual and estimated inventory levels may result in excessive stocking, resulting in our holding substantial quantities of unsold inventory, or, alternatively, inadequate supplies of product in the distribution channels. This could result in an inability to support sales at the retail level. These changes may cause our revenues to fluctuate significantly from quarter to quarter and, in some cases, may cause our operating results for a particular quarter to be below expectations.

At times, wholesalers and distributors may increase inventory levels in response to anticipated price increases, resulting in both greater wholesaler purchases prior to the anticipated price increase and in reduced wholesaler purchases in later quarters. Accordingly, this may cause substantial fluctuations in our results of operations from period to period. If our financial results are below expectations for a particular period, the market price of our common stock may drop significantly.

We may not be able to effectively market and sell our product candidates, if approved, in the U.S.

We plan on expanding our sales and marketing capabilities in the U.S. to commercialize new product candidates if approved. This will require investing significant amounts of financial and management resources. If we are unable to establish and maintain adequate sales and marketing capabilities for new product candidates or do so in a timely manner, we may not be able to generate sufficient product revenues from our product candidates to be profitable. The cost of establishing and maintaining such marketing and sales capabilities may not be economically justifiable in light of the revenues generated by any of our product candidates. With the approval of a new product candidate, we may re-prioritize our marketing and sales efforts, including reassigning our sales representatives who support existing products to devote their full efforts to the launch of the new product candidate. This could have a detrimental impact on the future sales performance of existing products.

Final marketing approval of any of our product candidates or approval of additional indications for existing products by the FDA or other regulatory authorities may be delayed, limited, or denied, any of which would adversely affect our ability to generate operating revenues.

We are dependent on obtaining regulatory approval of our product candidates and approval for additional indications for existing products. Our business depends on successful clinical development i.e., successful completion of clinical trials and completion of requisite manufacturing information. We are not permitted to market ~~any~~a ~~of our~~ product ~~candidates~~candidate in the U.S. until we receive approval of an NDA from the FDA or market in any foreign jurisdiction until we receive approval from the requisite authority. Satisfaction of regulatory requirements typically takes many years, is dependent upon the type, complexity, and novelty of the product, and requires the expenditure of substantial resources. We cannot predict whether or when we will obtain regulatory

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receive approval of an NDA from the FDA or market in any foreign jurisdiction until we receive approval from the requisite authority. Satisfaction of regulatory requirements typically takes many years, is dependent upon the type, complexity, and novelty of the product candidate, and requires the expenditure of substantial resources. We cannot predict whether or when we will obtain regulatory approval to commercialize our product candidates. We cannot, therefore, predict the timing of any future revenues from these product candidates.

The FDA has substantial discretion in the drug approval process, including the ability to delay, limit or deny approval of a product candidate or deny a prior approval supplement for many reasons. For example, the FDA

•Could reject or delay the marketing application for an NCE;

•Could determine that we cannot rely on Section 505(b)(2) for any approval of our product candidates;

•Could determine that the information provided by us was inadequate, contained clinical deficiencies, or otherwise failed to demonstrate the safety and effectiveness of any of our product candidates for a specific indication;

•May not find the data from bioequivalence studies and/or clinical trials sufficient to support the submission of an NDA or to obtain marketing approval in the U.S.;

•May find the clinical and other benefits of our product candidates do not outweigh their safety risks;

•May disagree with our trial design or our interpretation of data from preclinical studies, bioequivalence studies, and/or clinical trials, or may change the requirements for approval even after they have reviewed and commented on the design for our trials; the outcome and measurement scale used in the trials; or the clinical protocols whether with or without a special protocol assessment process;

•May determine that we have identified the wrong reference listed drug or drugs, or that approval of our Section 505(b)(2) application of our product candidate is blocked by patent or non-patent exclusivity of the reference listed drug or drugs;

•May identify deficiencies in the manufacturing processes or facilities of third-party manufacturers with which we enter into agreements for the supply of raw materials, including the active pharmaceutical ingredient (API) or formulated product used in our product candidates, wherein those deficiencies may result in a delay in obtaining FDA approval or in an interruption in the ability to supply product;

•Could reject or delay approval of a "prior approval supplement" required prior to distribution of the drug product made using changes that may impact product quality, identity strength, purity, or potency (i.e., major changes);

•May approve our product candidates for fewer or more limited indications than we request, or may grant approval contingent on the performance of costly post-approval clinical trials;

•May change their approval policies or adopt new regulations;

•May not approve the labeling claims that we believe are necessary or desirable for the successful commercialization of our product candidates or may approve them with warnings and precautions that could limit the acceptance of our product candidates and their commercial success; or

•May not approve the addition of new indications to the label of our existing products.

Notwithstanding the approval of many products by the FDA pursuant to Sections 505(b)(1) and 505(b)(2), over the last few years, some pharmaceutical companies and others have objected to the FDA's interpretation of Section 505(b)(2). If the FDA changes its interpretation of Section 505(b)(2), or if the FDA's interpretation is successfully challenged in court, then this could delay or even prevent the FDA from approving any Section 505(b)(2) application that we submit. Any failure to obtain regulatory approval of our product candidates would eliminate our ability to generate revenues for that candidate. Any failure to obtain such approval for all of the indications and labeling claims we deem desirable could reduce our potential revenues.

The process of obtaining regulatory clearances or approvals to market a medical device can be costly and time consuming. We may not be able to obtain these clearances or approvals on a timely basis, if at all. The FDA exercises significant discretion over the regulation of combination products, including drug and device components in a combination product.

The FDA could in the future require additional regulation under the medical device provisions of the FDCA. We must comply with the QSR, which sets forth the FDA's cGMP, requirements for medical devices, and other applicable government ~~regulations and corresponding foreign standards for drug cGMPs. If we fail to comply with these regulations, it could have a material adverse effect on our business and financial condition.~~

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Inregulations ~~February~~and ~~2025,~~corresponding ~~the~~foreign ~~FDA~~standards ~~approved~~for ~~ONAPGO~~drug ~~(apomorphine~~cGMPs. ~~hydrochloride)~~If ~~injection~~we ~~(formerly~~fail ~~SPN-830),~~to ascomply ~~the~~with ~~first~~these ~~and~~regulations, ~~only~~then ~~subcutaneous~~it ~~apomorphine~~could ~~infusion~~have ~~device~~a ~~for~~material ~~the~~adverse ~~treatment~~effect ofon ~~motor~~our ~~fluctuations~~business inand ~~adults~~financial ~~with advanced PD~~condition. ~~See Item 1. Business for further information.~~

We rely on and will continue to rely on outsourcing arrangements for certain of our critical activities, including clinical research of our product candidates, manufacture of our compounds and product candidates, and the manufacture of our commercial products. If we fail to produce our products and product candidates in the volumes that we require on a timely basis or fail to comply with stringent regulations applicable to pharmaceutical drug manufacturers, we may face delays in the development and commercialization of our products and product candidates or be required to withdraw our products from the market.

We rely on outsourcing arrangements for some of our critical activities, including manufacturing, preclinical and clinical research, data collection and analysis, and electronic submission of regulatory filings. We ~~may~~ have limited control over third parties, and we cannot guarantee that they will perform their obligations in an effective, competent, and timely manner. For example, in November 2025, we announced that due to stronger than expected demand for ONAPGO, supplier constraints are impacting the Company's ability to fully meet demand. In February 2026, we announced that we have made progress securing additional product supply of ONAPGO from the current supplier and as a result has resumed new patient initiation. In addition, we are working with a second supplier that is expected to begin supplying ONAPGO in 2027. Our reliance on third parties, including third-party Clinical Research Organizations (CROs) and CMOs, entails risks including, but not limited to:

•Non-compliance by third parties with regulatory and quality control standards;

•Sanctions imposed by regulatory authorities if materials supplied or manufactured by a third party supplier or manufacturer fail to comply with applicable regulatory standards;

•Possible breach of the agreements by the CROs or CMOs because of factors beyond our control, insolvency or other financial difficulties of any of these third parties; labor unrest; natural disasters; or other factors adversely affecting their ability to conduct their business; and

•Termination or non-renewal of an agreement by a third party at a time that is inconvenient for us and for reasons not entirely under our control.

We do not currently own or operate manufacturing facilities for the commercial production of any of our products or for production of clinical supplies of our product candidates, nor do we have plans to do so in the future. We currently depend on third-party ~~clinical manufacturing organizations (~~CMOs), who offer a comprehensive range of contract manufacturing and packaging services, in various countries for the supply of API for our products and product candidates, including raw materials and drug substances for our preclinical research and clinical trials. For most of our products and product candidates, we rely on single source suppliers to produce and package final dosage forms for our products and raw materials, including API. If any of these vendors are unable to perform their obligations to us, including due to violations of the FDA's requirements, our ability to meet regulatory requirements, projected timelines, product demand, and necessary quality standards for the development or commercialization of products would be adversely affected. Further, if we were required to change suppliers, it could result in substantial delays in our regulatory approval efforts, significantly increase our costs, and delay generation of revenues. Accordingly, the loss of any of our current or future third-party manufacturers or suppliers could have a material adverse effect on our business, results of operations, financial condition, and business prospects.

There is a risk that supplies of our products or product candidates may be significantly delayed by or may become unavailable as a result of manufacturing, equipment, process, supply chain or business-related issues or geopolitical events affecting our suppliers. At this time while we do not know of any geopolitical events impacting our supply chain, we cannot determine the impact of current or future geopolitical events which may ultimately have an impact on our supply chains or may create other unforeseen consequences affecting us or our suppliers. Any future curtailment in the availability of raw materials or finished goods could result in production or other delays, resulting adverse business effects. In addition, because regulatory authorities must generally approve or grant a waiver with respect to raw material sources for pharmaceutical products, changes in raw material suppliers may result in production delays or higher raw material costs. We may also encounter similar risks with the other products and product candidates where raw materials or finished goods are purchased from suppliers outside the U.S., as is the case for example for ONAPGO (formerly known as SPN-830), Qelbree, APOKYN, XADAGO, and MYOBLOC where various suppliers are based in Europe, and ZURZUVAE where suppliers are based in Asia.

The manufacture of pharmaceutical products requires significant expertise and capital investment, including the development of advanced manufacturing techniques and process controls. Pharmaceutical companies and their suppliers often encounter difficulties in manufacturing, particularly in scaling up the production of their products. These problems can adversely affect production costs and yields, quality control, the stability of the product and quality assurance testing, as well as compliance with federal, state, and foreign regulations. If we are unable to demonstrate stability in accordance with commercial requirements, or if our manufacturers were to encounter difficulties or otherwise fail to comply with their obligations to us, our ability to obtain

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with federal, state, and foreign regulations. If we are unable to demonstrate stability in accordance with commercial requirements, or if our manufacturers were to encounter difficulties or otherwise fail to comply with their obligations to us, our ability to obtain or maintain FDA approval and to market our products and product candidates, respectively, would be jeopardized. In addition, any delay or interruption in producing clinical trial supplies could delay or prohibit the completion of our clinical trials, increase the costs associated with conducting our clinical trials and, depending upon the period of delay, require us to commence new trials at the significant additional expense or to terminate a trial.

Manufacturers of pharmaceutical products need to comply with cGMP requirements and other requirements enforced by the FDA, including electronic tracking and submission. These requirements include quality control, quality assurance, and the maintenance of records and documentation. Manufacturers of our products and product candidates may be unable to comply with all cGMP requirements and other FDA and similar foreign regulatory requirements. Failure to comply with these requirements may result in fines and civil penalties, suspension of production, suspension or delay in product approval, product seizure or recall, or withdrawal of product approval. If the safety of any of our products or product candidates is compromised due to failure to adhere to applicable laws or for other reasons, we may not be able to obtain regulatory approval for such product candidates or to successfully commercialize such products. We may be held liable for any injuries sustained as a result. Any of these factors could cause a delay in clinical development, regulatory submissions, approvals, or commercialization of our product candidates, entail higher costs, or result in our being unable to effectively commercialize our product candidates. Furthermore, if we fail to obtain the required commercial quantities on a timely basis from our suppliers and at commercially reasonable prices, we may be unable to meet the demand for our approved products or may not be able to sell our products profitably.

If we do not obtain marketing exclusivity for our product candidates, our business may suffer.

Under the Hatch-Waxman Amendments, three years of marketing exclusivity may be granted for the approval of NDAs and sNDAs, including Section 505(b)(2) applications, for, among other things, new indications, dosage forms, routes of administration, strengths, or for a new use of an existing drug. If the clinical investigations that were conducted or sponsored by the applicant are determined by the FDA to be essential to the approval of the application, the FDA may grant exclusivity for the product, sometimes referred to as clinical investigation exclusivity. This prevents the FDA from approving an application under Section 505(b)(2) for the same conditions of use for new clinical investigations prior to the expiration of three years from the date of approval. Such exclusivity, however, would not prevent the approval of another application if the applicant submits a full NDA and has conducted its own adequate, well-controlled clinical trials, demonstrating safety and efficacy. It would not prevent approval of a generic product or Section 505(b)(2) product that did not incorporate the exclusivity-protected changes of the approved drug product.

Under the Hatch-Waxman Amendments, newly-approved drugs and indications may also benefit from a statutory period of non-patent marketing exclusivity. The Hatch-Waxman Amendments provide five-year marketing exclusivity to the first applicant to gain the approval of an NDA for an NCE. This would be the case if the FDA had not previously approved any other drug containing the same API or active moiety, which is the molecule responsible for the action of the drug substance. Although protection under the Hatch-Waxman Amendments will not prevent the submission or approval of another full NDA, such an NDA applicant would be required to conduct its own preclinical and adequate, well-controlled clinical trials to demonstrate safety and effectiveness.

Currently, the Company has a five-year marketing exclusivity period for Qelbree.

If we are unable to obtain marketing exclusivity for our subsequent product candidates, then our competitors may obtain approval for competing products more easily than if we had such marketing exclusivity. In such an event, our future revenues from such product candidates could be reduced materially.

If the FDA or other applicable regulatory authorities approve generic products that compete with any of our products or product candidates, the sales of our products or the commercial success of our product candidates would be adversely affected.

Once an NDA, including a Section 505(b)(2) application, is approved, the product covered thereby becomes a listed drug, which can be cited by potential competitors in support of approval of an ANDA. FDCA, FDA regulations and other applicable regulations and policies provide incentives to manufacturers to create modified, non-infringing versions of a drug to facilitate the approval of an ANDA or other application for generic substitutes. These manufacturers might only be required to conduct a relatively inexpensive study to show that their product has the same active ingredient(s), dosage form, strength, route of administration, and conditions of use or labeling, as our product or product candidate and that the generic product is bioequivalent to our product. Bioequivalence implies that a product is absorbed in the body at the same rate and to the same extent as our product or product candidate. These generic equivalents, which must meet the same quality standards as branded pharmaceuticals, would be significantly less costly than ours to bring to market. Companies that produce generic equivalents are generally able to offer their products at significantly lower prices. Thus, regardless of the regulatory approval pathway, after the introduction of a generic competitor, a significant percentage of the sales of any branded product are typically lost to the generic product through

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offer their products at significantly lower prices. Thus, regardless of the regulatory approval pathway, after the introduction of a generic competitor, a significant percentage of the sales of any branded product are typically lost to the generic product through both price and volume erosion. Accordingly, as we have observed with Trokendi XR and Oxtellar XR, competition from generic equivalents adversely, materially, and permanently impact our revenues, profitability, and cash flows from those products and may substantially limit our ability to obtain a return on the investments we have made in our products.

If our competitors develop or market alternatives for the treatment of our target indications, our commercial opportunities will be reduced or eliminated.

The pharmaceutical industry is characterized by rapidly advancing technologies, intense product-driven competition, and a strong emphasis on proprietary therapeutics. We face competition from a number of sources, some of which may target the same indications as to our products and product candidates. These include large pharmaceutical companies, smaller pharmaceutical companies, biotechnology companies, academic institutions, government agencies, and private and public research institutions. The availability of new products or the approval of new indications for existing products may limit the demand for and the price we are able to charge for any of our products. We may be unable to differentiate our products from competitive offerings.

In addition to competition for our current commercial products, we anticipate that we will face intense competition ~~when~~if our pipeline product candidates are approved by regulatory authorities and begin their commercialization process. In particular, we are aware of Serina Therapeutics developing a product candidate that may compete with ONAPGO (formerly SPN-830). Also, AbbVie has developed and received FDA approval in October 2024 to market a subcutaneous 24-hour infusion of levodopa-based therapy for the treatment of motor fluctuations in adults with advanced Parkinson disease (PD).

New developments, including the development of other drug technologies, may render our products or product candidates obsolete or noncompetitive. As a result, demand for our product may significantly decline or our products and product candidates may become obsolete before we recover expenses incurred in connection with their development or realize revenues from their commercialization. Moreover, many competitors have substantially greater:

•Capital resources;

•Research and development resources and experience, including personnel and technology;

•Drug development, clinical trial and regulatory resources and experience, including personnel and technology;

•Sales and marketing resources and experience;

•Manufacturing and distribution resources and experience;

•Name recognition; and

•Resources, experience and expertise in prosecution and enforcement of intellectual property rights.

As a result of these factors, our competitors may obtain regulatory approval of their products more rapidly than we are able to or may obtain patent protection or other intellectual property rights that limit or block us from developing or commercializing our product candidates. Our competitors may also develop drugs that are more effective, have faster onset to action, are better tolerated, subject to fewer or less severe side effects, are more widely prescribed or accepted, or are less costly than ours. They may also be more successful than us in manufacturing and marketing their products. If we are unable to compete effectively with the products of our competitors, or if such competitors are successful in developing products that compete with any of our approved product candidates, our business, results of operations, financial condition, and prospects may be materially and adversely affected. Mergers and acquisitions in the pharmaceutical industry may result in an even higher level of resources being concentrated at competitors. Competition may intensify as a result of advances made in the commercial applicability of technologies and as a result of greater availability of capital for investment.

Our products and our product candidates may be subject to restrictions or withdrawal from the market. We may be subject to penalties if we fail to comply with regulatory requirements.

Even though U.S. regulatory approval has been obtained for our products, the FDA may impose significant restrictions on their indicated uses, or may impose restrictions on marketing, or may impose requirements for costly post-approval studies. For example, certain of our products, including Qelbree, ONAPGO, ZURZUVAE, Oxtellar XR, Trokendi XR, and MYOBLOC, were approved on the basis of post-approval commitments.

We have post-marketing commitments for Qelbree including the requirement to (i) conduct a clinical efficacy and six month open label safety extension study for ADHD in pediatric patients 4 to 5 years of age, a lactation study and a descriptive study related to the use of Qelbree during pregnancy, and to(ii) assess the risks of adverse events and potential complications. We are working toward meeting these post-marketing commitments for Qelbree in a timely manner. We also have a post-marketing

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~~working~~commitment ~~toward~~to ~~meeting~~conduct ~~these~~a ~~post-marketing~~new ~~commitments~~leachable study for ~~Qelbree in a timely manner~~ONAPGO. WeThe ~~also~~final ~~have~~protocol ~~post-marketing~~was ~~commitment~~submitted toin ~~conduct~~September a2025. ~~new~~The ~~leachable~~final ~~study~~report ~~for~~is ~~ONAPGO,~~expected ~~which~~to ~~was~~be ~~approved~~submitted ~~by the FDA~~ in ~~February 2025~~2028.

We ~~also~~ have post-marketing commitments for ~~Oxtellar~~ZURZUVAE XRincluding ~~and~~the ~~MYOBLOC.~~requirement ~~Although we have initiated work on some of these post-marketing commitments, we have not been able~~ to ~~accomplish~~(i) ~~them.~~conduct Wean ~~were~~embryofetal ~~released~~development ~~from~~study ~~the majority of our post-marketing commitments for Trokendi XR~~ in ~~2024.~~a Ifsecond wespecies ~~do not meet our post-marketing commitments~~ and ~~are~~(ii) ~~unable~~Pediatric toResearch ~~show~~Equity ~~good~~Act ~~cause~~sNDA ~~for~~as ~~our~~an ~~inability~~efficacy tosupplement, ~~adhere~~including toproposed ~~the~~labeling ~~timetables laid out in the approval letters~~updates, ~~the~~and ~~FDA~~also ~~could~~plans ~~take~~to ~~enforcement~~include ~~action~~nonclinical ~~against~~labeling ~~us,~~and ~~including~~carton/container ~~withdrawal~~artwork ~~of approval~~updates.

~~Our~~We ~~products,~~also ~~product~~have ~~candidates,~~post-marketing ~~and~~commitments ~~our~~for ~~collaborators'~~Oxtellar ~~approved~~XR ~~products~~and ~~are~~MYOBLOC. ~~subject~~Although towe ~~ongoing~~have ~~FDA~~initiated ~~requirements~~work ~~governing~~on ~~the~~some ~~labeling, packaging, storage, advertising, promotion, recordkeeping, and submission~~ of ~~safety~~these ~~and~~post-marketing ~~other information. In addition~~commitments, ~~manufacturers~~we ofhave ~~drug~~not ~~products~~been ~~and~~able ~~their facilities are subject~~ to ~~continual~~accomplish ~~review~~them. ~~and~~We ~~periodic~~were ~~inspections~~released byfrom the ~~FDA~~majority ~~and~~of ~~other~~our ~~regulatory~~post-marketing ~~authorities~~commitments for ~~compliance~~Trokendi ~~with~~XR ~~current~~in ~~good manufacturing practice (cGMP) regulations~~2024. If we, ~~our~~do ~~collaborators,~~not ormeet aour ~~regulatory~~post-marketing ~~authority~~commitments ~~discover~~and ~~previously~~are ~~unknown~~unable ~~problems~~to ~~with~~show agood ~~product,~~cause ~~including~~for ~~side~~our ~~effects~~inability ~~that~~to ~~are~~adhere ~~unanticipated~~to inthe ~~severity~~timetables orlaid ~~frequency,~~out orin ~~problems with~~ the ~~facility~~approval ~~where the product is manufactured~~letters, athen ~~regulatory~~the ~~authority~~FDA ~~may~~could ~~impose~~take ~~restrictions~~enforcement onaction ~~that~~against ~~product or on the manufacturer~~us, including ~~requiring~~ withdrawal of ~~the product from the market or suspension of manufacturing~~approval.

IfOur weproducts, orproduct candidates, and our collaborators' approved products are subject to ongoing FDA requirements governing the labeling, orpackaging, ~~our~~storage, ~~products~~advertising, ~~product~~promotion, ~~candidates~~recordkeeping, orand ~~our~~submission ~~collaborators'~~of ~~products~~safety and other information. In addition, ormanufacturers ~~the~~of ~~manufacturing~~drug products and their facilities are subject to continual review and periodic inspections by the FDA and other regulatory authorities for compliance with current good manufacturing practice (cGMP) regulations. If we, our ~~products~~collaborators, or a regulatory authority discover previously unknown problems with a product, ~~candidates~~including orside ~~our~~effects ~~collaborators'~~that ~~products~~are ~~fail~~unanticipated toin ~~comply~~severity or frequency, or problems with ~~applicable~~the ~~regulatory~~facility ~~requirements~~where the product is manufactured, then a regulatory authority may: impose restrictions on that product or on the manufacturer, including requiring withdrawal of the product from the market or suspension of manufacturing.

If we or our collaborators, or our products, product candidates, or our collaborators' products, or the manufacturing facilities for our products, product candidates or our collaborators' products fail to comply with applicable regulatory requirements, then a regulatory authority may:

•Issue warning letters or untitled letters;

•Impose civil or criminal penalties;

•Suspend regulatory approval;

•Suspend any ongoing bioequivalence and/or clinical trials;

•Refuse to approve pending applications or supplements to applications filed by us;

•Impose restrictions on operations, including costly new manufacturing requirements, or suspend production for a sustained period of time; or

•Seize or detain products or require us to initiate a product recall.

In addition, our product labeling, advertising, and promotion of our approved products are subject to regulatory requirements and continuing regulatory review. The FDA strictly regulates the promotional claims that may be made about prescription products. In particular, a product may not be promoted for uses that are not approved by the FDA, as reflected in the product's approved labeling. ~~Notwithstanding~~However, physicians may ~~nevertheless~~ prescribe products to their patients in a manner that is inconsistent with the approved label, which is known as "off label use". The FDA and other authorities actively enforce the laws and regulations prohibiting the promotion of off-label uses, and a company that is found to have promoted off-label use may be subject to significant sanctions. The federal government has levied large civil and criminal fines against companies for alleged improper promotion and has enjoined companies from engaging in off-label promotion. If we are found to have promoted off-label use, then we may be enjoined from such off-label promotion and become subject to significant liability. This could have an adverse effect on our reputation, business, revenues, and profits.

Further, the FDA's policies may prospectively change. Additional government regulations may be enacted that could affect our products, or prevent, limit, or delay regulatory approval of our product candidates. If we are unable to adapt on a timely basis, or at all, to changes in existing requirements or to adopt new requirements or policies, or if we are not able to maintain regulatory compliance, then we may lose any marketing approval that we have obtained, adversely affecting our business, and prospects, ~~and~~as well as our ability to achieve or sustain profitability.

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We depend on collaborators to work with us to develop, manufacture and commercialize their and our products and product candidates. We have in-licensed or acquired a portion of our intellectual property necessary to develop certain of our product candidates. If we fail to comply with our obligations under any of these arrangements, we could lose the benefit of such collaborative relationships, including licenses or intellectual property rights.

~~Under~~We ~~the~~rely ~~Britannia~~on ~~Supply~~third-party ~~Agreement,~~collaborators ~~we have been granted certain intellectual property~~ and ~~product~~strategic ~~rights~~partners ~~in relation~~ to ~~APOKYN,~~market ~~including~~and ~~the~~commercialize ~~right~~our toproducts ~~use~~ and ~~market~~product ~~APOKYN~~candidates inoutside the ~~United States~~U.S. ~~Additionally,~~We ~~the~~are ~~Britannia~~party ~~Supply~~to ~~Agreement~~and ~~grants~~rely ~~Britannia~~on ~~certain~~several ~~intellectual~~arrangements ~~property~~with ~~and~~third ~~product~~parties ~~rights~~which inprovide ~~relation~~us towith ~~APOKYN,~~rights ~~including the right~~ to ~~use~~intellectual ~~and~~property ~~market~~that ~~APOKYN~~are innecessary for the ~~rest~~development of ~~the~~certain ~~world,~~of ~~excluding~~our ~~the~~product ~~United States~~candidates. ~~Per~~We ~~the~~also ~~Agreement,~~have ~~Britannia~~agreements ~~has~~with anleading ~~obligation~~CMOs to ~~supply~~manufacture usother ~~with~~commercial ~~APOKYN~~products ~~for our marketing~~ and ~~sale~~the ofAPI ~~the~~for ~~product.~~such products

~~Britannia~~Under ~~may~~the ~~terminate~~Britannia ~~its~~Supply ~~obligation to supply APOKYN for cause~~Agreement, orwe athave ~~any~~been ~~time,~~granted bycertain ~~giving~~intellectual atproperty ~~least~~and ~~twenty-four~~product ~~months'~~rights ~~written~~in ~~notice.~~relation ~~The~~to ~~Britannia~~APOKYN ~~Supply~~and ~~Agreement~~ONAPGO, ~~does~~including ~~not~~the ~~provide~~right ~~technology transfer assistance from Britannia~~ to ~~any~~use ~~new~~and ~~suppliers~~market wethose ~~might~~products ~~engage~~in ~~following~~the ~~termination~~United States. ~~In addition~~Additionally, the Britannia Supply Agreement isgrants ~~silent~~Britannia incertain ~~providing~~intellectual usproperty ~~with~~and anproduct ~~explicit~~rights ~~license~~in ~~grant~~relation to ~~any~~APOKYN, ~~intellectual~~including ~~property,~~the orright to ~~access~~use ~~know-how~~and ~~necessary~~market ~~or useful for manufacturing~~ APOKYN. Ifin wethe ~~materially~~rest ~~breach~~of the ~~Britannia Supply Agreement~~world, orexcluding ~~Britannia~~the ~~chooses~~United toStates. ~~terminate~~Per the ~~Britannia Supply~~ Agreement ~~for convenience~~, weBritannia ~~could~~has ~~lose~~an ~~the~~obligation ~~right~~to ~~and~~supply ~~resources~~us ~~necessary~~with APOKYN for ~~the~~our ~~manufacture~~marketing ofand ~~APOKYN~~sale orof ~~could~~the ~~incur~~product, ~~significant~~and ~~costs~~supplies ~~implementing~~us ~~technology~~with ~~transfer assistance~~ONAPGO.

WeBritannia ~~also~~may ~~have~~terminate ~~agreements~~its ~~with~~obligation ~~leading~~to ~~CMOs~~supply APOKYN for cause, or at any time, by giving at least twenty-four months' written notice. The Britannia Supply Agreement does not provide technology transfer assistance from Britannia to ~~manufacture~~any ~~other~~new ~~commercial~~suppliers ~~products~~we ~~and~~might engage following termination. In addition, the ~~API~~Britannia Supply Agreement is silent in providing us with an explicit license grant to any intellectual property, or to access know-how necessary or useful for ~~such~~manufacturing ~~products~~APOKYN or ONAPGO. ~~These~~If ~~CMOs~~we ~~offer~~materially abreach ~~comprehensive~~the ~~range~~Britannia Supply Agreement, or Britannia chooses to terminate the Britannia Supply Agreement for convenience, we could lose the right and resources necessary for the manufacture of ~~contract~~APOKYN ~~manufacturing~~and ~~services~~ONAPGO or could incur significant costs implementing technology transfer assistance.

WeIn ~~have~~addition, awe ~~license~~may ~~agreement~~enter ~~with~~into ~~United~~similar ~~Therapeutics~~arrangements ~~Corporation~~in tothe ~~use~~future ~~one~~for ofother ~~our~~product ~~proprietary~~candidates. ~~technologies~~Our incurrent anarrangements ~~oral~~impose ~~formulation~~various ofdevelopment, ~~treprostinil~~financial ~~diethanolamine~~and other obligations on us. If we materially breach these obligations, orof ~~treprostinil~~if third parties fail to adequately perform their respective obligations, ~~for~~these ~~the~~arrangements ~~treatment~~could ofbe ~~pulmonary~~terminated. ~~arterial~~Certain ~~hypertension~~agreements ~~and~~may ~~for~~be ~~other~~terminated ~~indications~~by our third-party collaborators without cause. The ~~Company~~termination isof ~~eligible~~those agreements could result in our inability to ~~receive~~develop, manufacture, market and ~~has~~sell ~~received~~products ~~royalties~~that ~~under~~are ~~this~~covered ~~agreement~~by ~~based~~such onintellectual ~~net~~properties. ~~product~~We ~~sales~~may ofnot ~~United~~have ~~Therapeutics~~sufficient ~~Corporation's~~resources ~~product~~to successfully establish future collaborations or license future arrangements on acceptable terms, ~~Orenitram~~if ~~(treprostinil)~~at all. We ~~are~~also ~~entitled~~face tocompetition ~~receive~~in ~~milestones~~our search for collaborators and ~~royalties~~licensing partners. By entering into strategic collaborations or similar arrangements, we rely on third parties to financially support their local operations, including support required for ~~the~~development, ~~use~~commercialization, ofsales, ~~this~~marketing, ~~formulation~~and regulatory activities, as well as expertise in ~~indications~~each ~~other~~of ~~than~~those ~~arterial~~subject ~~hypertension~~areas.

Namzaric (memantine hydrochloride extended release and donepezil hydrochloride) capsules for the treatment of moderate to severe dementia of an Alzheimer's type is currently marketed by Allergan plc under an exclusive license agreement between Adamas Pharmaceuticals, LLC and Forest Laboratories Holdings Limited ("Forest"), an indirect, wholly-owned subsidiary of Allergan plc (collectively, "Allergan") in the United States. Adamas Pharmaceuticals LLC receives royalties on net sales of Namzaric.

We rely on third-party collaborators and strategic partners to market and commercialize our products and product candidates outside the U.S. We are party to and rely on several arrangements with third parties which provide us with rights to intellectual property that are necessary for the development of certain of our product candidates. In addition, we may enter into similar arrangements in the future for other product candidates. Our current arrangements impose various development, financial and other obligations on us. If we materially breach these obligations, of if third parties fail to adequately perform their respective obligations, these arrangements could be terminated which could result in our inability to develop, manufacture, market and sell products that are covered by such intellectual properties. We may not have sufficient resources to successfully establish future collaborations or license future arrangements on acceptable terms, if at all. We also face competition in our search for collaborators and licensing partners. By entering into strategic collaborations or similar arrangements, we rely on third parties to financially support their local operations, including support required for development, commercialization, sales, marketing, and regulatory activities, as well as expertise in each of those subject areas.

Refer to Part I, Item 1—Business—Collaborations and Licensing Agreements, of our Annual Report on Form 10-K for discussion on the different collaborations and licensing arrangements.

Our future collaboration agreements may limit the areas of research and development that we may pursue, either alone or in collaboration with third parties. Much of the potential revenues from these future collaborations may consist of contingent payments, such as payments for achieving certain development milestones and royalties payable on product sales. The milestones and royalty revenues that we may receive under these collaborations will depend upon our collaborators' ability to successfully develop, introduce, market and sell new products. Future collaboration partners may fail to develop or effectively commercialize products, product candidates, or technologies because they, among other things, may:

•Change the focus of their development and commercialization efforts, or may have insufficient resources to effectively develop our product candidates;

Table of ContentsITEM 1A. RISK FACTORS.

•Pharmaceutical and biotechnology companies historically have re-evaluated their development and commercialization priorities following mergers and consolidations, which have been common in recent years. The ability of some of our product candidates to reach their potential could be limited if our future collaborators fail to apply sufficient development or commercialization efforts related to those product candidates;

•Decide not to devote the necessary resources due to internal constraints, such as limited personnel with the requisite scientific expertise, limited cash resources, or in the belief that other internal drug development programs may have a higher likelihood of obtaining marketing approval, or may potentially generate a greater return on investment;

•Develop and commercialize, either alone or with others, drugs that are similar to or competitive with the product candidates that are the subject of their collaboration with us;

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ITEM 1A. RISK FACTORS.

•Not have necessary and sufficient resources to develop the product candidate through clinical development, marketing approval, and commercialization;

•Fail to comply with applicable regulatory requirements;

•Are unable to obtain the necessary marketing approvals; or

•Breach or terminate their arrangement with us.

If collaboration partners fail to develop or fail to effectively commercialize our products for any of these reasons, we may not be able to replace the collaboration partner with another partner to develop and commercialize the product under the terms of the collaboration, if at all. Further, even if we are able to replace the collaboration partner, we may not be able to do so on commercially favorable terms. As a result, the development and commercialization of the affected product or product candidate could be delayed, impaired, or terminated because we may not have sufficient financial resources or capabilities to continue the development and commercialization of the product candidate on our own. Failure of our third-party collaborators to successfully market and commercialize our products or product candidates within and outside the U.S. could materially diminish our revenues and harm our results of operations.

The commercial results of ZURZUVAE® (zuranolone) depend, in part, on our ability, with our collaboration partner, Biogen MA Inc., and Biogen International GmbH, or together, Biogen, to successfully continue the commercialization of the product for the treatment of women with postpartum depression, or PPD, in the U.S. There is no assurance that our commercialization efforts in the U.S. with respect to ZURZUVAE for the treatment of women with PPD will be successful or that we will be able to generate revenues at the levels or on the timing we expect or at levels or on the timing necessary to support our goals.

The commercial results of ZURZUVAE depend, in part, on our ability, along with our collaboration partner, Biogen, to successfully continue the commercialize of ZURZUVAE in the U.S. for the treatment of women with PPD. ZURZUVAE was approved by the United States Food and Drug Administration, or FDA, in August 2023 as a treatment for adults with PPD and became commercially available in the U.S. in December 2023.

ZURZUVAE is the first oral treatment specifically indicated for adults with PPD. ZURZUVAE may not achieve, or, even if achieved, maintain, broad market acceptance. Healthcare professionals may decide not to use ZURZUVAE as a treatment option for their patients with PPD or may only consider prescribing ZURZUVAE for a subset of women with PPD in their practice who they consider to have particularly severe symptoms relative to other patients suffering from this disease. ZURZUVAE also may not achieve or, even if achieved, maintain broad market acceptance among women with PPD who may decide that they do not want to be treated with ZURZUVAE, including due to concern about the safety and tolerability profile of ZURZUVAE or use of ZURZUVAE while breastfeeding. ZURZUVAE includes a boxed warning that instructs healthcare professionals to advise patients that ZURZUVAE causes driving impairment due to central nervous system depressant effects, and that people who take ZURZUVAE should not drive a motor vehicle or engage in other potentially hazardous activities requiring complete mental alertness until at least 12 hours after ZURZUVAE administration for the duration of the once-daily, 14-day treatment course, which could decrease willingness to prescribe or use ZURZUVAE. The label also includes information about adverse events and other warnings and precautions that may cause a woman with PPD not to consider ZURZUVAE as a treatment option.

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ITEM 1A. RISK FACTORS.

Our commercialization of ZURZUVAE in PPD may be negatively impacted by competition from other drugs currently on the market or that may be approved in the future. The number of women with PPD, the unmet need for additional treatment options for women with PPD, and the potential market for ZURZUVAE may be significantly smaller than we expect, or we and Biogen may encounter other market-related issues in the commercialization of ZURZUVAE for the treatment of women with PPD, including as a result of the price we charge. We and our collaboration partner, Biogen, may not be applying the optimal resources to the launch of ZURZUVAE or we or Biogen may not be able or willing to scale our resources at the right time or at an effective level.

Even if our product candidates receive regulatory approval in the U.S., we or our collaborators may not receive approval to commercialize our product candidates outside of the U.S.

To market any product outside of the U.S., we or our collaborators must establish and comply with numerous and varying regulatory requirements of other regulatory jurisdictions regarding safety and efficacy. For example, we are party to a collaboration and license agreement with Shionogi whereby Shionogi is responsible for, among other things, obtaining regulatory approval for zuranolone in MDD and other indications in Japan, the Republic of Korea (South Korea), and Taiwan. In December 2025, Shionogi announced that it received regulatory approval for zuranolone in MDD in Japan. Additionally, we are party to an agreement with Knight Therapeutics, Inc. (Knight) granting Knight the right to commercialize Qelbree in Canada, subject to it obtaining approval by Health Canada. In November 2025, Knight announced that it experienced regulatory setbacks for Qelbree. Approval procedures vary among jurisdictions and can involve product testing and administrative review periods different from, and longer than, those in the U.S. The time required to obtain approval in other jurisdictions might differ from that required to obtain FDA approval. The regulatory approval process in other jurisdictions may include all of the risks detailed above regarding FDA approval in the U.S., as well as other risks. For example, legislation analogous to Section 505(b)(2) of the FDCA in the U.S., which relates to the ability of an NDA applicant to use published data not developed by such applicant, may not exist in other countries. In territories where data are not freely available, we may not have the ability to commercialize our products without first negotiating with third parties to obtain their permission to refer to their clinical data in our regulatory applications. This process could require the expenditure of significant additional funds and time.

In addition, regulatory approval in one jurisdiction does not ensure regulatory approval in another. A failure or delay in obtaining regulatory approval in one jurisdiction may have a negative effect on the regulatory processes in others. Failure to obtain regulatory approval in other jurisdictions, or any delay or setback in obtaining such approvals, could have the same adverse effects as detailed above regarding FDA approval. As described above, such effects include the risks that any of our product candidates may not be approved for all requested indications, which could limit the uses of our product candidates and could have an adverse effect on their commercial potential or could require costly post-marketing studies.

Our failure to successfully develop and market our product candidates would impair our ability to grow.

As part of our growth strategy, we intend to develop and market additional product candidates. We may spend substantial resources and several years completing the development of a particular current or future internal product candidate, during which process we can experience failure at any stage, and for many reasons. The product candidates to which we allocate our resources, even if approved, may not be commercially successful. In addition, because our internal research capabilities are limited, we may be dependent upon pharmaceutical companies, academic scientists, and other researchers to sell or license products or technologies to us. The success of this strategy depends partly upon our ability to identify, select, discover and acquire promising pharmaceutical product candidates and approved products, and to manage our spending as expenses related to undertaking clinical trials can be substantial.

40Recent Executive Orders May Impact our Financial Results.

~~Table~~During 2025 several Executive Orders were issued by the President of ~~ContentsITEM~~the 1AUnited States, which generally aim to lower the price paid for certain pharmaceutical products in the United States. ~~RISK~~Aspects ~~FACTORS~~of these orders direct the Secretary of Health and Human Services to develop implementation plans and to issue related regulations.

~~products~~We orare ~~technologies~~monitoring tothese usdevelopments and assessing the potential impact. ~~The~~These ~~success~~Executive ofOrders ~~this~~may ~~strategy~~impact ~~depends~~our ~~partly~~financial ~~upon~~results if they result in reduction in the price paid for any of our ~~ability~~commercial products. Certain aspects of the Executive Orders, such as those related to ~~identify~~a “Most-Favored-Nation” (MFN) model, ~~select~~could have broader industry-wide effects. For example, ~~discover~~such ~~and~~policies ~~acquire~~may ~~promising~~lead pharmaceutical ~~product~~companies ~~candidates~~to ~~and~~avoid ~~approved~~or ~~products,~~delay ~~and~~expanding sales into foreign markets to ~~manage~~prevent ~~our~~triggering ~~spending~~lower asU.S. ~~expenses~~price ~~related~~benchmarks, towhich ~~undertaking~~could, ~~clinical~~in ~~trials~~turn, ~~can~~reduce bepotential ~~substantial~~future growth opportunities.

In February 2025, the FDA approved ONAPGO (apomorphine hydrochloride) injection, formerly known as SPN-830, as the first and only subcutaneous apomorphine infusion device for the treatment of motor fluctuations in adults with advanced PD.47

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We may be unable to acquire product candidates or products.

The process of proposing, negotiating, and implementing a license, or acquiring a product candidate or an approved product, is lengthy and complex. Other companies, including some with substantially greater financial, marketing and sales resources, may compete with us for the license, the product candidate, or approved product. We have limited resources, including financial resources, to identify and execute the acquisition or in-licensing of third-party products, businesses, and technologies and integrate them into our current infrastructure. Moreover, we may devote significant resources to potential acquisitions, or in-licensing opportunities wherein those transactions are never consummated, or we may fail to realize the anticipated benefits of such efforts. We may not be able to acquire the rights to additional product candidates on terms that we find acceptable or at all.

In addition, future acquisitions may entail numerous operational and financial risks, including:

•Exposure to potential and unknown liabilities;

•Disruption of our business, and diversion of our management's time and attention, to develop acquired products or technologies;

•Incur substantial debt, or dilutive issuances of securities, or depletion of cash to pay for acquisitions;

•Incur higher than expected acquisition, integration, and operating costs;

•Experience difficulty in combining the operations and personnel of any acquired businesses with our operations and personnel;

•Impair relationships with key suppliers or customers of any acquired businesses due to changes in management and ownership; and

•Unable to retain and/or motivate key employees of any acquired businesses.

Our clinical trials for our product candidates may fail to demonstrate acceptable levels of safety, efficacy, or other requirements, which could prevent or significantly delay regulatory approval.

We may be unable to sufficiently demonstrate the safety and efficacy of our product candidates in obtaining regulatory approval. We must demonstrate, with substantial evidence gathered in well-controlled studies and to the satisfaction of the relevant regulatory authorities, that each product candidate is safe and effective for use in the target indication. We may be required to conduct additional studies or trials to adequately demonstrate safety and efficacy, which could prevent or significantly delay our receipt of regulatory approval, increase clinical costs, and ultimately delay or otherwise impair the commercialization of that product candidate.

Any product candidate that we in-license or acquire may require additional development prior to commercial sale, including formulation development, extensive clinical testing, and approval by the FDA or applicable foreign regulatory authorities. All product candidates are prone to risks of failure typical to pharmaceutical product development, including the possibility that a product candidate will not be shown to be sufficiently safe and effective for approval by regulatory authorities.

In addition, the results from the trials that we have completed for our product candidates may not be replicated in future trials. A number of companies in the pharmaceutical industry have suffered significant setbacks in advanced development, even after promising results in earlier trials. If our product candidates are not shown to be safe and effective, these clinical development programs might be terminated.

41Delays or failures in the completion of clinical development of our product candidates would increase our costs, and delay, or limit our ability to generate revenues.

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Delays or failures in the completion of clinical development of our product candidates would increase our costs, delay, or limit our ability to generate revenues.

Delays or failures in the completion of clinical trials for our product candidates could significantly raise our product development costs. We do not know whether current or planned trials will be completed on schedule, if at all. The commencement and completion of clinical development can be delayed or halted for a number of reasons, including:

•Difficulties in obtaining regulatory approval to commence a clinical trial or in complying with conditions imposed by a regulatory authority regarding the scope or term of a clinical trial;

•Difficulties obtaining IRB or ethics committee approval to conduct a trial at a prospective site;

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ITEM 1A. RISK FACTORS.

•Delays in reaching or failure to reach agreement on acceptable terms with prospective trial sites and investigators, the contractual terms of which can be subject to extensive negotiation and may vary significantly from site to site;

•Insufficient or inadequate supply of or quantity of a product candidate for use in trials;

•Challenges recruiting and enrolling patients to participate in clinical trials, for any and all reasons, including competition from other programs for the treatment of similar conditions;

•Severe or unexpected drug-related side effects experienced by patients in a clinical trial;

•Difficulty retaining patients who have enrolled in a clinical trial but who may be prone to withdraw due to side effects from the therapy, lack of efficacy, or personal issues;

•Temporary cessation of clinical trials (clinical holds); or

•Delays due to ambiguous or negative interim results in clinical trials.

Clinical trials may be suspended or terminated by us; or at a trial site by the site's Data Safety Monitoring Board (DSMB) or ethics committee overseeing the clinical trial; or by the FDA; or by other regulatory authorities due to a number of factors, including:

•Failure to conduct the clinical trial in accordance with regulatory requirements or the trial protocols;

•Observations during an inspection of the clinical trial operations or trial sites by the FDA or other regulatory authorities which ultimately result in the imposition of a delay or clinical hold;

•Unforeseen safety issues; or

•Lack of adequate funding to continue the trial.

Failure to conduct the clinical trial in accordance with regulatory requirements or the trial protocols may result in the inability to use the trial data to support product approval. Changes in regulatory requirements and guidance may occur, and we may need to amend clinical trial protocols to reflect these changes. Amendments may require us to resubmit our clinical trial protocols to IRBs or ethics committees for reexamination, which may adversely impact the cost, timing, and/or successful completion of a clinical trial.

In addition, many of the factors that cause or lead to a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of our product candidates. If we experience delays in completion, or if we terminate any of our clinical trials, our ability to obtain regulatory approval of our product candidates may be materially harmed, and our commercial prospects and ability to generate product revenues diminished.

Additionally, the current inflationary environment, unstable economic conditions and geopolitical events may delay our trials or significantly increase our product development costs.

Our products and product candidates may cause undesirable side effects or have other characteristics that limit their commercial potential, delay, or prevent their regulatory approval.

Undesirable side effects caused by any of our product candidates could cause us or regulatory authorities to interrupt, delay or halt development. This could result in the denial of regulatory approval by the FDA or other regulatory authorities and result in potential product liability claims. Undesirable side effects caused by any of our products could cause regulatory authorities to temporarily or permanently halt product sales, which could have a material adverse effect on our business. As required by the FDA, the labels for our products include precautions and warnings about side effects, and in certain cases, the need for monitoring patients receiving the product.

42If our products cause side effects, and we or others later identify undesirable side effects caused by our products or product candidates, then a number of potentially significant negative consequences could result, including, among others:

Table of ContentsITEM 1A. RISK FACTORS.

authorities to temporarily or permanently halt product sales, which could have a material adverse effect on our business. As required by the FDA, the labels for our products include precautions and warnings about side effects, and in certain cases, the need for monitoring patients receiving the product.

If our products cause side effects, and we or others later identify undesirable side effects caused by our products or product candidates, a number of potentially significant negative consequences could result, including, among others:

•regulatory authorities may withdraw approval of the product or otherwise require us to take the approved product off the market;

~~•regulatory authorities may require additional warnings or a narrowing of the indication on the product label; or~~49

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•regulatory authorities may require additional warnings or a narrowing of the indication on the product label;

•we may be required to create a medication guide outlining the proper use of the medication and the risks of side effects for distribution to patients;

•we may be required to modify the product in some way;

•regulatory authorities may require us to conduct additional clinical trials, or costly post-marketing testing and surveillance, to monitor the safety or efficacy of the product;

•sales of approved products may decrease significantly;

•we could be sued and be held liable for harm caused to patients; or

•our reputation may suffer.

Any of these events could prevent us from achieving or maintaining the commercial success of our products and product candidates and could substantially increase commercialization costs.

We may not obtain or maintain the benefits associated with designation as an orphan drug under the Orphan Drug ~~Designation~~Act, including market exclusivity.

Regulatory authorities in the United States may designate drugs for relatively small patient populations as orphan drugs. The FDA may grant Orphan Drug Designation to drugs or biological products intended to prevent, diagnose, or treat a rare disease or condition that affects fewer than 200,000 individuals ~~annually~~ in the U.S. annually. Orphan ~~Drug~~drug ~~Designation~~designation entitles a party to financial incentives, such as opportunities for grant funding towards clinical trial costs, tax credits for certain research, and user fee waivers under certain circumstances. In addition, if a drug receives its first FDA approval in an indication for which it has Orphan Drug Designation, that drug is entitled to seven years of market exclusivity. This implies that the FDA may not approve any other firm's application for the same drug for that same indication for a period of seven years. Exceptions are limited, such as showing of clinical superiority over the drug with orphan drug exclusivity.

Although historically we have been granted orphan ~~FDA~~drug ~~Orphan~~designation ~~Drug~~under ~~Designation for SPN-817 for~~ the ~~treatment~~Orphan ofDrug ~~Dravet~~Act ~~Syndrome~~for ~~and~~certain ~~Lennox-Gaustaut~~drug ~~Syndrome~~products and ~~for~~product ~~ONAPGO for the treatment of motor fluctuations in adults with advanced PD~~candidates, and we intend to expand our designation for alternative uses where applicable, we may not receive the benefits associated with Orphan Drug Designation. This may result from a failure to maintain orphan drug status, or it may result from a competing product reaching the market with an orphan designation for the same disease indication. Under U.S. rules for orphan drugs, if such a competing product reaches the market before ours does, the competing product could potentially obtain a scope of market exclusivity that limits or precludes our product from being sold in the U.S. for seven years. Even if we obtain exclusivity, the FDA could subsequently approve an alternative drug for the same condition if the FDA concludes that the second to reach the market is clinically superior inby ~~that~~being ~~it is~~ safer, or more effective, or ~~makes~~by it making a major contribution to patient care. In addition, a competitor may receive approval of different products for the same indication for which our orphan product has exclusivity or may obtain approval for the same product but for a different indication for which the orphan product has exclusivity.

In August 2017, the FDA Reauthorization Act of 2017 (FDARA) was enacted. FDARA, among other things, codified the FDA's pre-existing regulatory interpretation to require that a drug sponsor demonstrate clinical superiority of an orphan drug that is otherwise the same as a previously approved drug for the same rare disease in order for the new drug to receive orphan drug exclusivity. The new legislation reverses prior precedent holding that the Orphan Drug Act unambiguously requires that the FDA recognize the orphan exclusivity period, regardless of showing clinical superiority.

The FDA may further reevaluate the Orphan Drug Act, including the FDARA amendment, its regulations, and policies. We do not know if, when, or how the FDA may change the orphan drug regulations and policies in the future. It is uncertain how any changes might affect our business. Depending on what changes the FDA may make to its orphan drug regulations and policies, our business could be adversely impacted.

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any changes might affect our business. Depending on what changes the FDA may make to its orphan drug regulations and policies, our business could be adversely impacted.

Healthcare reform measures could hinder or prevent the commercial success of our products or product candidates.

The U.S. and certain states have shown significant, increased interest in pursuing healthcare reform and changes to the healthcare delivery system. Numerous major markets outside the USU.S., including the EU, Japan, and China, have widespread governmental involvement in healthcare funding, including with regard to pricing and reimbursement of pharmaceuticals. Government-adopted reform measures could adversely impact the pricing of healthcare products and services in the U.S. or internationally, adversely impacting the level of reimbursement available from governmental agencies and/or commercial third-party payors. The continuing efforts of third-party payors, including U.S. federal and state agencies, foreign governments, insurance companies, managed care organizations, employers, and other payors of healthcare services to contain or reduce healthcare costs may adversely affect the Company's ability to set prices at launch, increase prices after launch, generate revenues, achieve profitability, and/or maintain profitability. In addition to healthcare reform initiatives in the U.S. and in other countries, there are (i) new laws, regulations, and judicial or other governmental decisions affecting pricing, drug reimbursement, and access or marketing within or across jurisdictions; (ii) changes in intellectual property laws; (iii) changes in accounting standards; (iv) new and increasing data privacy regulations and enforcement; (v) legislative mandates or preferences for local manufacturing of pharmaceutical products; and (vi) emerging and new global regulatory requirements for reporting payments and other value transfers to healthcare professionals. The costs of compliance with such laws and regulations, or the negative results of non-compliance, could adversely affect the business, cash flow, results of operations, financial condition and prospects of the Company. The Company believes that the healthcare industry will continue to be subject to increasing regulation as well as legal and political action, as future proposals to reform the healthcare system are considered by the U.S. Executive branch, Congress, and state legislatures.

In March 2010, a comprehensive change to the U.S. healthcare system, known as the Patient Protection and Affordable Care Act of 2010 (ACA) was enacted, as amended by the Health Care and Education Reconciliation Act of 2010. These laws and their regulations (collectively "HealthCare Reform Law") have far reaching consequences for pharmaceutical companies like the Company. Possible revisions to the HealthCare Reform Law are the subject of continuing legislative debates and litigation.50

~~The~~Table ~~HealthCare~~of ~~Reform~~Contents ~~Law~~ITEM ~~exerts downward pressure on pharmaceutical pricing, especially under the Medicare and Medicaid programs, and has increased the industry's regulatory burden and operating costs~~1A. ~~Among~~RISK ~~the provisions of the HealthCare Reform Law of importance to the Company's products and product candidates are the following:~~FACTORS.

~~•An~~Government-adopted ~~annual~~reform measures could adversely impact the pricing of healthcare products and services in the U.S. or internationally, ~~nondeductible~~adversely ~~fee~~impact ~~payable~~the level of reimbursement available from governmental agencies and/or commercial third-party payors. The continuing efforts of third-party payors, including U.S. federal and state agencies, foreign governments, insurance companies, managed care organizations, employers, and other payors of healthcare services to contain or reduce healthcare costs may adversely affect the Company's ability to set prices at launch, increase prices after launch, generate revenues, achieve profitability, and/or maintain profitability. In addition to healthcare reform initiatives in the U.S. ~~federal~~and ~~government~~in byother ~~any~~countries, ~~entity~~there ~~that~~are ~~manufactures~~(i) new laws, regulations, and judicial or ~~imports~~other ~~specified~~governmental ~~branded~~decisions ~~prescription~~affecting ~~drugs~~pricing, drug reimbursement, and access or ~~biologic~~marketing ~~agents~~within or across jurisdictions; (ii) changes in intellectual property laws; (iii) changes in accounting standards; (iv) new and increasing data privacy regulations and enforcement; (v) legislative mandates or preferences for local manufacturing of pharmaceutical products; and (vi) emerging and new global regulatory requirements for reporting payments and other value transfers to healthcare professionals. ~~This~~The ~~fee~~costs isof ~~based~~compliance onwith ~~each~~such ~~company's~~laws ~~market~~and ~~share~~regulations, or the negative results of ~~prior~~non-compliance, ~~year~~could ~~total~~adversely ~~sales~~affect the business, cash flow, results of ~~branded~~operations, ~~products~~financial condition and prospects of the Company. The Company believes that the healthcare industry will continue to ~~certain~~be ~~federal~~subject to increasing regulation as well as legal and political action, as future proposals to reform the healthcare ~~programs;~~system are considered by the U.S. Executive branch, Congress, and state legislatures. For additional information see Item 1. Business – Government Regulation” and “Item 1. Business – Pharmaceutical Coverage, Pricing, and Reimbursement.

~~•An~~In ~~increase~~2021 inthe American Rescue Plan Act (ARPA) was signed into law, which includes a provision eliminating the statutory ~~minimum~~cap on rebates that drug manufacturers pay to Medicaid beginning in January 2024. These rebates function as a discount off the list price and eliminating the cap means that manufacturer ~~must~~discounts paid to Medicaid can increase. Prior to this change, manufacturers had not been required to pay ~~under~~more than 100% of the Average Manufacturer Price (AMP) in rebates to state Medicaid ~~Drug~~programs ~~Rebate~~for ~~Program;~~Medicaid-covered drugs. As a result of this provision, effective January 1, 2024 manufacturers may have to pay state Medicaid programs more in rebates than they receive on sales of particular products. This change could present a risk to the Company in the future for drugs that have high Medicaid utilization and rebate exposure that is more than 100% of the AMP. As a result of ARPA certain pharmaceutical manufacturers may reconsider pricing strategies and overall business in Medicaid and other federal programs. Among other major changes to ARPA in 2025, annual reporters were required to submit their final activity report for COVID-19 funds between April 1 and April 30, 2025. Many of the COVID-related public health grants to states and local public health under ARPA were scheduled to cease in September 2025, but such termination dates are grant-dependent.

•Extension of manufacturers' Medicaid rebate liability to individuals enrolled in Medicaid managed care organizations;

•Expansion of the eligibility criteria for Medicaid programs in certain states;

•Expansion of the entities eligible for discounts under the Public Health Service pharmaceutical pricing program;

•A requirement to annually report the number of drug samples that manufacturers and distributors provide to physicians; and

Table of ContentsITEM 1A. RISK FACTORS.

•A Patient-Centered Outcomes Research Institute to oversee, identify priorities for, and conduct comparative clinical effectiveness research, and provide funding for such research.

In 2021 the American Rescue Plan Act (“ARPA”) was signed into law, which includes a provision eliminating the statutory cap on rebates that drug manufacturers pay to Medicaid beginning in January 2024. These rebates function as a discount off the list price and eliminating the cap means that manufacturer discounts paid to Medicaid can increase. Prior to this change, manufacturers had not been required to pay more than 100% of the Average Manufacturer Price (“AMP”) in rebates to state Medicaid programs for Medicaid-covered drugs. As a result of this provision, effective January 1, 2024 manufacturers may have to pay state Medicaid programs more in rebates than they receive on sales of particular products. This change could present a risk to the Company in the future for drugs that have high Medicaid utilization and rebate exposure that is more than 100% of the AMP. As a result of ARPA certain pharmaceutical manufacturers may reconsider pricing strategies and overall business in Medicaid and other federal programs.

In addition to those changes discussed above, in recent years there have also been several Congressional inquiries and proposed bills designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare; review the relationship between pricing and manufacturer patient programs, and reform government programs reimbursement methodologies for drugs.

Executive orders have changed certain provisions of the HealthCare Reform Law, while other provisions have been subject to court challenges. On June 17, 2021, the U.S. Supreme Court dismissed the most recent judicial challenge to the HealthCare Reform Law, brought by several states, without specifically ruling on the constitutionality of the HealthCare Reform Law. Prior to the U.S. Supreme Court ruling, then President Biden issued an executive order instructing certain governmental agencies to review and reconsider their existing policies and rules that limit access to healthcare, including, among others, re-examining Medicaid demonstration projects and waiver programs that include work requirements, and policies that create barriers to obtaining access to health insurance coverage through Medicaid or the HealthCare Reform Law.

On June 28, 2024, the Supreme Court overruled their landmark 1984 decision in Chevron v. Natural Resources Defense Council, which gave rise to the doctrine known as the Chevron doctrine. The Supreme Court’s ruling sharply reduced the power of federal agencies to interpret the laws they administer and ruled that courts should rely on their own interpretation of ambiguous laws. This ruling could have a significant impact on the health care industry, which is heavily regulated by multiple federal agencies and subject to frequent federal rulemaking regarding such topics as reimbursement, health care operations, patient safety, and patient privacy.

There was enormous growth and visibility for artificial intelligence (AI) systems and tools in 2023, leading to increased calls for regulation and oversight. On October 30, 2023, the Biden Administration issued an Executive Order on the Safe, Secure, and Trustworthy Development and Use of AI, which addressed the use of AI in health care and the safety and integrity of data stored and generated by AI health care technology systems and directed HHS to establish an AI Task Force that must, within 365 days of its creation, develop policies and specific frameworks addressing the use of AI and AI -enabled technologies in the health sector, including research, drug and device safety, and health care delivery and financing.

Congress may consider other legislation to repeal or replace elements of the HealthCare Reform Law. It is difficult to predict the extent to which any of these changes to the HealthCare Reform Law, or additional changes if made, may impact the Company's business or any financial condition.

The Company's activities, including research, preclinical testing, clinical trials, and the manufacturing and marketing of its products, are subject to extensive regulation by numerous federal, state and local governmental authorities in the U.S., including the FDA, and by foreign regulatory authorities. In the U.S., the FDA administers requirements covering the testing, approval safety, effectiveness, manufacturing, labeling, and marketing of prescription pharmaceuticals and vaccines. In some instances, the FDA requirements have increased the amount of time and resources necessary to develop new products and bring them to market in the U.S. FDA statutes, regulations, and guidance often are revised or reinterpreted by the FDA in ways that may significantly affect the Company's business and products.

Table of ContentsITEM 1A. RISK FACTORS.

The FDA Reauthorization Act of 2017 (FDARA) amended the FDCA to revise and extend the user-fee programs for drugs, medical devices, generic drugs, and biosimilar biological products, and for other programs. FDARA reauthorized the various user fees to facilitate the FDA's review and oversight relating to prescription drugs, generic drugs, medical devices, and biosimilars. FDA's authority, including, among others, pediatric study requirements, orphan drug exclusivity, and the approval process for generic drugs.

The FDA also has enhanced its post-marketing authority, including the authority to require post-marketing studies and clinical trials, make labeling changes based on new safety information, or to require compliance with risk evaluation and mitigation strategies. The 2012 Food and Drug Administration Safety and Innovation Act expanded drug supply chain reporting requirements and strengthened the FDA's response to drug shortages. The FDA's exercise of its authority could result in delays or increase costs during product development and regulatory review. It could also result in increased costs to assure compliance with post-approval regulatory requirements and potential restrictions on the sale and/or distribution of any approved product. It is impossible to predict whether additional legislative changes will be enacted or whether FDA regulations, guidance, or interpretations will be changed, and what the impact of such changes, if any, may be. Future regulatory changes could make it more difficult for the Company to maintain or attain approval to develop and commercialize its products and technologies.

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ITEM 1A. RISK FACTORS.

mitigation strategies. The 2012 Food and Drug Administration Safety and Innovation Act expanded drug supply chain reporting requirements and strengthened the FDA's response to drug shortages. The FDA's exercise of its authority could result in delays or increase costs during product development and regulatory review. It could also result in increased costs to assure compliance with post-approval regulatory requirements and potential restrictions on the sale and/or distribution of any approved product. It is impossible to predict whether additional legislative changes will be enacted or whether FDA regulations, guidance, or interpretations will be changed, and what the impact of such changes, if any, may be. Future regulatory changes could make it more difficult for the Company to maintain or attain approval to develop and commercialize its products and technologies.

Healthcare cost containment legislation and the failure of third-party payors to provide appropriate levels of coverage and reimbursement for the use of products and treatments facilitated by our products could harm our business and prospects.

The Company's products are dependent on the coverage decisions and reimbursement policies established by government healthcare programs and private health insurers. These policies affect which products customers purchase and the prices customers are willing to pay. Reimbursement varies by country and can significantly impact the acceptance of new products and technologies. Even if the Company develops a promising new product, there may be limited demand for the product unless appropriate reimbursement approval is obtained from private and governmental third-party payors. Additional legislative or administrative reforms to the reimbursement systems in the U.S. and other countries that significantly reduce reimbursement for the Company's products, including price regulation, competitive bidding and tendering, coverage and payment policies, comparative effectiveness of therapies, technology assessments, and managed-care arrangements, could have a material adverse effect on the Company's business, financial condition or results of operations.

Certain U.S. states have become increasingly active in enacting statutes and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, and restrictions on access to certain products, which creates additional compliance challenges for the Company. Marketing cost disclosure and transparency measures have been designed to encourage importation from other countries and bulk purchasing. In addition, regional healthcare authorities and individual hospitals increasingly are using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug formularies. Legally mandated price controls on payment amounts by third-party payors, or other similar restrictions, could harm the Company's business, results of operations, financial condition, and prospects. These price controls could prevent the Company from being able to commercialize its products or to generate an acceptable return on its investment. For additional information see Item 1. Business – Pharmaceutical Coverage, Pricing, and Reimbursement.

~~Other~~The UCompany cannot predict whether additional legislation or rulemaking will be issued or enacted, or what impact, if any, such changes will have on the profitability of any of the Company's products.S. ~~healthcare~~There ~~cost~~also ~~containment~~may ~~statutes~~be ~~include:~~future changes unrelated to the already existing laws that result in reductions in potential coverage and reimbursement levels for the Company's products, and we cannot predict the scope of any future changes or the impact that those changes may have on its business.

~~•The~~In ~~2013~~addition ~~Drug~~to ~~Quality~~the ~~and Security Act (DQSA)~~foregoing, ~~which creates~~ the ~~requirement~~White ~~for~~House ~~companies~~has toissued ~~trace,~~certain ~~verify~~Executive ~~and~~Orders ~~identify~~in ~~all~~2025 ~~products~~that ~~through~~reflect ~~the~~additional ~~entire~~healthcare ~~supply~~cost ~~chain,~~containment ~~from manufacturer to dispenser~~policies. On ~~Title~~April ~~I of the DQSA~~15, ~~the Compounding Quality Act~~2025, ~~increased~~President ~~regulation~~Trump ofissued ~~compounding~~an ~~drugs.~~Executive ~~Title~~Order IIdirecting offederal ~~DQSA,~~agencies ~~the Drug Supply Chain Security Act~~ (~~DSCSA)~~primarily ~~established requirements to facilitate improved tracking of prescription drug products through~~ the ~~supply~~HHS, ~~chain with increased product identification requirements. DSCSA requires such tracking to be done farther down the distribution chain~~FDA, ~~including (i) wholesalers' verification~~ and ~~tracking,~~the ~~(ii)~~Office ~~pharmacy~~of ~~verification~~Management and ~~tracking,~~Budget ~~and~~ (~~iii~~OMB)) atto ~~the~~reduce ~~unit~~prescription ~~level~~costs ~~throughout~~by ~~the~~increasing ~~entire~~price ~~supply chain. In August 2023~~transparency, ~~FDA~~expanding ~~announced~~Medicare ~~final~~drug ~~guidance~~price ~~pertaining to Title II~~negotiations, ~~entitled~~accelerating ~~“Enhanced~~generic ~~Drug~~and ~~Distribution~~biosimilar ~~Security~~approvals, ~~Requirements~~and ~~Under~~exploring ~~Section~~importation ~~582(g)(1)~~ of ~~the Federal Food, Drug, and Cosmetic Act~~lower-~~-Compliance~~cost ~~Policies~~medicines.” This ~~guidance~~policy ~~describes~~suggests ~~FDA’s~~stricter ~~compliance~~governmental ~~policies~~control ~~for~~over ~~enforcement~~pricing ofand ~~requirements for the interoperable~~rebates, ~~electronic,~~creating ~~package~~cost ~~level~~pressure ~~product~~and ~~tracing~~added ~~(enhanced~~compliance ~~drug~~burdens ~~distribution~~for ~~security~~pharmaceutical ~~requirements)~~companies. ~~under the Federal Food~~Additionally, ~~Drug,~~as ~~and~~part ~~Cosmetic~~of ~~Act~~this ~~(FDCA)~~order, ~~effective~~on ~~November~~June 2710, ~~2023. Specifically~~2025, the ~~guidance~~site-of-service ~~described~~executive ~~that,~~directive ~~until~~was ~~November~~issued ~~27,~~instructing ~~2024,~~HHS ~~the~~and ~~FDA~~CMS ~~did not intend~~ to ~~take~~implement ~~action~~“site-neutral” topayment ~~enforce requirements for the interoperable~~policies, ~~electronic,~~attempting ~~package~~to ~~level~~ensure ~~product~~that ~~tracing~~Medicare ~~under~~pays ~~section 582(g)(1) of~~ the ~~FDCA~~same ~~Act~~rate ~~that~~for ~~went~~certain ~~into~~drugs ~~effect~~and onprocedures ~~November~~regardless ~~27,~~of ~~2023.~~whether ~~The~~they ~~FDA~~are ~~issued~~administered ~~an additional guidance document~~ in ~~October~~hospitals ~~2024~~or ~~noting~~outpatient ~~that~~clinics. ~~companies~~This incould ~~the~~reduce ~~pharmaceutical~~reimbursement ~~distribution~~for ~~supply~~higher-cost ~~chain~~hospital ~~who~~settings ~~have initiated their systems~~ and ~~processes~~pressure ~~and~~certain ~~established~~manufacturers ~~electronic DSCSA data connections with their trading partners may need additional time beyond November 27, 2024~~ to ~~strengthen~~cut ~~capabilities~~prices toor ~~mitigate~~face ~~data~~reduced ~~issues~~utilization ~~associated~~as ~~with~~providers ~~electronic~~shift ~~DSCSA~~patients ~~transaction information and transaction statements~~ to ~~ensure~~lower-cost ~~uninterrupted product distribution~~sites. ~~The October 2024 guidance specifies that the FDA is responding to such~~

46On May 12, 2025, the White House issued an Executive Order establishing a Most Favored Nation drug pricing model for prescription drugs. The policy intends to align U.S. drug prices with the lowest prices in other developed countries. This Executive Order requires HHS to communicate MFN drug prices to manufacturers for single-source brand drugs without generic or biosimilar competition. Under this order, HHS is also directed to facilitate direct-to-consumer purchasing programs for

~~Table of ContentsITEM 1A. RISK FACTORS.~~52

~~need~~Table by issuing exemptions to accommodate the additional time needed by such trading partners beyond November 27, 2024, but such exemptions apply only to trading partners who have initiated their systems and processes and established electronic DSCSA data connections with their trading partners prior to November 27, 2024. The guidance also provides that such exemptions will extend beyond November 27, 2024, for different lengths of ~~time~~Contents ~~depending~~ITEM ~~on the category of the trading partner (i~~1A.~~e.,~~ ~~manufacturers~~RISK ~~and repackagers, wholesale distributors, dispensers with 26 or more full time employees)~~FACTORS. ~~As of January 31, 2025, the Trump Administration has not made any updates to, or rescinded, the October 2024 guidance document.~~

~~•In~~manufacturers ~~2016,~~that ~~the~~sell ~~21st~~at ~~Century~~MFN ~~Cures~~prices, ~~Act~~providing ~~(Cures~~Americans ~~Act) was enacted and authorized increased funding for~~ the ~~FDA~~ability to ~~spend~~purchase onat ~~innovation~~the ~~projects,~~lowest ~~amended~~price ~~the~~directly ~~Public~~from ~~Health~~manufacturers. ~~Service~~If ~~Act~~manufacturers ~~(PHSA)~~fail to ~~reauthorize~~achieve ~~and~~such ~~expand~~pricing, ~~funding for~~ the ~~National~~Secretary ~~Institutes~~ of ~~Health~~Commerce ~~(NIH),~~shall ~~established~~propose ~~the~~rulemaking ~~NIH Innovation Fund~~ to ~~pay~~impose ~~for~~MFN ~~the~~pricing, ~~cost~~including ~~of development and implementation of a strategic plan~~by, ~~early~~among ~~stage~~other ~~investigations~~things, ~~and~~importing ~~research;~~from ~~and~~foreign ~~charged~~countries ~~the NIH with leading~~ and ~~coordinating~~modifying ~~expanded~~or ~~pediatric~~revoking ~~research.~~drug ~~The~~approvals ~~Cures Act also directed the Centers~~ for ~~Disease~~unsafe, ~~Control~~ineffective, ~~and~~or ~~Prevention~~improperly tomarketed ~~expand surveillance of neurological diseases~~drugs. ~~There~~It ~~often~~is ~~are~~unknown ~~delays~~at ~~between~~this ~~the~~time ~~enactment~~how ofcourts ~~laws~~will ~~and~~interpret the ~~effective~~Executive ~~date~~Order ofestablishing ~~regulations~~an ~~for~~MFN ~~the~~drug ~~enforcement~~pricing ofmodel ~~laws, and this was the case~~ for ~~the~~prescription ~~Cures Act~~drugs. ~~Although~~Many ~~enacted~~publicized inefforts ~~2016,~~regarding the ~~Department~~Executive ofOrder Health and Human Services (HHS), Office of Inspector General (OIG) did not publish a final rule amending the civil money penalty (CMP) regulations of HHS OIG until July 3, 2023. This final rule implements three statutory provisions: (1) the amendment of the PHSA by the Cures Act authorizing OIG to ~~investigate~~date ~~claims~~have ofbeen ~~information~~undertaken blocking; (2) the amendment of the Civil Monetary Penalties Law (CMPL), authorizing HHS to impose CMPs, assessments, and exclusions upon individual and entities that engage in fraud and other misconduct related to HHS grants, contracts, and other agreements; and (3) the increase in penalty amounts in the CMPL effected by ~~the~~pharmaceutical ~~Bipartisan~~companies ~~Budget~~on ~~Act~~a ofvoluntary ~~2018~~basis.

•The ~~IRA~~federal ~~includes~~government ~~measures~~has ~~intended~~also tolaunched ~~lower the cost of prescription drugs and related healthcare reforms, such as limits on price increases and subjecting an escalating number of drugs to annual price negotiations with CMS~~TrumpRx. ~~Specifically~~gov, ~~the~~a ~~IRA~~prescription ~~authorizes and directs HHS to set~~ drug ~~price~~pricing ~~caps~~platform ~~for~~intended certain high-cost Medicare Part B and Part D qualified drugs, with the initial list of drugs announced on August 29, 2023. The negotiated maximum fair prices for such drugs was announced on August 14, 2024, with the first year of maximum price applicability to ~~begin~~promote ~~in calendar year 2026. There are currently ten drugs subject to government~~ pricing ~~under~~transparency ~~the IRA. The IRA also authorizes HHS to penalize pharmaceutical manufacturers that increase the price of certain Medicare Part B~~ and ~~Part~~discounted Dpurchasing ~~drugs faster than the rate of inflation and creates significant changes to the Medicare Part D benefit design by capping Part D beneficiaries’ annual out-of-pocket spending~~options. OnWhile ~~November~~participation ~~17,~~is ~~2023,~~voluntary ~~CMS released final program guidance to pharmaceutical manufacturers~~ and ~~Part D plan sponsors for implementing~~ the ~~Medicare~~initiative ~~Part~~does Dnot ~~Manufacturer~~currently ~~Discount~~impose ~~Program.~~new ~~HHS~~pricing ~~and CMS are continuing to announce drugs for price negotiation~~mandates, ~~produce~~it draft guidance, and finalize regulations in an effort to implement to IRA. Beginning in 2025, all Medicare prescription drug plans (Medicare Part D plans) — including both standalone Medicare prescription drug plans and Medicare Advantage plans with prescription drug coverage — will be required to offer enrollees the option to pay out-of-pocket prescription drug costs in the form of capped monthly installment payments instead of all at once at the pharmacy. The Company cannot predict whether additional legislation or rulemaking related to the IRA will be issued or enacted, or what impact, if any, such changes will have on the profitability of any of the Company's products. There also may becontribute ~~future changes unrelated~~ to ~~the~~pricing ~~IRA~~pressure ~~that result in reductions in potential coverage and reimbursement levels for the Company's products, and we cannot predict the scope of any future changes~~ or ~~the~~influence ~~impact~~market ~~that those changes may have on its business~~expectations.

Additionally, while many pharmaceutical products are exempt from the Executive Order issued in April 2025 regarding reciprocal, country-specific tariffs, the policy creates uncertainty in import/export flows, supply-chain sourcing, and future tariff risks for pharmaceutical companies. Supplemental orders modifying the scope, rates, and timing of the reciprocal tariffs further indicates that the exemptions, which include pharmaceuticals, may be narrowed or rescinded in the future, exposing pharmaceutical companies to potential tariffs. For example, following the February 2026 Supreme Court decision in Learning Resources, Inc. v. Trump (consolidated with Trump v. V.O.S. Selections), where the Court held that the International Emergency Economic Powers Act does not authorize the President to impose tariffs, the U.S. government imposed a temporary global import surcharge under Section 122 of the Trade Act of 1974. Pharmaceuticals and pharmaceutical ingredients are currently exempt; however, broader tariff measures or changes to existing exemptions could increase supply chain costs or create additional uncertainty that may adversely affect pharmaceutical companies.

Future healthcare reform measures may result in more rigorous coverage criteria and lower reimbursement, and additional downward pressure on the price that the Company receives for any approved product. Any reduction in reimbursement from Medicare or other government-funded programs may result in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms could result in reduced demand for the Company's product candidates or additional pricing pressures and may prevent the Company from being able to generate revenue, attain profitability or commercialize its drugs.

Future healthcare reforms in the U.S. and in other countries could limit the prices that can be charged for the Company's products and product candidates or may otherwise limit its commercial opportunities. The Company cannot predict what additional future changes in the healthcare industry in general, or the pharmaceutical industry in particular, will occur; however, any changes could have a material adverse effect on the Company’s business, cash flow, results of operations, financial condition, and prospects.

Any failure to comply with healthcare regulations, including implementation of any change in compliance with healthcare regulations and laws could cause us to incur significant compliance expenses and any failure to comply could subject us to substantial penalties and fines. Our business, operations, and financial condition could be adversely affected.

47As a supplier of pharmaceuticals, certain U.S. federal and state healthcare laws and regulations pertaining to patients' rights to privacy, fraud and abuse protection, and others, are and will continue to be applicable to our business. We could be subject to allegations of healthcare fraud and abuse, patient privacy violations, as well as other violations of healthcare regulations by both the federal government and the states in which we conduct our business. Regulations to which we are subject include the HealthCare Reform Law and others discussed in Item 1. Business – Government Regulation” and “Item 1. Business – Pharmaceutical Coverage, Pricing, and Reimbursement.

~~Table~~There ofcan ~~ContentsITEM~~be ~~1A.~~no ~~RISK~~assurance ~~FACTORS~~that the Company's business will not be materially harmed by future compliance with or changes to the HealthCare Reform Law.

As a supplier of pharmaceuticals, certain U.S. federal and state healthcare laws and regulations pertaining to patients' rights to privacy, fraud and abuse protection, and others, are and will continue to be applicable to our business. We could be subject to allegations of healthcare fraud and abuse, patient privacy violations, as well as other violations of healthcare regulations by both the federal government and the states in which we conduct our business. Regulations to which we are subject include the HealthCare Reform Law and others discussed below.

The assessment of the financial impact of the HealthCare Reform Law on the Company's business is on-going. There can be no assurance that the Company's business will not be materially harmed by future compliance with or changes to the HealthCare Reform Law.

The HealthCare Reform Law includes various provisions designed to strengthen fraud and abuse enforcement. These include increased funding for enforcement efforts and lowering the intent requirement of the federal anti-kickback statute and criminal healthcare fraud statute, such that a person or entity no longer needs to have actual knowledge or specific intent to violate the statute.

If the Company's past or present operations are found to be in violation of any such laws or any other governmental regulations that may apply to it, then the Company may be subject to penalties, both civil and criminal, damages, fines, exclusion from federal healthcare programs, and/or the curtailment or restructuring of its operations.

In addition, the Company could receive adverse publicity as a result of any such failure to comply with HealthCare Reform Law. Certain provisions of the HealthCare Reform Law have not been fully interpreted by the regulatory authorities or the courts and certain provisions are subject to a variety of interpretations, which may complicate the Company's compliance with the HealthCare Laws. Any action against the Company for violation of the HealthCare Laws, even if successfully defended, could cause the Company to incur significant legal expenses and divert management's attention from the operation of its business.

The Company could be subject to allegations of healthcare fraud and abuse, as well as other violations of healthcare regulations by both the federal government and the states in which the Company conducts its business. Regulations include, but are not limited to:53

~~•The~~Table federal healthcare program Anti-Kickback Statute (AKS), which prohibits, among other things, persons from knowingly and willfully soliciting, receiving or providing remuneration, directly or indirectly, to induce either the referral of anContents ~~individual~~ITEM ~~for an item or service or the purchasing or ordering of a good or service, for which payment may be made under federal healthcare programs such as the Medicare and Medicaid programs~~1A. ARISK ~~person or entity does not need to have actual knowledge or specific intent to violate the federal AKS to have committed a violation~~FACTORS. Further, the government may assert that a claim, including items and services resulting from a violation of the federal AKS, constitutes a false or fraudulent claim for purposes of the federal False Claims Act, as discussed below. On December 2, 2020, additional AKS regulations were finalized and took effect in January 2021, which modified existing AKS safe harbors, created new AKS safe harbors, and created a new CMP law exception. Safe harbors protect certain arrangements from prosecution if each of the elements of the safe harbor is satisfied;

~~•The~~the ~~HHS~~courts ~~OIG~~and ~~Special~~certain ~~Fraud~~provisions ~~Alert~~are ~~published~~subject onto ~~November~~a ~~16,~~variety ~~2020~~of interpretations, which ~~addresses~~may complicate the ~~manufacturer~~Company's ~~Speaker~~compliance ~~Programs,~~with ~~and~~the ~~signals~~HealthCare ~~both~~Reform aLaw. ~~narrower~~Any ~~government~~action ~~view~~against ofthe ~~AKS~~Company ~~compliance~~for ~~with~~violation ~~respect~~of tothe ~~such~~HealthCare ~~programs~~Reform asLaw, ~~well~~even asif ~~the~~successfully ~~potential~~defended, ~~for~~could ~~increased~~cause ~~enforcement~~the inCompany ~~the~~to ~~space~~incur bysignificant ~~government~~legal ~~oversight~~expenses ~~agencies~~and ~~such~~divert asmanagement's ~~OIG~~attention ~~and~~from the ~~Department~~operation of ~~Justice;~~its business.

~~•Federal~~The ~~civil~~Company ~~and~~could ~~criminal~~be ~~false~~subject ~~claims~~to ~~laws~~allegations ~~and~~of ~~civil~~healthcare ~~monetary~~fraud ~~penalty~~and ~~laws~~abuse, ~~which~~as ~~prohibit,~~well ~~among~~as other ~~things:~~violations ~~individuals~~of orhealthcare ~~entities~~regulations ~~from~~by ~~knowingly~~both presenting, or causing to be presented, claims for payment from Medicare, Medicaid, or other third-party payors that are false or fraudulent; knowingly making a false statement material to an obligation to pay or transmit money to the federal government; orand ~~knowingly~~the ~~concealing~~states orin ~~improperly~~which ~~avoiding~~the orCompany ~~decreasing~~conducts anits ~~obligation to pay money to the federal government;~~business.

~~•Federal~~As ~~physician~~a ~~payment~~supplier ~~transparency~~of ~~requirements~~pharmaceuticals, ~~under~~certain ~~the~~U.S. ~~ACA,~~federal ~~commonly~~and ~~referred~~state tohealthcare aslaws ~~the~~and ~~Physician~~regulations ~~Payments~~pertaining ~~Sunshine~~to ~~Act,~~patients’ ~~which~~rights ~~requires~~to ~~manufacturers~~privacy ofapply ~~drugs,~~to ~~devices,~~the ~~biologics,~~Company’s ~~and~~business. ~~medical~~The ~~supplies~~Company tocould ~~report~~be subject to ~~HHS~~allegations ~~information~~of ~~related~~patient toprivacy ~~physician~~violations ~~payments,~~by ~~and~~both tothe ~~report~~federal ~~other~~government ~~transfers~~and ofthe ~~value,~~states ~~physician~~in ~~ownership,~~which ~~and~~the ~~investment~~Company’s ~~interests;~~conducts its business.

~~•Federal~~On ~~price~~October ~~reporting~~30, ~~laws~~2023, the Biden Administration issued an Executive Order on the Safe, Secure, and Trustworthy Development and Use of AI, which ~~require~~addressed the ~~Company~~use toof ~~calculate~~AI in health care and ~~report~~the ~~complex~~safety ~~pricing~~and ~~metrics~~integrity of data stored and generated by AI health care technology systems and directed HHS to ~~government~~establish ~~programs~~an AI Task Force that must, ~~where~~within ~~such~~365 ~~reported~~days ~~prices~~of ~~may~~its becreation, ~~used~~develop inpolicies and specific frameworks addressing the ~~calculation~~use of ~~reimbursement~~AI and~~/or~~ ~~discounts~~AI -enabled technologies in the health sector, including research, drug and device safety, and health care delivery and financing. President Trump rescinded the Biden Administration Executive Order on January 20, 2025 with a new order “Removing Barriers to American Leadership in Artificial Intelligence” issued on January 23, 2025. The new order by the ~~Company's~~Trump ~~commercial~~Administration ~~products;~~emphasizes deregulation and prioritizes American leadership and global dominance in AI innovation.

48Efforts to ensure that the Company's business arrangements will comply with applicable healthcare laws and regulations could be costly. If the Company's operations are found to be in violation of any of the laws described or referenced above or in violation of any governmental regulations that apply to the Company, then it may be subject to penalties, including civil and criminal penalties, damages, fines, and the curtailment, or restructuring of its operations. Any penalties, damages, fines, curtailment or restructuring of the Company's operations could adversely affect its ability to operate its business and impair its financial results.

Table of ContentsITEM 1A. RISK FACTORS.

•Pricing and rebate programs must comply with the Medicaid rebate requirements of the Omnibus Budget Reconciliation Act of 1990, as amended, and the Veterans Health Care Act of 1992, as amended (VHCA). If the Company's products are made available to authorized users of the Federal Supply Schedule of the General Services Administration, additional laws and requirements apply. Under the VHCA, drug companies are required to offer certain pharmaceutical products at a reduced price to several federal agencies, including the United States Department of Veterans Affairs and United States Department of Defense, the Public Health Service, and certain private Public Health Service—designated entities, in order to participate in other federal funding programs including Medicare and Medicaid. Recent legislative changes purport to require that discounted prices be offered for certain United States Department of Defense purchases for its TRICARE program via a rebate system. Participation under the VHCA requires submission of pricing data and calculation of discounts and rebates pursuant to complex statutory formulas, as well as the entry into government procurement contracts governed by the Federal Acquisition Regulations; and

•Similar healthcare laws in the European Union and other jurisdictions, including reporting requirements detailing interactions with and payments to healthcare providers.

As a supplier of pharmaceuticals, certain U.S. federal and state healthcare laws and regulations pertaining to patients’ rights to privacy apply to the Company’s business. The Company could be subject to allegations of patient privacy violations by both the federal government and the states in which the Company’s conducts its business. Regulations include, but are not limited to:

•Effective April 26, 2024, HHS modified certain provisions of the HIPAA Privacy Rule to prohibit the use or disclosure of protected health information by a covered health care provider, health plan, or health care clearing house, or their business associate, to: (i) conduct a criminal, civil, or administrative investigation into or impose criminal, civil, or administrative liability on any person for the mere act of seeking, obtaining, providing, or facilitating reproductive health care, where such health care is lawful under the circumstances in which it is provided; or (ii) identify any person for the purpose of conducting such investigation or imposing such liability;

Efforts to ensure that the Company's business arrangements will comply with applicable healthcare laws and regulations could be costly. If the Company's operations are found to be in violation of any of the laws described above or in violation of any

Table of ContentsITEM 1A. RISK FACTORS.

governmental regulations that apply to us, then it may be subject to penalties, including civil and criminal penalties, damages, fines, and the curtailment, or restructuring of its operations. Any penalties, damages, fines, curtailment or restructuring of the Company's operations could adversely affect its ability to operate its business and could impair its financial results.

Although compliance efforts can mitigate the risk of investigation and prosecution for violations of these laws, the risks cannot be entirely eliminated. The risk of violating a law can increase when governmental interpretations and rule-making necessitate operating changes. Any action against the Company for violation of these laws, even if successfully defended, could cause the Company to incur significant legal expenses and divert management's attention from the operation of its business. Moreover, achieving and sustaining compliance with applicable federal and state privacy, security, and fraud laws may prove costly.

Guidelines and recommendations published by various organizations can reduce the use of our products and product candidates.

Government agencies promulgate regulations and guidelines directly applicable to us and to our products and product candidates that could affect the use of our products. In addition, professional societies, practice management groups, private health and science foundations, and organizations involved in various diseases from time to time may also publish guidelines or recommendations to the health care provider and patient communities. Recommendations from government agencies or these other groups or organizations may relate to such matters as usage, dosage, route of administration, and use of concomitant therapies. Recommendations or guidelines suggesting the reduced use of our products, or the use of competitive or alternative products which are subsequently followed by patients and health care providers, could result in decreased use of our products.

We could be involved in additional lawsuits to protect or enforce our patents, which could be expensive, time consuming, distracting, and ultimately unsuccessful.

Competitors may infringe our patents. To counter infringement or unauthorized use, in the past we have been, and in the future we may again be, required to file infringement claims, which can be expensive and time consuming. For example, we are involved in several matters related to Paragraph IV Certification Notice Letters that we received in connection with our products and our collaborators' products. In connection with an ANDA, a Paragraph IV Certification Notice Letter notifies the FDA that one or more patents listed in the FDA's Orange Book is alleged to be invalid, unenforceable, or will not be infringed by the competitive ANDA product.

For example, we have received Paragraph IV Notice Letters from generic drug makers directed to the Orange Book patents of several of our products. We have filed lawsuits against the generic drug makers and intend to vigorously enforce our intellectual property rights relating to our products.

Table of Contents
ITEM 1A. RISK FACTORS.

For more information, refer to Part I, Item 3—Legal Proceedings contained in this Annual Report Form 10-K.

In any infringement proceeding, a court may decide that a patent of ours is not valid or enforceable, or the court may refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result in any litigation or defense proceedings could put one or more of our patents at risk of being invalidated or interpreted narrowly and could put our patent application at risk of not issuing.

Interference or derivation proceedings ~~brought~~instituted by the USPTO may be necessary to determine the priority or inventorship of inventions with respect to our patents and patent applications or the patents of our collaborators. An unfavorable outcome could require us to cease using the technology or to attempt to license rights to it from the prevailing party. Our business could be harmed if a prevailing party does not offer us a license on terms that are acceptable to us or offer terms at all. Litigation or interference proceedings may fail. Even if successful, litigation may result in substantial costs and distract our management and other employees. We may not be able to prevent, alone or with our collaborators, misappropriation of our proprietary rights, particularly in countries where the laws may not protect those rights as fully as they are protected in the U.S.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation.

In addition, there could be public announcements of the results of hearings, motions, or other interim proceedings or developments. If securities analysts or investors perceive these results to be negative or perceive that the presence or continuation of these cases creates a level of uncertainty regarding our ability to increase or sustain product sales, it could have a substantial adverse effect on the price of our common stock.

There can be no assurance that our product candidates will not be subject to the same risks.

Table of ContentsITEM 1A. RISK FACTORS.

Limitations on our patent rights relating to our products and product candidates may limit our ability to prevent third parties from competing with us.

To a significant degree, our success will depend on our ability to obtain and maintain patent protection for: our proprietary technologies; for both our products and product candidates; to preserve our trade secrets; to prevent third parties from infringing upon our proprietary rights; and to operate without infringing upon the proprietary rights of others. To that end, we seek patent protection in the U.S. and internationally for our products and product candidates. Our policy is to actively seek to protect our proprietary positions by, among other things, filing patent applications in the U.S. and abroad (including Europe, Canada, and certain other countries when appropriate) relating to proprietary technologies that are important to the development of our business.

The strength of patents in the pharmaceutical industry involves complex legal and scientific questions and can have uncertain results. Patent applications in the U.S. and most other countries are confidential for a period of time until they are published. Publication of discoveries in scientific or patent literature typically lags actual discoveries by several months or more. As a result, we cannot be certain that we were the first to conceive inventions covered by our patents and pending patent applications or that we were the first to file patent applications for such inventions. In addition, we cannot be certain that our patent applications will be granted; that any issued patents will adequately protect our intellectual property; or that such patents will not be challenged, narrowed, invalidated, or circumvented.

We also rely upon unpatented trade secrets, unpatented know-how, and continuing technological innovation to develop and maintain our competitive position, which we seek to protect, in part, by confidentiality agreements with our employees, with our collaborators, and with our consultants. We also have agreements with our employees and selected consultants that obligate them to assign their inventions to us.

It is possible that technology relevant to our business will be independently developed by a person that is not a party to such an agreement. Furthermore, if the employees and consultants that are parties to these agreements breach or violate the terms of these agreements, we may not have adequate remedies. We could lose our trade secrets through such breaches or violations. Further, our trade secrets could otherwise become known or could be independently discovered by our competitors. Any failure to adequately prevent disclosure of our trade secrets and other proprietary information could have a material, adverse impact on our business.

In addition, the laws of certain foreign countries do not protect proprietary rights to the same extent or in the same manner as the U.S. Therefore, we may encounter problems in protecting and defending our intellectual property in certain foreign jurisdictions.

Table of Contents
ITEM 1A. RISK FACTORS.

If we are sued for infringing the intellectual property rights of third parties, it could be costly and time consuming to defend such a suit. An unfavorable outcome in such litigation could have a material adverse effect on our business.

Our commercial success depends upon our ability, and the ability of our collaborators, to develop, manufacture, market and sell our approved products and our product candidates and to use our proprietary technologies without infringing the proprietary rights of third parties.

The numerous U.S. and foreign issued patents and pending patent applications owned by third parties, exist in the fields in which we and our collaborators are developing product candidates. As the pharmaceutical industry expands and more patents are issued, the risk increases that our collaborators' approved products, or our product candidates, may give rise to claims of infringement of the patent rights of others. There may be issued patents of third parties that we are currently unaware of and that may be infringed by our products or our collaborators' approved products. These patents could prevent us from being able to maximize revenue generated by our products or our product candidates. Because patent applications can take many years to issue, there may be pending patent applications, which may later result in issued patents. Our collaborators' approved products, our products, or our product candidates may infringe those issued patents.

We may be exposed to or threatened with future litigation by third parties alleging that our collaborators' approved products, our products, or product candidates infringe their intellectual property rights. If one of our collaborators' approved products, our products, or our product candidates is found to infringe the intellectual property rights of a third party, we or our collaborators could be enjoined by a court and required to pay damages. In such an event, we could be prevented from commercializing the applicable approved products or product candidates unless we obtain a license to the patent. A license may not be available to us on acceptable terms, if at all. In addition, during litigation, the patent holder could obtain a preliminary injunction, or other equitable relief, which could prohibit us from making, using, or selling our approved products prior to a trial. Such a trial may not occur for several years.

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There is a substantial amount of litigation involving patent and other intellectual property rights in the pharmaceutical industry. If a third party claims that we or our collaborators infringe its intellectual property rights, we may face a number of issues, including, but not limited to:

•Infringement and other intellectual property claims which, regardless of merit, may be expensive and time-consuming to litigate, and which may divert our management's attention from our core business;

•Substantial damages for infringement, which we may have to pay if a court decides that the product at issue infringes on or violates the third party's rights. If the court finds that the infringement was willful, we could be ordered to pay treble damages and pay the patent owner's legal fees;

•Court rulings prohibiting us from selling our products or product candidates, unless the third party licenses its rights to us, which it is not required to do;

•If a license is available from a third party, we may have to pay substantial royalties, fees or grant cross-licenses to our intellectual property rights; and

•Incurring the costs and expending the time necessary to defend against such litigation; and

•Redesigning our products or product candidates so they do not infringe. This may not be possible or may require substantial monetary expenditures and time.

We face potential litigation and product liability exposures. If successful claims are brought against us, we may incur substantial liabilities.

In recent years, the volume and variety of claims and the amount of damages claimed in litigation against the pharmaceutical industry have increased. For example, in recent years we or our subsidiaries have been involved in litigations alleging violation of federal and state false claims acts and antitrust laws. For more information, refer to Part I, Item 3 - Legal Proceedings contained in this Annual Report Form 10-K. While we strive to conduct our business in accordance with applicable laws, we nevertheless remain exposed to litigation risk. We could be sued by many different parties, including, for example, consumers, healthcare providers, or others selling or otherwise coming into contact with our products and product candidates. Lawsuits or investigations that we may become involved in could be very expensive. These claims may be highly damaging to our reputation, even if the underlying claims are without merit, thereby adversely affecting our business.

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The use of our product candidates in clinical trials and the commercial sale of any of our products expose us to the risk of product liability claims. If we cannot successfully defend ourselves against product liability claims, we could incur substantial liabilities. In addition, product liability claims may result in:

•Decreased demand for a commercial product;

•Impairment of our business reputation and exposure to adverse publicity;

•Withdrawal of bioequivalence and/or clinical trial participants;

•Initiation of investigations by regulators;

•Costs related to litigation;

•Distraction of management's attention from our primary business;

•Substantial monetary awards to patients or other claimants;

•Loss of revenues; and

•Our inability to commercialize products for which we are obtaining marketing approval.

Our product liability insurance coverage for our clinical trials is limited to $30 million per claim and $30 million in the aggregate. Insurance covers bodily injury and property damage arising from our clinical trials, subject to industry-standard terms, conditions, and exclusions. On occasion, large judgments have been awarded in class action lawsuits for drugs that had unanticipated side effects. In the future, the potential inability to obtain sufficient product liability insurance at an acceptable cost, or at all, to protect against potential product liability claims could prevent or inhibit the development and commercialization of the pharmaceutical products we develop.

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or at all, to protect against potential product liability claims could prevent or inhibit the development and commercialization of the pharmaceutical products we develop.

As we continue to increase the size of our organization, we may experience difficulties in managing growth.

Our personnel, systems and facilities currently in place may not be adequate to support future growth. Our future financial performance and our ability to compete effectively will depend, to a significant degree, on our ability to effectively manage our recent and any future growth. We increased employee headcount from ~~652~~674 employees in ~~2023~~2024 to ~~674~~778 employees in ~~2024~~2025. Our need to effectively execute our growth strategy requires that we:

•Manage regulatory approvals and clinical trials effectively;

•Manage our internal developmental efforts efficiently while complying with our contractual obligations to licensors, licensees, contractors, collaborators, and other third parties;

•Commercialize our product candidates;

•Continue to grow our pipeline;

•Target strategic business development opportunities;

•Improve our operational, financial, and management controls, financial reporting systems and procedures; and

•Attract, retain and motivate sufficient numbers of talented employees with the requisite skills and experience.

This growth could place a strain on our administrative and operational infrastructure and may require our management to divert a disproportionate amount of its attention away from our day-to-day activities. We may not be able to effectively manage the expansion of our operations or to recruit, train, and retain additional qualified personnel, particularly in an inflationary economic environment. This may result in weaknesses in our infrastructure; give rise to operational mistakes; loss of business opportunities; loss of employees; and reduced productivity.

We may not be able to make improvements to our management information and control systems in an efficient or timely manner and may discover deficiencies in existing systems and controls. In addition, our growth will cause us to comply with an increasing number of regulations and statutory requirements. If our management is unable to effectively manage our expected growth, our expenses may increase more than expected; our ability to generate or increase our revenues could be impaired; and we may not be able to implement our business strategy.

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Cybersecurity incidents may adversely impact our financial condition, results of operations, and reputation. Security breaches and other disruptions could compromise our information and expose us to liability which would cause our business and reputation to suffer.

Our operations involve the use of multiple systems that process, store and transmit sensitive information about our customers, suppliers, employees, financial position, ~~operating~~operations ~~results,~~ and strategies. In the ordinary course of our business, we or our vendors collect and store sensitive data in our or their data centers and ~~on our~~ networks, including: intellectual property; proprietary business information; proprietary information of our customers, suppliers, and business partners; and ~~identifiable~~ personal information of our employees, ~~and~~ patients in our clinical trials, and other individuals. Hardware, software, or applications we develop or procure from third parties or through open source solutions may contain defects in design or other problems that could unexpectedly compromise information security. Additionally, cyberattacks or security breaches, such as the 2021 ransomware attack, could compromise confidential ~~client~~or proprietary information, ~~confidential~~personal ~~employee~~ information or other sensitive data, cause a disruption or delay in our operations, harm our reputation, result in improper use of our systems and networks, the manipulation and destruction of data, or the release of defective products and may otherwise expose us to liability, including as a result of the release of third party information improperly obtained from our systems, any of which in turn could negatively impact our business, financial results, reputation and the value of our common shares. We have and continue to implement measures designed to safeguard our systems and information and mitigate potential risks, but there is no assurance that such actions will be sufficient to prevent cyberattacks, security breaches, or other disruptions that manipulate or improperly use our systems, compromise sensitive information, destroy or corrupt data, or otherwise disrupt our operations. The occurrence of such events, including ~~additional~~ breaches of our security measures or those of our third-party service providers, could negatively impact our reputation and our competitive position and could result in litigation with third parties, regulatory action, loss of business due to disruption of operations, ~~and/or~~ reputational damage, potential liability, and/or increased remediation and protection costs, any of which could have a material adverse effect on our financial condition and results of operations. Any future attacks or other security breaches could also cause us to incur remediation costs with respect to our information technology systems, as occurred following the 2021 ransomware attack. Additionally, a cyberattack, security breach, or other incident may remain undetected for an extended period of time, potentially escalating the adverse effects of any such incident.

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could also cause us to incur remediation costs with respect to our information technology systems, as occurred following the 2021 ransomware attack. Additionally, a cyberattack, security breach, or other incident may remain undetected for an extended period of time, potentially escalating the adverse effects of any such incident.

The continued occurrence of high-profile data breaches provides evidence of an external environment which is increasingly hostile to information security and to the secure processing, maintenance, and transmission of information critical to our operations and business strategy.

In response to a cyberattack or security breach, as was the case following the 2021 ransomware attack, we may accelerate previously planned information technology investments in ways designed to improve our information security and technology infrastructure. We have incurred costs and expect to continue to incur costs in the future, which may be significant, in connection with efforts designed to enhance our data security and take further steps designed to protect against unauthorized access to, or manipulation of, our systems and data. In response to any future cyberattack or security breach we may further increase our information technology investments.

Despite our security measures, our information technology and infrastructure may be vulnerable to additional attacks ~~breached~~ due to employee error, malfeasance, or other disruptions. It is possible that the security controls we have implemented to safeguard personal data and our networks, train our employees and vendors on data security, and implement security requirements and other practices may not prevent the compromise of our networks or the improper disclosure of data that we or our vendors store and manage. Unauthorized parties may also attempt to gain access to our systems or facilities, or those of third parties with whom we do business, through fraud, trickery, or other forms of deceiving our employees, contractors, and vendors. If we, our vendors, or other third parties with whom we do business experience significant data security breaches or fail to detect and appropriately respond to significant data security breaches, we could be exposed to government enforcement actions. Improper disclosure could also harm our reputation, create risks for customers, or subject us to liability under laws that protect personal information. This could adversely affect our business, revenues, and competitive position.

While integrating acquired businesses and operations and upgrading the Company's information technology systems, we may face an elevated cybersecurity risk.

Since 2023, we have cyber insurance in addition to our business insurance coverage, however, prior to that time we self-insured by assuming the full risk of costs related to cybersecurity incidents. Such cyber insurance does not provide coverage for incidents that occurred before 2023. There can be no assurance that our insurance coverage will be sufficient to cover the full impact of a cyberattack or that it can be renewed in the future at favorable terms, or at all.

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We face significant competition in attracting and retaining talented employees. Further, managing succession for and retention of key executives is critical to our success. Our failure to do so could have an adverse impact on our future performance.

We are highly dependent upon skilled personnel in key parts of our organization, and we invest heavily in recruiting, training, and retaining qualified individuals. The loss of the service of key members of our organization, including senior members of our scientific and management teams, high-quality researchers, development specialists, and skilled personnel, could delay or prevent the achievement of major business objectives. Our future growth will demand talented employees and leaders, yet the market for such talent has become increasingly competitive. In addition, our ability to hire qualified personnel also depends on our flexibility to reward superior performance and to pay competitive compensation. In our industry, during the current inflationary economic environment, compensation levels for qualified personnel and competition among employers to recruit and retain such personnel have and continue to increase.

We may not be able to attract or motivate qualified management, scientific and clinical personnel in the future due to the intense competition for qualified personnel among biotechnology, pharmaceutical, and other businesses. Our industry has experienced a high rate of turnover of management personnel in recent years. If we are not able to attract and motivate key personnel to accomplish our business objectives, we may experience constraints that may significantly impede the achievement of our objectives.

Effective succession planning is also important to our long-term success. Failure to ensure effective transfer of knowledge and smooth transition involving key employees and members of our management team could hinder our strategic planning and business execution. In addition, our failure to adequately plan for succession of senior management and for other key management roles, or the failure of key employees to successfully transition into new roles, could have a material adverse effect on our business and results of operations.

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We are highly dependent on the development, regulatory, commercial, and financial expertise of our management, particularly Jack A. Khattar, our President and Chief Executive Officer. Mr. Khattar has an employment agreement with us. Other members of the senior management team have executive retention agreements with us, but these agreements do not guarantee the services of these executives will continue to be available to us. If we lose key members of our management team, we may not be able to find suitable replacements in a timely fashion, if at all. We cannot be certain that future management transitions will not disrupt our operations or will not generate concern among employees and those with whom we do business.

In addition to competition for personnel, our corporate offices are located in the greater Washington D.C. metropolitan area, an area that is characterized by a high cost of living. As such, we could have difficulty attracting experienced personnel to our Company and may be required to expend significant financial resources in our employee recruitment efforts. As a result, despite significant efforts on our part, we may be unable to attract and retain qualified individuals in sufficient numbers, which could have an adverse effect on our business, financial condition, and results of operations.

Our business involves the use of hazardous materials, and we must comply with environmental laws and regulations. This can be expensive and restrict how we do business.

Our activities and the activities conducted by our third-party manufacturers and suppliers involve the controlled storage, use, and disposal of hazardous materials. We and our manufacturers and suppliers are subject to federal, state, city, and local laws and regulations governing the use, manufacture, storage, handling, and disposal of these hazardous materials. Although we believe that the safety procedures we use for handling and disposing of these materials comply with the standards prescribed by applicable laws and regulations, we cannot eliminate the risk of accidental contamination or injury from these materials. In the event of an accident, local, city, state, or federal authorities may curtail the use of these materials and may interrupt our business operations, including our commercialization, research and development efforts. Although we believe that the safety procedures utilized by our third-party manufacturers for handling and disposing of these materials generally comply with the standards prescribed by applicable laws and regulations, we have no direct control over our third-party manufacturers, and therefore cannot guarantee that this is the case. We can eliminate the risk of accidental contamination or that such safety procedures will prevent injury from these materials. In such an event, we may be held liable for any resulting damages. Such liability could exceed our resources.

We do not currently maintain biological or hazardous materials insurance coverage. While we have implemented processes and procedures to ensure that the suppliers we use are complying with all applicable regulations, there can be no assurance that such suppliers in all instances will comply with such processes and procedures or otherwise comply with applicable regulations. Noncompliance could result in our marketing and distribution of contaminated, defective, or dangerous products, which could subject us to liabilities. This could result in the imposition by governmental authorities of procedures or penalties that ~~could restrict or eliminate our ability to sell products. Any or all of these effects could adversely affect our business, financial condition, and results of operations.~~

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could restrict or eliminate our ability to sell products. Any or all of these effects could adversely affect our business, financial condition, and results of operations.

Provisions in our agreement with Shire, or its successor, Takeda Pharmaceutical Company Limited, impose restrictive covenants on us, which could limit our ability to operate effectively in the future.

In 2005, we purchased substantially all of the assets of Shire Laboratories Inc., the predecessor of Supernus Pharmaceuticals. Under the purchase agreement, we agreed to refrain perpetually from engaging in any research, formulation development, analytical testing, manufacture, technology assessment, or oral bioavailability screening that relate to five specific drug compounds (i.e., amphetamine, carbamazepine, guanfacine, lanthanum, and mesalamine), and any derivative thereof. Although these various restrictions and covenants on us do not currently impact our products, product candidates, or business, they could in the future limit or delay our ability to take advantage of business opportunities that may relate to such compounds.

The Company’s financial condition and results of operations may be materially and adversely affected by health pandemics.

Any future pandemic may result in workforce limitations and travel restrictions resulting from related government actions taken to contain the spread of the disease, any of which may impact many aspects of our business. If a significant percentage of our workforce is unable to work, including because of illness or travel or government restrictions in connection with the pandemic, our operations may be negatively impacted. During a pandemic, government restrictions and social distancing guidelines may drive an increased reliance on working from home for our employees. For example, during the COVID-19 pandemic, the Company’s sales force was functioning largely utilizing digital engagement tools, tactics, and virtual detailing, which may be less effective than the Company's ordinary course sales and marketing programs. In addition, during a pandemic, patients may not be able to get their prescriptions or visit their physicians, which in turn could adversely impact the prescription volumes of our commercial products. Similarly, investigative sites, subjects in clinical trials, and vendors that include our contract research organizations may be subject to the same workforce limitations and travel restrictions during a pandemic. As a result, during a pandemic, we may experience delays or disruptions in our preclinical studies, clinical studies, and non-clinical experiments due to unforeseen circumstances, including but not limited to, interruption of key clinical trial activities, such as clinical trial site data monitoring, and interruption of clinical trial subject visits and study procedures.

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during a pandemic, we may experience delays or disruptions in our preclinical studies, clinical studies, and non-clinical experiments due to unforeseen circumstances, including but not limited to, interruption of key clinical trial activities, such as clinical trial site data monitoring, and interruption of clinical trial subject visits and study procedures.

The Company may also experience other unknown impacts from a pandemic that cannot be predicted. We may also experience delays in receiving supplies of our product candidates from our contract manufacturing organizations due to staffing shortages, production slowdowns, stoppages, or disruptions in delivery systems.

The Company may also require an increased level of working capital if it experiences extended billing and collection cycles as a result of displaced employees at the Company, payors, revenue cycle management contractors, or otherwise. In addition, any disease outbreak could result in a widespread health crisis that could adversely affect the U.S. economy and financial markets, resulting in an economic downturn that could affect customers' demand for our products and our ability to raise additional capital or obtain financing on favorable terms.

The Company may experience delays in receipt of financial information, which may preclude timely reporting of financial results to investors and to the U.S. Securities and Exchange Commission.

Accordingly, disruptions to the Company's business as a result of a pandemic could result in a material adverse effect on the Company's business, results of operations, financial condition, and prospects in the near and long terms.

There can be no assurance that any of the Company's plans will be effective in mitigating the effects of a pandemic on our business operations and consequently the potential material adverse impact on our anticipated revenue, earnings and liquidity.

~~Compliance~~Ongoing ~~with~~legal ~~the~~actions ~~terms~~ and ~~conditions~~proceedings ofcould ~~our~~distract ~~Corporate Integrity Agreement requires significant resources and~~ management ~~time~~ and, ~~if we fail to comply, we~~ could beresult ~~subject~~in tosubstantial ~~penalties~~costs or, ~~under~~large ~~certain~~judgments ~~circumstances,~~against ~~excluded~~Supernus ~~from~~or ~~government~~one ~~healthcare~~or ~~programs,~~more ~~which~~of ~~would~~its ~~materially adversely affect our business~~subsidiaries.

WeFrom ~~are~~time ~~subject~~ to atime ~~CIA requiring a number of extensive obligations relating to the establishment~~ and ~~ongoing~~in ~~maintenance of an effective compliance program. Maintaining~~ the ~~broad~~ordinary ~~array~~course of ~~processes~~business, ~~policies~~Supernus ~~and~~Pharmaceuticals, ~~procedures~~Inc. ~~necessary~~(Parent) ~~to comply with the CIA will require a significant portion of management's attention~~ and ~~the~~any ~~application~~ of ~~significant~~its ~~resources.~~subsidiaries ~~The~~are ~~costs associated with implementation of~~ and ~~compliance with the CIA could be substantial and~~ may be ~~greater~~subject ~~than~~to weadditional ~~currently anticipate. While we have developed and instituted a corporate compliance program~~claims, ~~we cannot guarantee that we~~charges, ~~our~~enforcement ~~employees,~~actions ~~our consultants or our contractors are or will be in compliance with all potentially applicable U.S. federal regulations~~ and ~~laws and all requirements of the CIA~~litigation. In the event of a breach of the CIA, we could become liable for payment of certain stipulated monetary penalties or could be excluded from participation in federal health care programs. The costs associated with compliance with the CIA, or any liability or consequences associated with its breach, could have an adverse effect on our business, revenues, earnings and cash flows.

For example, prior to Parent’s acquisition of Sage Therapeutics, Inc. (Sage) on July 31, 2025, in August 2024, a plaintiff filed a purported federal securities class action lawsuit in the Southern District of New York, or the Securities Class Action, against Sage and certain of its executive officers, or the Securities Class Action. Pursuant to a statutorily prescribed process, the court appointed two new class representatives, Steamfitters Local 449 Pension & Retirement Security Funds and Trust of the Retirement System of the UPR, who filed an amended complaint in March 2025 against the original defendants and certain

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additional former officers of Sage. The amended complaint in the Securities Class Action alleges violations of U.S. securities laws under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, or the Exchange Act, and Rule 10b-5 promulgated thereunder and seeks an as-yet unspecified amount of damages allegedly sustained by parties who purchased Sage stock between April 12, 2021 and July 23, 2024, as well as applicable attorneys’ fees and costs. On April 17, 2025, Sage, along with all of the individual defendants, filed a motion to dismiss the Securities Class Action in the Southern District of New York.

In addition, Sage received a subpoena from the Enforcement Division of the SEC in October 2024, requesting documents and information related to its NDA for zuranolone for the treatment of MDD, including communications with the FDA and any communications containing material nonpublic information.

Also, in March 2025, plaintiff shareholder Qingping Zhu commenced derivative litigation in the Southern District of New York, purportedly on behalf of Sage, against fifteen of its current and former officers and directors (the Zhu Derivative Litigation). Based significantly on the allegations underlying the Securities Class Action, the Zhu Derivative Litigation alleges violations of Section 14(a) of the Exchange Act and Rule 14a-9 promulgated thereunder, breaches of fiduciary duty, unjust enrichment, and waste of corporate assets, and seeks unspecified damages and various equitable relief. On April 14, 2025, the Southern District of New York granted a stay of the Zhu Derivative Litigation pending the resolution of the motion to dismiss the amended complaint in the Securities Class Action. On June 20, 2025, Sage, along with other relevant parties, submitted for the Southern District of New York’s approval a consolidation of the Zhu Derivative Litigation with two other related derivative litigations and the court approved such consolidation (the Consolidated Derivative Litigation).

At this time, neither we nor Sage are able to predict the outcome of the Securities Class Action, the SEC investigation, or the Consolidated Derivative Litigation, or reasonably estimate a range of possible losses, nor are we able to predict the outcome other litigation we or any of our subsidiaries are involved in or may be involved in in the future. For more information regarding litigation we or any of our subsidiaries are involved in, refer to Part I, Item 3—Legal Proceedings in this Annual Report on Form 10-K. If any of these matters are concluded in a manner adverse to us or any of our subsidiaries and for which the relevant entity incur substantial costs or damages not covered by liability insurance, such a conclusion could have a material adverse effect on our consolidated financial condition and business. In addition, any of these matters could adversely impact us or the relevant subsidiary’s reputation and divert management’s attention and resources from other priorities, including the execution of business plans and strategies that are important to our ability to grow our business, any of which could have a material adverse effect on our business.

Our future business prospects for ZURZUVAE® (zuranolone) depend on our ability, with our collaboration partner, Biogen MA Inc., and Biogen International GmbH, or together, Biogen, to successfully commercialize ZURZUVAE® (zuranolone) for the treatment of women with postpartum depression, or PPD, in the U.S. There is no assurance that our commercialization efforts in the U.S. with respect to ZURZUVAE for the treatment of women with PPD will be successful or that we will be able to generate revenues at the levels or on the timing we expect or at levels or on the timing necessary to support our goals.

Our business prospects for ZURZUVAE currently depends on our ability, along with our collaboration partner, Biogen, to successfully continue to commercialize ZURZUVAE in the U.S. for the treatment of women with PPD. ZURZUVAE was approved by the United States Food and Drug Administration, or FDA, in August 2023 as a treatment for adults with PPD and became commercially available in the U.S. in December 2023. ZURZUVAE is the first oral treatment specifically indicated for adults with PPD. We may never be able to meet our expectations with respect to revenues or profits from sales. ZURZUVAE may not achieve, or, even if achieved, maintain, broad market acceptance. Healthcare professionals may decide not to use ZURZUVAE as a treatment option for their patients with PPD or may only consider prescribing ZURZUVAE for a subset of women with PPD in their practice who they consider to have particularly severe symptoms relative to other patients suffering from this disease. ZURZUVAE may not achieve broad brand awareness and adoption among healthcare professionals, including OBGYNs, and our beliefs about the potential for OBGYNs to utilize ZURZUVAE at the forefront of postpartum care may prove to be incorrect. ZURZUVAE also may not achieve or, even if achieved, maintain broad market acceptance among women with PPD who may decide that they do not want to be treated with ZURZUVAE, including due to concern about the safety and tolerability profile of ZURZUVAE or use of ZURZUVAE while breastfeeding. ZURZUVAE includes a boxed warning that instructs healthcare professionals to advise patients that ZURZUVAE causes driving impairment due to central nervous system depressant effects, and that people who take ZURZUVAE should not drive a motor vehicle or engage in other potentially hazardous activities requiring complete mental alertness until at least 12 hours after ZURZUVAE administration for the duration of the once-daily, 14-day treatment course, which could decrease willingness to prescribe or use ZURZUVAE. The label also includes information about adverse events and other warnings and precautions that may cause a woman with PPD not to consider ZURZUVAE as a treatment option.

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ZURZUVAE also may not achieve or, even if achieved, maintain broad market acceptance for the treatment of women with PPD if payors are not willing to cover and provide reimbursement for the treatment or impose significant restrictions on reimbursement. Payors that currently have favorable coverage for ZURZUVAE for the treatment of women with PPD may decide to change their policies and limit coverage or reimbursement for ZURZUVAE, including by requiring women with PPD to try other treatments prior to ZURZUVAE, requiring a specific showing of symptom severity with the use of measurement scales, requiring prior consultation with a psychiatrist or other specialist, or imposing other onerous prior authorization requirements, or they may deny coverage or reimbursement for other reasons or in all cases. Some payors currently require that healthcare professionals attest that the women with PPD for whom they have prescribed ZURZUVAE have severe symptoms. In addition, even if a healthcare professional writes a prescription for ZURZUVAE for the treatment of a woman with PPD, the prescription may not result in product being shipped to the patient and/or the patient taking ZURZUVAE. The healthcare professional or the patient may, for example, not take the steps necessary to obtain reimbursement or to have the prescription filled at the specialty pharmacy or may find the process of obtaining a prescription through the specialty pharmacy too slow or complicated. There is no guarantee that the infrastructure, systems, processes, policies, relationships or materials we and Biogen have built for the commercialization of ZURZUVAE for the treatment of women with PPD in the U.S. will be sufficient for us to achieve or, even if achieved, maintain success. ZURZUVAE also may not achieve the clinical benefit we expect in women with PPD. Our commercialization of ZURZUVAE in PPD may be negatively impacted by competition from other drugs currently on the market or that may be approved in the future. The number of women with PPD, the unmet need for additional treatment options for women with PPD, and the potential market for ZURZUVAE may be significantly smaller than we expect, or we may encounter other market-related issues in the commercialization of ZURZUVAE for the treatment of women with PPD, including as a result of the price we charge. We and our collaboration partner, Biogen, may not be applying the optimal resources to the launch of ZURZUVAE or we or Biogen may not be able or willing to scale our resources at the right time or at an effective level.

Risks Related to Our Finances and Capital Requirements

Tariffs may increase our costs.

We rely on suppliers and other vendors located outside of the United States, including third-party clinical manufacturing organizations for the supply of active product ingredients for our products and product candidates, including raw materials and drug substances for our preclinical research and clinical trials. The United States and other countries have recently announced the imposition of tariffs on the import of a wide variety of products and services. Certain countries have also announced changes to previously announced tariffs. The United States has also announced the possibility of imposing additional tariffs, including specifically on pharmaceutical products. These tariffs may increase the costs we bear when importing products into the United States and may also increase our vendors' production costs, which may be passed on to us. We are assessing the potential impact of recently announced and potential tariffs on our financial results.

Our operating results may fluctuate significantly.

We expect that any revenue we generate will fluctuate from quarter to quarter and year to year as a result of the revenue generated from approved products, license agreements, development milestones, and collaboration license agreements.

Our net earnings (loss) and other operating results will be affected by numerous factors, including:

• The level of market acceptance for any approved product candidate, underlying demand for our products, and wholesalers' buying patterns;

• Variations in the level of expenses related to our development programs;

• The success of our product development and clinical trial activities through all phases of clinical development;

• Our execution of any collaborative, licensing, or similar commercial arrangements, and the timing of payments we may make or receive under these arrangements;

• Any delays in regulatory review and approval of product candidates in clinical development;

• The timing of any regulatory approvals, if received, of additional indications for our existing products;

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• Potential side effects of our products and our future products that could delay or prevent commercialization, cause an approved drug to be taken off the market, or result in litigation;

• Any intellectual property infringement lawsuit in which we may become involved;

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• Our ability to maintain an effective sales and marketing infrastructure;

• Our dependence on third-party manufacturers to supply or manufacture our products and product candidates;

• Competition from existing products, new products, or potential generics to our products or to competitive products that may emerge;

• Regulatory developments affecting our products and product candidates;

• Increased costs as a result of inflation, unstable economic conditions and geopolitical events, including increases in compensation and professional expenses, cost of goods sold, and research and development expenses;

• Changes in reimbursement environment and regulatory changes; and

•Changes in the size of our investment portfolio, borrowings and interest rates.

Due to the various factors mentioned above, and others, the results of any prior quarterly period should not be relied upon as an indication of our future operating performance. If our quarterly operating results fall below the expectations of investors or securities analysts, the price of our common stock could decline substantially. Furthermore, any quarterly fluctuations in our operating results may, in turn, cause the price of our stock to fluctuate substantially.

Our ability to use our net operating loss carryforwards and other tax attributes may be limited or may expire prior to utilization.

Our ability to utilize our U.S. federal and state net operating losses isand other tax attributes are currently limited and may be limited further, under ~~Sections~~various ~~382~~sections of the Internal Revenue Code of 1986, as amended (Code) such as Section 382 and Section 383. ~~The~~Section 382 and Section 383 limitations apply if an ownership change, as defined by Section 382 and Section 383, occurs. Generally, an ownership change occurs when certain shareholders change their aggregate ownership position by more than 50 percentage points over their lowest ownership percentage in a testing period, which is typically three years, or since the last ownership change. Our acquired tax attributes are subject to Section 382 and 383 limitations. As of December 31, ~~2024~~2025, we had U.S. federal net operating loss carryforwards of approximately $~~340~~2.65 ~~million~~billion. Future changes in stock ownership may also trigger an additional ownership change and, consequently, ~~another~~additional Section 382 ~~limitation~~and Section 383 limitations.

~~Any~~In ~~limitation~~addition, ~~may~~Section ~~result~~174 ~~in expiration~~ of athe ~~portion~~Code ofdetermines the ~~net~~timing ~~operating~~of ~~loss~~deduction orof ~~tax~~research ~~credit~~and ~~carryforwards~~experimental ~~before~~(R&E) ~~utilization~~expenditures, ~~which~~with ~~would~~recent ~~reduce~~changes ~~our~~allowing ~~gross~~immediate ~~deferred~~expensing ~~income~~of ~~tax~~domestic ~~assets.~~research Asand adevelopment ~~result,~~costs ifwhile weforeign ~~earn~~research ~~net~~and ~~taxable~~development ~~income,~~costs ~~our~~remain ~~ability~~subject to ~~use our pre~~long-~~change~~term ~~net operating loss carryforwards and tax credit carryforwards to reduce U~~amortization.S. ~~federal~~As ~~and~~of ~~state~~December ~~income~~31, ~~tax may be subject to limitations~~2025, ~~which~~we ~~could~~had ~~potentially~~Section ~~result~~174 incapitalized ~~increased~~research ~~future~~and ~~cash~~development ~~tax~~of ~~liability~~approximately to$594.7 usmillion.

Any limitation may result in the expiration of a portion of the net operating loss or tax credit carryforwards before utilization, which would reduce our gross deferred income tax assets, or may result in limitations in the amount of deductions that could be applied to taxable income, which would increase our current tax provision. As a result, if we earn net taxable income, our ability to use our pre-change net operating loss carryforwards and tax credit carryforwards to reduce U.S. federal and state income tax may be subject to limitation, which could potentially result in increased future cash tax liability to us.

In the past, we have identified material weaknesses in our internal controls which might cause stockholders to lose confidence in our financial and other public reporting, particularly if not remediated appropriately and timely, which in turn would harm our business and the trading price of our common stock.

Maintaining effective internal control over financial reporting is necessary for us to produce reliable financial statements. Effective internal control over financial reporting and adequate disclosure controls and procedures are designed to prevent fraud.

Our failure to implement required new or improved controls, or difficulties encountered in their implementation, could cause us to fail to meet our reporting obligations. Moreover, we are required to maintain effective disclosure controls and procedures in order to provide reasonable assurance that the information required to be reported in our periodic reports filed with the SEC is recorded, processed, summarized, and reported within the time periods specified by the SEC's rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosures.

In ~~the~~2022 ~~past~~ we identified material weaknesses in our internal control over financial reporting. We successfully implemented measures designed to ensure that the control deficiencies contributing to the material weaknesses were remediated. However, if we are unable to maintain effective internal control over financial reporting in the future, our ability to report financial ~~information timely and accurately could be adversely affected. As a result, we could lose investor confidence and~~

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information timely and accurately could be adversely affected. As a result, we could lose investor confidence and become subject to litigation or investigations, which could adversely affect our business, operations, financial condition and the trading price of our Common Stock.

In addition, any testing conducted by us in connection with Section 404(a) of the Sarbanes-Oxley Act of 2002 (SOX), or the subsequent testing by our independent registered public accounting firm in connection with Section 404(b) of SOX, may in the future reveal deficiencies in our internal control over financial reporting that are deemed to be material weaknesses. Any system of internal controls, however well designed and operated, is based in part on certain assumptions and can provide only reasonable, not absolute, assurances that the objectives of the system are met. Failure to maintain effective internal control over financial reporting or disclosure controls and procedures or to remediate any material weakness, could result in a material misstatement of our consolidated financial statements that would require a restatement or other materially deficient disclosures. Therefore, investor confidence in the accuracy and timeliness of our financial reports and other disclosures may be adversely impacted, and the market price of our common shares could be negatively impacted.

We are required to disclose changes made in our internal control procedures on a quarterly basis. Our management is required to assess the effectiveness of these controls annually. The annual independent assessment of the effectiveness of our internal controls is very expensive and could detect problems that our management's assessment might not. Undetected material weaknesses in our internal controls could lead to financial statement restatements and require us to incur the expense of remediation.

We devote significant resources and time in an effort to comply with the provisions related to internal control over financial reporting of the Sarbanes-Oxley Act of 2002. However, we cannot be certain that these measures will ensure that we design, implement, and maintain adequate control over our financial processes and reporting in the future.

The integration of acquired businesses may result in our systems and controls becoming increasingly complex and more difficult to manage, regardless of whether such acquired business was previously privately or publicly held. The integration of acquired businesses may also result in material challenges to the Company’s control environment, including: managing a larger, more complex combined business; maintaining employee morale and retaining key management and other employees; unanticipated issues in integrating financial reporting and information technology infrastructure; and harmonizing the companies’ operating practices, internal controls, compliance programs and other policies, procedures, and processes. We may also encounter difficulties in addressing possible differences in business backgrounds, corporate cultures and management philosophies, and maintaining adequate staffing, which could potentially pose challenges in the implementation and operation of controls. We may also identify or fail to identify potential deficiencies in internal controls at the acquired or combined business level.

Any difficulties in the assimilation of acquired businesses into our internal control framework could harm our operating results or cause us to fail to meet our financial reporting obligations. These risks, among others, could be heightened if we complete a large acquisition or other business venture or multiple transactions within a relatively short period of time.

We have expended and anticipate that we will continue to expend significant resources in order to improve the effectiveness of our disclosure controls and procedures and internal control over financial reporting.

We have and may further expand our business through acquisitions of new product lines or businesses, which expose us to various risks, including difficulties in integrating acquisitions. Our recent acquisitions pose certain incremental risks to the Company.

Our acquisition strategy entails numerous risks. Our continued ability to grow through acquisitions, such as our acquisition of Sage Therapeutics, Inc. will depend, in part, on the availability of suitable candidates at acceptable prices, terms, and conditions; our ability to compete effectively for acquisition candidates; and the availability of capital and personnel resources to complete such acquisitions and run and integrate the acquired business effectively. We anticipate competition for attractive candidates from other parties, some of whom have substantially greater financial and other resources than we have. Any acquisition, alliance, joint venture, investment, or partnership could impair our business, financial condition, reputation, and operating results. For instance, the benefits of an acquisition, or new alliance, joint venture, investment, or partnership may take more time than expected to develop or integrate into our operations, and we cannot guarantee that previous or future acquisitions, alliances, joint ventures, investments, or partnerships will, in fact, produce any benefits. Whether or not any particular acquisition is successfully completed, each of these activities is expensive and time consuming and would likely require our management to spend considerable time and effort to complete, which would detract from our management's ability to run our current business. Although we may spend considerable funds and efforts to pursue acquisitions, we may not be able to complete them.

Acquisitions may involve a number of risks, the occurrence of which could adversely affect our business, reputation, financial condition, and operating results, including:

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•Dilutive issuances of equity securities;

•Incurrence of additional debt and contingent liabilities;

•Increased amortization of expenses related to intangible assets;

•Difficulties in the integration of the operations, technologies, services, and products of the acquired companies;

•Diversion of management's attention from our other business activities;

•Assumption of debt and liabilities of the target company including any ongoing lawsuits;

•Failing to achieve anticipated revenues, profits, benefits, or cost savings;

•Difficulty in coordinating, establishing, or expanding sales, distribution and marketing functions, as necessary;

•Potential inability to realize the value of the acquired assets relative to the price paid;

•Inaccurate assessment of additional post-acquisition, undisclosed, contingent, or other liabilities or problems, unanticipated costs associated with an acquisition despite the existence of representations, warranties, and indemnities in any definitive agreement; and an inability to recover or manage such liabilities and costs;

•Possibility of incurring significant restructuring charges and amortization expense;

•Potential impairment to assets recorded as a part of an acquisition, including intangible assets and goodwill;

•Potential loss of key employees, customers or distribution partners;

•Difficulties implementing and maintaining sufficient controls, policies, and procedures over the systems, products, and processes of the acquired company and the potential for deficiencies in internal controls at the acquired or combined business;

•Adverse tax consequences;

•Reallocation of amounts of capital from other operating initiatives and/or an increase in our leverage and debt service requirements to pay acquisition purchase prices or other business venture investment costs, which could, in turn, restrict our ability to access additional capital when needed, result in a decrease in our credit rating, or limit our ability to pursue other important elements of our business strategy;

•Failure by acquired businesses or other business ventures to comply with applicable international, federal, and state product safety or other regulatory standards; and

•Impacts as a result of purchase accounting adjustments, incorrect estimates made in the accounting for acquisitions, the incurrence of non-recurring charges, or other potential financial accounting or reporting impacts.

~~The~~Assets ~~Company~~ acquired ~~Adamas~~from ~~through~~acquisitions, awhich ~~tender~~include ~~offer~~intangible ~~for~~assets, ~~$8.10~~were ~~per~~recorded ~~share~~at intheir ~~cash~~estimated ~~(or~~fair anvalue ~~aggregate~~at ofthe ~~approximately~~applicable ~~$400 million),~~date ~~payable~~of atacquisition. ~~closing~~The ~~plus~~fair ~~two~~value ~~non-tradable~~of ~~contingent~~intangible ~~value~~assets, ~~rights~~including ~~(CVR)~~acquired ~~collectively~~in-process ~~worth~~research upand todevelopment ~~$1.00~~(IPR&D), ~~per~~were ~~share~~determined inusing ~~cash~~information ~~(or~~available anas ~~aggregate~~ of ~~approximately~~the ~~$50 million),~~applicable ~~for~~acquisition adate ~~total~~and ~~consideration~~were ofbased ~~$9.10~~on ~~per~~estimates ~~share~~and inassumptions ~~cash~~that ~~(or~~were andeemed ~~aggregate~~reasonable ofby ~~approximately $450 million)~~management. The ~~first~~fair ~~CVR,~~value ~~represents~~of athese ~~contractual~~contingent ~~right~~consideration toliabilities ~~receive~~and athe ~~contingent~~CVR ~~payment~~is ofdetermined ~~$0.50~~as ~~per~~of ~~share~~the inapplicable ~~cash,~~acquisition isdate ~~payable~~using ~~upon~~estimated ~~achieving~~or ~~net~~forecast ~~sales~~inputs. ofChanges ~~GOCOVRI of $150 million~~ in any ~~four~~of ~~consecutive~~the ~~quarters~~inputs ~~between~~or ~~closing~~assumptions ~~and~~to the ~~end~~fair ofvalue ~~2024.~~estimate ~~The~~may ~~second~~result ~~CVR~~in ~~represents~~ a ~~contractual~~significantly ~~right~~different tofair ~~receive~~value ~~a contingent payment of $0.50 per share in cash~~adjustment, iswhich ~~payable~~may ~~upon~~impact ~~achieving~~the ~~net~~results ~~sales~~ of ~~GOCOVRI~~operations ~~of $225 million~~ in ~~any~~the ~~four~~period ~~consecutive~~in ~~quarters~~which ~~between closing and~~ the ~~end~~adjustment ofis ~~2025~~made.

As part of the USWM Acquisition, the Company acquired the right to further develop and commercialize APOKYN, XADAGO, and the Apomorphine Infusion Device (SPN-830) in the U.S. and MYOBLOC worldwide (the Products) for an upfront cash payment of $300 million and the potential for additional contingent consideration payments of up to $230 million. The potential $230 million in contingent consideration payments includes up to $130 million for the achievement of certain SPN-830 regulatory and commercial activities and up to $100 million related to future sales performance of the acquired products. The regulatory and commercial milestone activities include milestones related to FDA acceptance and approval of NDA and milestones dependent on the timing of NDA approval and commercial launch of SPN-830. Sales-based milestones are dependent on achievement of future product sales targets. As ONAPGO (apomorphine hydrochloride) injection, formerly known as

Table of ContentsITEM 1A. RISK FACTORS.

SPN-830, received FDA approval in February 2025, certain milestones related to the FDA approval of the SPN-830 NDA were paid in February 2025, and we expect certain of the remaining regulatory and commercial milestone activities to become due and paid in 2025.

In addition, the assets acquired from the acquisitions, which included intangible assets, were recorded at their estimated fair value at the applicable date of acquisition. The fair value of intangible assets, including acquired in-process research and development (IPR&D), were determined using information available as of the applicable acquisition date and were based on estimates and assumptions that were deemed reasonable by management. The fair value of these contingent consideration liabilities and the CVR is determined as of the applicable acquisition date using estimated or forecast inputs. Changes in any of the inputs or assumptions to the fair value estimate may result in a significantly different fair value adjustment, which may impact the results of operations in the period in which the adjustment is made.

We cannot assure you that we will be able to complete acquisitions that we believe are necessary to complement our growth strategy on acceptable terms or at all. Further, if we do successfully integrate the operations of any companies that we have acquired or subsequently acquire, we may not achieve the potential benefits of such acquisitions. If we do not achieve the anticipated benefits of acquisition as rapidly or to the extent anticipated by management, or if others do not perceive the same benefits of the acquisition as we do, there could be a material, adverse effect on our business, cash flows, financial condition or results of operations. Further, we expect to incur substantial expenses in connection with the integration activities, and actual integration may result in additional and unforeseen expenses.

~~Any impairment in the value of our intangible assets, including goodwill, would negatively affect our operating results and total capitalization.~~65

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ITEM 1A. RISK FACTORS.

Any impairment in the value of our intangible assets, including goodwill, could negatively affect our operating results and total capitalization.

As part of prior acquisitions, we acquired substantial intangible assets, including goodwill. We may not realize all the economic benefits from acquisitions, which could cause an impairment of goodwill or other intangibles. We review our intangible assets for impairment when events or changes in circumstances indicate the carrying value may not be recoverable. For example, during the year ended December 31, 2023, the Company recognized impairment charges of $20.2 million mainly due to the partial write-off of the carrying value of some of its acquired intangible assets, primarily XADAGO. Factors that may lead to an impairment determination include: (1) the performance of an acquired commercial products; (2) anticipated loss of exclusivity of an acquired commercial product; and (3) changes in the Company's future outlook of acquired products.

We test goodwill for impairment at least annually. Factors that may cause a change in circumstances, indicating that the carrying value of our goodwill or intangible assets may not be recoverable, include a decline in our stock price and market capitalization, reduced future cash flow estimates if significant and prolonged negative industry or economic trends exist, significant changes occur in the competitive landscape and slower growth rates in industry segments in which we participate. For example, in February 2022 the FDA approved the first generic of APOKYN (apomorphine hydrochloride injection) to treat hypomobility "OFF" episodes ~~("end-of-dose wearing off" and unpredictable "ON/OFF" episodes)~~ associated with advanced Parkinson’s Disease when it approved an application for drug cartridges for use with the APOKYN brand-name pen injector. At this time, we cannot forecast what impact, if any, the FDA's approval of this generic may have on sales of APOKYN, or the value of our intangible asset associated with APOKYN. In addition, as of December 31, 2024, the Company also had an indefinite-lived intangible asset associated with SPN-830. In February 2025, the FDA approved ONAPGO (apomorphine hydrochloride) injection, formerly known as SPN-830, as the first and only subcutaneous apomorphine infusion device for the treatment of motor fluctuations in adults with advanced PD. The drug regulatory approval process is inherently uncertain, lengthy, and difficult. The FDA has substantial discretion in the drug approval process, including the ability to delay, limit or deny approval of a product candidate for many reasons. Any adverse action by the FDA can potentially impact our estimated fair value of the IPR&D intangible asset. We may be required to record a significant charge in our consolidated financial statements during the period in which any impairment of our goodwill or other intangible assets is determined, negatively affecting our results of operations and equity book value, the effect of which could be material.

Changes in tax laws or regulations that are applied adversely to us or our customers may have a material adverse effect on our business, cash flow, financial condition or results of operations.

Changes in tax laws or regulations that are applied adversely to us or our customers may have a material adverse effect on our business, cash flow, financial condition or results of operations. New income, sales and use or other tax laws or regulations could be enacted or promulgated at any time, which could adversely affect our business operations and financial performance. Further, existing tax laws and regulations could be interpreted, modified or applied adversely to us. These events could require us to pay additional taxes on a prospective or retroactive basis, as well as penalties, interest and other costs for past amounts deemed to be due. New laws or regulations, or laws or regulations that are changed, modified or newly interpreted or applied, also could create new or increase our existing compliance, operating and other costs, as well as the costs of our products. Further, the ~~Tax~~Reconciliation Act of 2017 enacted many significant changes to the U.S. tax laws, some of which were further modified in recent years, among others, by the Coronavirus Aid, Relief, and Economic Security Act of 2020, the Inflation Reduction Act of 2022 and more significantly by the Reconciliation Act of 2025, all of which may be further modified in the future by the current or a future presidential administration. Among other changes, the Reconciliation Act of 2017 amended the Internal Revenue Code of 1986, as amended (Code), to require that certain research and experimental expenditures be capitalized and amortized over five years if incurred in the United States or fifteen years if incurred in foreign jurisdictions for tax years beginning after December 31, 2021. The Reconciliation Act of 2025, however, permanently repealed the capitalization and amortization requirement for domestic research and experimental expenditures paid or incurred in tax years beginning after December 31, 2024, provides an option for taxpayers to capitalize and amortize such expenditures over at least 60 months, and offers transition rules permitting the deduction of unamortized domestic research and experimental expenditures paid or incurred in tax years 2022 through 2024. No changes were made by the Reconciliation Act of 2025 with respect to the capitalization and amortization requirement for research and experimental expenditures incurred in foreign jurisdictions. If and to the extent the immediate expensing for domestic research and experimental expenditures is repealed or any of the capitalization and amortization requirements reenacted or otherwise modified, it may increase our cash taxes and effective tax rate. In addition, it is uncertain if and to what extent various states will conform to current federal law, or any newly enacted federal tax legislation. Changes in corporate tax rates, the realization of net operating losses, and other deferred tax assets relating to our operations, the taxation of foreign earnings, and the deductibility of expenses could have a material impact on the value of our deferred tax assets and could increase our future tax expense.

60Although we have historically been profitable from operations since the fourth quarter of 2014, there is no assurance that we will continue to generate net income in the future. We may not be able to maintain or increase profitability.

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~~which~~Table ~~were~~of ~~further~~Contents ~~modified~~ITEM ~~by the Coronavirus Aid, Relief, and Economic Security Act, and may be modified in the future by the current or a future presidential administration~~1A. ~~Among~~RISK other changes, the Tax Act amended the Code to require that certain research and experimental expenditures be capitalized and amortized over five years if incurred in the United States or fifteen years if incurred in foreign jurisdictions for tax years beginning after December 31, 2021FACTORS. Although the U.S. Congress has considered legislation that would defer, modify, or repeal the capitalization and amortization requirement, there is no assurance that such changes will be made. If the requirement is not deferred, repealed or otherwise modified, it may increase our cash taxes and effective tax rate. In addition, it is uncertain if and to what extent various states will conform to current federal law, or any newly enacted federal tax legislation. Changes in corporate tax rates, the realization of net operating losses, and other deferred tax assets relating to our operations, the taxation of foreign earnings, and the deductibility of expenses could have a material impact on the value of our deferred tax assets and could increase our future tax expense.

Although we have been profitable from operations since the fourth quarter of 2014, there is no assurance that we will continue to generate net income in the future. We may not be able to maintain or increase profitability.

In recent years, we have focused primarily on marketing our current products and developing our product candidates, with the goal of supporting regulatory approval for our product candidates. We have financed our operations through revenue generated from operations and various financing transactions.

Our ability to remain profitable depends upon our ability to generate the same or increasing levels of revenue from sales of our commercial products while simultaneously funding the requisite research expenditures to gain FDA approval for our product candidates. Future revenues will highly depend on our ability to maintain or grow demand for our products and defend against potential generic competition and successfully develop and commercialize our product candidates.

As of December 31, ~~2024~~2025, we had retained earnings of approximately $~~556~~517.49 million. However, prior to 2018, we reported accumulated deficit due to significant operating losses incurred since inception through 2014, substantially as a consequence of costs incurred in connection with our development programs, expenses associated with launching our products, and from selling, general and administrative costs associated with our operations. We expect our research and development costs to continue to be substantial and to increase as we advance our product candidates through preclinical studies, clinical trials, manufacturing scale-up, and other pre-approval activities. We expect our selling, general and administrative costs to continue to increase as we continue to support the ongoing commercialization of our products and to further increase in anticipation of launching new product candidates.

~~While~~We we operated ~~profitably~~at a net loss in ~~2024~~2025, however, we had positive adjusted operating earnings. We cannot be certain that we will continue to do so. Any potential future losses, if and when they occur, could have an adverse impact on our stockholders' equity and working capital.

Risks Related to Securities Markets and Investment in Our Stock

The issuance of additional shares of our common stock, or instruments convertible into or rights to acquire shares or our common stock, or market sales of our common stock, could affect the market price of our common stock.

We may conduct future offerings of our common stock, preferred stock, or other securities that are convertible into or exercisable for our common stock to finance our operations, fund acquisitions, or for other purposes. Sales of our common stock, or the perception in the market that the holders of a large number of shares intend to sell shares, could reduce the market price of our common stock, which would impair our ability to raise future capital through the sale of additional equity securities.

In addition, as of December 31, ~~2024~~2025, we had outstanding 5557,~~743~~457,~~095~~462 shares of common stock, of which approximately 2,~~242~~506,~~033~~151 shares are restricted securities that may be sold in accordance with the resale restrictions under Rule 144 of the Securities Act of 1933, as amended (Securities Act), or pursuant to a resale registration statement. Also, as of December 31, ~~2024~~2025, we had outstanding options to purchase 6,~~719~~343,~~073~~009 shares of common stock that, if exercised, would result in these additional shares becoming available for sale. We have also registered all common stock subject to options, restricted stock units and performance stock units outstanding or reserved for issuance under our ~~2005 Stock Plan,~~ 2012 Equity Incentive Plan, 2021 Equity Incentive Plan and 2012 Employee Stock Purchase Plan. An aggregate of 43,~~609~~008,~~727~~901 and ~~584~~484,~~192~~612 shares of our common stock are reserved for future grant issuance under the 2021 Equity Incentive Plan and the 2012 Employee Stock Purchase Plan, respectively.

If we issue additional shares of our common stock or issue rights to acquire shares of our common stock, if any of our existing stockholders sells a substantial amount of our common stock, or if the market perceives that such issuances or sales may occur, then the trading price of our common stock may significantly decrease. In addition, our issuance of additional shares of common stock will dilute the ownership interests of our existing common stockholders.

Table of ContentsITEM 1A. RISK FACTORS.

The price of our common stock may fluctuate substantially.

The market price for our common stock historically has been volatile. In addition, the market price of our common stock may fluctuate significantly in response to a number of factors, including but not limited to:

•Fluctuations in stock market prices for the U.S. stock market;

•The commercial performance of products, including Qelbree, GOCOVRI, Oxtellar XR, Trokendi XR, ~~and~~ APOKYN, ONAPGO, ZURZUVAE, or any of our product candidates that receive regulatory approval;

•Substitution of our products in favor of generic versions of our products or competitors' products;

•Status of patent infringement lawsuits, if applicable;

•The filing of ANDAs by generic companies seeking approval to market generic versions of our products;

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ITEM 1A. RISK FACTORS.

•Plans for, progress in, and results from clinical trials of our product candidates generally;

•FDA or international regulatory actions, including actions on regulatory applications for any of our product candidates;

•Announcements of new products, services or technologies, commercial relationships, acquisitions, or other events by us or our competitors;

•Market conditions and regulatory changes in the pharmaceutical and biotechnology sectors;

•Fluctuations in stock market prices and trading volumes of similar companies;

•Variations in our quarterly operating results;

•Changes in accounting principles;

•Litigation or public concern about the safety of our products and/or potential products;

•Fluctuations in our quarterly operating results;

•Deviations in our operating results from the estimates of securities analysts;

•Additions or departures of key personnel;

•Sales or purchases of large blocks of our common stock, including sales by our executive officers, directors, and significant stockholders;

•Changes in third-party coverage and reimbursement policies for our products and/or product candidates; and

•Discussion by us of our stock price in the financial or scientific press or investor communities.

The realization of any of the risks described in these "Risk Factors" could have a dramatic, material, and adverse impact on the market price of our common stock. In addition, class action litigation has often been instituted against companies whose securities have experienced periods of volatility. Any such litigation brought against us could result in substantial costs and a diversion of management attention, which could hurt our business, operating results, and financial condition.

Anti-takeover provisions under our charter documents and Delaware law could delay or prevent a change of control, which could negatively impact the market price of our common stock.

Provisions in our certificate of incorporation and bylaws, as amended, may have the effect of delaying or preventing a change of control. These provisions include the following:

•Our board of directors is divided into three classes, serving staggered three-year terms, such that not all members of the board will be elected at one time. This staggered board structure prevents stockholders from replacing the entire board at a single stockholders' meeting;

Table of ContentsITEM 1A. RISK FACTORS.

•Our board of directors has the right to elect directors to fill a vacancy created by the expansion of the board of directors or the resignation, death, or removal of a director, which prevents stockholders from being able to fill vacancies on our board of directors;

•Our board of directors may issue, without stockholder approval, shares of preferred stock. The ability to authorize preferred stock makes it possible for our board of directors to issue preferred stock with voting or other rights or preferences that could impede the success of any attempt to acquire us;

•Stockholders must provide advance notice to nominate individuals for election to the board of directors or to propose matters that can be acted upon at a stockholders' meeting. Furthermore, stockholders may only remove a member of our board of directors for cause. These provisions may discourage or deter a potential acquirer from conducting a solicitation of proxies to elect such acquirer's own slate of directors or otherwise attempting to obtain control of our Company;

•Our stockholders may not act by written consent. As a result, a holder, or holders, controlling a majority of our capital stock would not be able to take certain actions outside of a stockholders' meeting;

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ITEM 1A. RISK FACTORS.

•Special meetings of stockholders may be called only by the chairman of our board of directors or a majority of our board of directors. As a result, a holder, or holders, controlling a majority of our capital stock would not be able to call a special meeting; and

•A supermajority (75%) of the voting power of outstanding shares of our capital stock is required to amend, repeal or adopt any provision inconsistent with certain provisions of our certificate of incorporation and to amend our by-laws, which make it more difficult to change the provisions described above.

In addition, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which may prohibit certain business combinations with stockholders owning 15% or more of our outstanding voting stock. These and other provisions in our certificate of incorporation, our bylaws, and in the Delaware General Corporation Law could make it more difficult for stockholders or potential acquirers to obtain control of our board of directors or initiate actions that are opposed by the then-current board of directors.

To the extent outstanding stock options are exercised and restricted stock units and performance stock units vest there will be dilution to new investors.

As of December 31, ~~2024~~2025, we had issued options to purchase 6,~~719~~343,~~073~~009 shares of common stock outstanding, with exercise prices ranging from $912.1398 to $58.15 per share and a weighted average exercise price of $3032.4463 per share, as well as ~~378~~396,~~165~~693 unvested restricted stock units and ~~324~~390,~~685~~496 performance stock units. Upon the vesting of each of these options, the holder may exercise his or her options, and following the vesting of the restricted stock units and performance stock units the holder will receive shares of common stock, which would, in any case, result in dilution to investors.

Indebtedness and liabilities could limit the cash flow available for our operations, expose us to risks that could adversely affect our business, financial condition, and results of operations, and impair our ability to satisfy our obligations under the notes.

In 2018 we incurred $402.5 million of indebtedness as a result of the sale of 0.625% Convertible Senior Notes, which matured on April 1, 2023 (2023 Notes) at which time the Company paid the total principal amount and the outstanding interest due. During the first quarter of 2023, we entered into the Credit Line, an uncommitted demand secured credit line with a financial institution for up to $150.0 million. In the future, we may incur indebtedness, including by drawing funds from the Credit Line, to meet financing needs or otherwise refinance existing indebtedness. Indebtedness could have significant negative consequences for our security holders and our business, results of operations, and financial condition by, among other things:

•Increasing our vulnerability to adverse economic and industry conditions;

•Limiting our ability to obtain additional financing;

•Requiring the dedication of a substantial portion of our cash flow from operations to service our indebtedness, which would reduce the amount of cash available for other purposes;

•Limiting our flexibility to plan for, or react to, changes in our business; and

•Placing us at a possible competitive disadvantage with competitors that are less leveraged than us or have better access to capital.

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Our business may not generate sufficient funds, and we may otherwise be unable to maintain sufficient cash reserves to pay amounts due under any indebtedness we incur.

Our Credit Line is an uncommitted debt facility that may be terminated by the lender at any time.

Our Credit Line is an uncommitted debt facility and, accordingly, the lender may not provide funding to us when we request a borrowing thereunder. Additionally, the terms of the Credit Line permit the lender to terminate the Credit Line and demand full or partial payment of amounts borrowed thereunder at any time. Although we believe that our existing financing sources, including the Credit Line, are adequate for our current operations, reductions in our available credit, or the inability to draw on the Credit Line, could have an adverse effect on our business, financial condition and results of operations.

General Risk Factors

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ITEM 1A. RISK FACTORS.

Obtaining and maintaining patent protection depends on compliance with various procedural, document submission, fee payment, and other requirements imposed by governmental patent agencies. Our patent protection could be reduced or eliminated for non-compliance with these requirements.

The USPTO and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee payment, and other provisions during the patent process. There are situations in which noncompliance can result in abandonment or in lapse of a patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. In such an event, competitors might be able to enter the market earlier than would otherwise have been the case, causing damage to our business.

Our insurance coverage may not be sufficient to cover our legal claims or other losses that we may incur in the future.

We seek to minimize any losses we may incur through various insurance contracts from third-party insurance carriers. However, our insurance coverage is subject to large individual claim deductibles, individual claim and aggregate policy limits, and other terms and conditions. We cannot assure that our insurance will be sufficient to cover our losses. Further, due to rising insurance costs and changes in the insurance markets, we cannot provide assurance that insurance coverage will continue to be available on terms similar to those presently available to us or available at all. Any such losses not covered by insurance could have a material adverse effect on our financial condition, results of operations, and cash flows.

We may be subject to claims that our employees have wrongfully used or disclosed alleged trade secrets of their former employers.

We employ individuals who were previously employed at other pharmaceutical companies, including our competitors or potential competitors. As such, we may be subject to claims that we or these employees have used or disclosed trade secrets or disclosed other proprietary information of their former employers. Litigation may be necessary to defend against these claims. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a distraction to management.

We may enter into significant, complex, and unusual transactions, which may require us to engage outside consultants and financial professionals in order to comply with complex accounting and reporting requirements.

From time to time, the Company may be presented with and may choose to enter into significant, complex, and unusual business or financial transactions, either to raise capital or in the context of entering into a business arrangement with a third party. These transactions may entail complex accounting or financial reporting requirements, with which we may not be familiar. Accordingly, we may need to hire additional personnel or retain the services of outside accounting, financial reporting, and legal experts to guide both the transaction and to assist management in becoming compliant with the attendant financial reporting requirements. Acquiring such additional resources could increase our legal and financial compliance costs, divert management's attention from other matters, and/or make certain activities more time consuming.

Given the complexity of such transactions, there is an inherent risk regarding compliance with financial reporting requirements. Because the relevant regulations and standards are subject to varying interpretation, in many cases due to their lack of specificity, their application in practice may evolve over time, as new guidance is provided by regulatory and governing bodies, and as the market gains familiarity with these requirements. This could result in continuing uncertainty regarding compliance matters and on-going financial reporting requirements.

Table of ContentsITEM 1A. RISK FACTORS.

If our efforts to comply with new laws, regulations, and accounting standards differ from the intentions of regulatory or governing bodies due to ambiguities related to their application and practice, regulatory authorities may initiate legal proceedings against us, and our business may be adversely affected.

Our operations rely on sophisticated information technology, systems, and infrastructure, a disruption of which could harm our operations.

We may not be able to make improvements to our management information and control systems in an efficient or timely manner and may discover deficiencies in existing systems and controls. In addition, we rely on various information technology, and systems, some of which are provided by, or dependent on services provided by, third parties, to manage our technology platform and operations. These systems provide critical data and services for internal and external users, including procurement, inventory management, transaction processing, financial, commercial, and operational data, human resources management, legal and tax compliance, financial reporting, and other information necessary to operate and manage our business. These systems are complex and are frequently updated as technology improves. This includes software and hardware that is licensed, leased, or purchased from third parties. If our information technology, equipment, or systems fail to function properly due to internal errors or defects, implementation or integration issues, catastrophic events, cyberattacks, or power outages, we may experience a material disruption in our ability to manage our business operations. Failure or disruption of these systems could have an adverse effect on our operating results and financial condition. In addition, we may not be able to make improvements to our management information and control systems in an efficient or timely manner and may discover deficiencies in existing systems and controls. Any failure to manage, expand, or update our information technology infrastructure, or any failure in the operation of this infrastructure, could harm our business.

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purchased from third parties. If our information technology, equipment, or systems fail to function properly due to internal errors or defects, implementation or integration issues, catastrophic events, cyberattacks, telecommunications delays or failures or power outages, we may experience a material disruption in our ability to manage our business operations. Failure or disruption of these systems could have an adverse effect on our operating results and financial condition. Any failure to manage, expand, or update our information technology infrastructure, or any failure in the operation of this infrastructure, could harm our business.

We may need additional funding and may be unable to raise capital when needed, which would force us to delay, reduce or eliminate our product development programs, commercialization, or business development efforts.

Developing or acquiring products and product candidates, conducting clinical trials, establishing manufacturing relationships and marketing drugs are expensive and uncertain processes.

In addition, unforeseen circumstances may arise, or our strategic imperatives could change, causing us to consume capital significantly faster than we currently anticipate, requiring us to raise additional funds. We have no committed external sources of funds.

The amount and timing of our future funding requirements will depend on many factors, including, but not limited to:

•Our ability to successfully support our products in the marketplace and the rate of increase in the level of sales in the marketplace;

•The rate of progress, clinical success, and cost of our trials and other product development programs for our product candidates;

•The costs and timing of in-licensing product candidates or acquiring other complementary companies;

•The timing of any regulatory approvals of our product candidates;

•The actions of our competitors and their success in selling competitive product offerings, including generics; and

•The status, terms, and timing of any collaborative, licensing, co-promotion, or other arrangement.

Additional financing may not be available in the amount we require or may not be available on terms that are favorable to us or at all. We may seek additional capital due to favorable market conditions or strategic considerations, even if we believe we have sufficient funds for our current or future operating plans. If adequate funds are not available to us on a timely basis, or at all, we may be required to delay, reduce the scope of, or eliminate one or more of our development programs, our commercialization efforts, or strategic initiatives.

Complying with increased financial reporting and securities laws reporting requirements has increased our costs and requires additional management resources. We may fail to meet these obligations.

We face increased legal, accounting, administrative, and other costs and expenses as a public company. Compliance with Section 404 of SOX, the Dodd-Frank Act of 2010, as well as rules of the Securities and Exchange Commission and NASDAQ, for example, has resulted in significant initial costs to us as well as ongoing legal, audit and financial reporting costs. As of the beginning of 2017, we transitioned from "accelerated filer" to "large accelerated filer" status, which led to further increases in our legal, audit, NASDAQ listing fees, and financial compliance costs. The Securities Exchange Act of 1934, as amended (the Exchange Act), requires, among other things, that we file annual, quarterly, and current reports with respect to our business and financial condition. Our board of directors, management, and outside advisors need to devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations make it more difficult and more expensive for us to obtain director and officer liability insurance and require us to incur substantial and increasing costs to maintain the same or similar coverage.

Table of ContentsITEM 1A. RISK FACTORS.

legal, audit, NASDAQ listing fees, and financial compliance costs. The Securities Exchange Act of 1934, as amended (the Exchange Act), requires, among other things, that we file annual, quarterly, and current reports with respect to our business and financial condition. Our board of directors, management, and outside advisors need to devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations make it more difficult and more expensive for us to obtain director and officer liability insurance and require us to incur substantial and increasing costs to maintain the same or similar coverage.

As a public company, we are subject to Section 404 of SOX relating to internal control over financial reporting. We have and expect to continue to incur significant expense and to devote substantial management effort toward ensuring compliance with Section 404.

Implementing any necessary changes to our internal controls may require specific compliance training for our directors, officers, and employees, entail substantial costs to modify or replace our existing accounting systems, and take a significant period of time to complete. Such changes may not, however, be effective in maintaining the adequacy of our internal controls. Any failure to maintain that adequacy, or consequent inability to produce accurate consolidated financial statements or other reports on a timely basis, could increase our operating costs and could materially impair our ability to operate our business. We cannot give assurance that our internal control over financial reporting will prove to be effective.

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ITEM 1A. RISK FACTORS.

We have never paid dividends. Because we do not anticipate paying any cash dividends in the foreseeable future, capital appreciation, if any, of our common stock will be your sole source of gain on an investment in our common stock.

We have paid no cash dividends, and we currently intend to retain our future earnings, if any, to fund the development and growth of our business. We do not anticipate paying cash dividends on our common stock in the foreseeable future. As a result, capital appreciation, if any, of our common stock will be your sole source of gain for the foreseeable future. There is no guarantee that shares of our common stock will appreciate in value or even maintain the price at which our stockholders have purchased their shares.

Unstable market and economic conditions may have serious adverse consequences on our business, financial condition and stock price.

As a result of economic conditions and other geopolitical events, in recent years the global credit and financial markets have experienced extreme volatility and disruptions, which has included periods of severely diminished liquidity and credit availability, declines in consumer confidence, declines in economic growth, and increases in inflation and uncertainty about economic stability. The financial markets, and global economy ~~and supply chains~~ have and may continue to be adversely affected by pandemics, economic conditions and ~~current or anticipated~~ geopolitical events, including the impact of military conflicts, sanctions imposed in response to such conflicts, and any economic countermeasures by the affected countries or others could exacerbate market and economic instability. There can be no assurance that further deterioration in ~~supply chains,~~ credit and financial markets and confidence in economic conditions will not occur. Our general business strategy may be adversely affected by any such economic downturn, volatile business environment, inflationary economic environment or continued unpredictable and unstable market conditions, including disruption to enrollment within our ongoing clinical trials and our ability to purchase necessary supplies on acceptable terms, if at all, and increased costs in compensation levels to recruit and retain qualified personnel and to carry out ongoing and future clinical trials. If the current equity and credit markets deteriorate, it may make any necessary debt or equity financing more difficult, more costly and more dilutive. Failure to secure any necessary financing in a timely manner and on favorable terms could have a material adverse effect on our growth strategy, financial performance and stock price and could require us to delay or abandon clinical development plans. In addition, there is a risk that one or more of our current service providers, suppliers or other partners may not survive an economic downturn or rising inflation, which could directly affect our ability to attain our operating goals on schedule and on budget.

ITEM 1B. UNRESOLVED STAFF COMMENTS.

None.

ITEM 1C. CYBERSECURITY.

Cybersecurity

Our business depends on information technology systems and networks, which we protect from cyber threats that could harm our data, operations, and reputation. We have invested in security measures designed to safeguard the data of our customers and employees, prevent, detect, and respond to cyberattacks, and comply with data privacy requirements.

Cybersecurity Governance

Table of ContentsITEM 1A. RISK FACTORS.

Our approach to cybersecurity begins with our responsibility for strong governance and controls. Security begins at the top of our organization, where Company leadership consistently communicates the requirements for vigilance and compliance throughout the organization, and then leads by example. We use a risk-based and layered approach to prevent, detect, and respond to cyberattacks, and leverage external partnerships for threat intelligence.

Our management is responsible for risk identification, risk management and risk mitigation strategies associated to cybersecurity related information technology risks, including fully documenting our cybersecurity policies and procedures and cybersecurity risk management program as well as implementing a cybersecurity risk management program and ensuring compliance with our cybersecurity policies and procedures. Our ~~Senior~~Chief ~~Vice~~Technical ~~President of Quality, GMP~~ Operations, ~~and~~Officer ~~Information Technology~~ leads our Information Technology team, which includes experienced and information security professionals and has expertise in various aspects of cybersecurity, such as network security, data protection, incident response, threat intelligence, and security awareness. Our Information Technology Team’s expertise is supplemented by external consultants who provide specialized services and independent assessments of our cybersecurity posture and capabilities.

Management has appointed a Cybersecurity Incident Response Team (~~the “~~CSIRT”) which is operationally responsible for coordinating, executing, and managing cybersecurity incident response activities. The CSIRT is comprised of experienced information security personnel from our Information Technology team. The CSIRT’s responsibilities include, among other things, incident identification and escalation to designated members of management. Among the designated members of management who are required to be notified are our Chief Executive Officer and our Chief Financial Officer.

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ITEM 1A. RISK FACTORS.

information security personnel from our Information Technology team. The CSIRT’s responsibilities include, among other things, incident identification and escalation to designated members of management. Among the designated members of management who are required to be notified are our Chief Executive Officer and our Chief Financial Officer.

Our Board of Directors has appointed its Audit Committee as its primary body to oversee management’s risk identification, risk management and risk mitigation strategies related to cybersecurity related information technology risks. Members of our management who have responsibility for designing and implementing our risk management processes are required to meet periodically with the Audit Committee regarding our policies, processes, procedures and any significant development related to the identification, management and mitigation of cybersecurity risks. The Audit Committee’s primary oversight of management’s cybersecurity risk management efforts is supplemented by our full Board, which is required to receive, on an annual basis an update from management on any significant developments related to the identification, management and mitigation of cybersecurity risks.

Cybersecurity Risk Identification and Management

As part of management’s initiative to enhance our information security program, during ~~2024~~2025 our program underwent an internal audit, which was supported by an international firm experienced in auditing such programs. The results of the audit are being used by management to supplement previously planned enhancements. Management, with the assistance of third-party experts, is developing and implementing governance-related enhancements to its cybersecurity risk management program. A significant aspect of that process involves fully documenting policies, standards and procedures and developing others, including personnel training requirements, threat monitoring, detection, and containment standards, risk assessment processes, standards for third-party penetration testing, and standards for third-party vendor security requirements. Management expects that the program will continue to adapt and incorporate new techniques and procedures in an effort to combat evolving and novel cybersecurity threats.

Our current cybersecurity risk management program includes the following key elements:

•Cybersecurity risk mitigation: We utilize various measures, tools and controls to prevent, detect, and mitigate cyberattacks, such as firewalls, antivirus software, encryption, authentication, backup, and recovery. We also adopt a defense-in-depth approach that layers multiple security mechanisms across our information systems and networks, such as perimeter, endpoint, application, and data security. We monitor and test our security measures and controls, and we update and enhance them as needed to address new and emerging cyber threats and vulnerabilities.

We also rely on specialized services or tools from third-party vendors and software companies including network monitoring, threat, incident and breach identification and data security and backup services. For third-party service providers whose software or personnel have access to our systems, we review their security audit reports prior to the commencement of their services.

•Cybersecurity risk response: The Company’s Executive Management, which is led by our CEO and includes leaders from across the Company’s departments, is responsible for providing the necessary resources, support, and authority for the CSIRT to carry out their responsibilities effectively. Our Executive Management team is accountable for making critical decisions in response to an incident. The CSIRT is operationally responsible for coordinating, executing, and managing incident response activities. Both our Executive Management team and CSIRT receive regular training on information security topics.

Table of ContentsITEM 1A. RISK FACTORS.

•Cybersecurity education and training: We provide regular and mandatory cybersecurity education and training to our employees, contractors, and other authorized users of our information systems and networks, to raise their awareness and understanding of cyber risks and their responsibilities for protecting our information systems and data. We also conduct periodic phishing and social engineering campaigns to test and reinforce the cybersecurity behavior and culture of our users. We also ensure our suppliers and other business partners, meet our cybersecurity expectations and requirements.

We are committed to maintaining and improving our cybersecurity risk management program as our business and the cybersecurity threat environment evolves.

Because no cybersecurity program can ensure an incident will not occur, we have established business continuity, contingency and recovery plans to be used if we experience a cybersecurity incident, and obtained cyber insurance coverage to mitigate the potential losses and liabilities arising from cyber incidents.

Cybersecurity Incidents

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ITEM 1A. RISK FACTORS.

On November 24, 2021, we announced that we were the target of a ransomware attack. The attack had no significant impact on our business and did not cause any long-term disruption to our operations. After verifying redundant off-site data backups had not been compromised by the ransomware attack, the backups were utilized to restore the data encrypted by the criminal groups. While the Company has not been the subject of any legal proceedings involving the attack, the likelihood that the Company could be the subject of claims from persons alleging they suffered damages from the incident or actions by governmental authorities is possible, but the amount of such fines, penalties or costs, if any, cannot be estimated at this time. In response to the 2021 ransomware attack, we accelerated previously planned information technology investments in ways designed to improve our information security and technology infrastructure. We have incurred costs since 2021 and expect to continue to incur costs as we continue to invest in our information security and technology infrastructure.

Despite our security measures, our information technology and infrastructure may be vulnerable to cybersecurity incidents in the future, and our insurance may be inadequate to mitigate the potential losses and liabilities arising from such an incident. For additional information regarding cybersecurity risks we face, see Item 1A. Risk Factors - Cybersecurity incidents may adversely impact our financial condition, results of operations, and reputation. Security breaches and other disruptions could compromise our information and expose us to liability which would cause our business and reputation to suffer.

ITEM 2. PROPERTIES.

Our principal executive offices are located at 9715 and 9717 Key West Avenue, Rockville, Maryland, where we occupy approximately 136,016 square feet of laboratory and office space. The term of this lease commenced on February 1, 2019, and shall continue until April 30, 2034. We believe that these facilities are sufficient for our present and contemplated operations.

ITEM 3. LEGAL PROCEEDINGS.

From time to time and in the ordinary course of business, Supernus Pharmaceuticals, Inc. ("Company") and any of its subsidiaries may be subject to various claims, charges and litigation. Parent and any of its subsidiaries may be required to file infringement claims against third parties for the infringement of our patents.

~~Oxtellar~~I. ~~XR®~~Supernus Pharmaceuticals, Inc. v. Ajanta Pharma Limited, et al., C.A. No. 21-cv-6964 (GC)(DEA) (D.N.J.)

IThe Company received a Paragraph IV Notice Letter from generic drug maker Ajanta Pharma Limited dated February 10, 2021, directed to ten of its Trokendi XR® Orange Book patents. Supernus’s ~~Pharmaceuticals~~U.S. Patent Nos. 8,298,576; ~~Inc~~8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 generally cover once-a-day topiramate formulations and methods of treating or preventing seizures and migraines using those formulations. The vFDA Orange Book currently lists United States Patent No. 8,298,576 as expiring on April 4, 2028, and United States Patent Nos. 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 as expiring on November 16, 2027. On March 26, 2021, the Company filed a lawsuit against Ajanta Pharma Limited, Cand Ajanta Pharma USA Inc.A (collectively Ajanta) alleging infringement of the Company’s Trokendi XR® Orange Book patents. The NoComplaint—filed in the U.S. ~~22-cv-1431~~District Court for the District of New Jersey—alleges, inter alia, that Ajanta infringed the Company’s Trokendi XR® patents by submitting to the FDA an Abbreviated New Drug Application (~~GBW~~ANDA) (Dseeking to market a generic version of Trokendi XR® prior to the expiration of the Company’s patents. Filing ~~Del~~its March 26, 2021, Complaint within 45 days of receiving Ajanta’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Ajanta’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter.) On June 7, 2021, Ajanta answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Ajanta also asserted Counterclaims seeking declaratory judgments of non‑infringement and invalidity for the Trokendi XR® Orange Book patents. On June 28, 2021, the Company filed its reply, denying the substantive allegations of Ajanta’s Counterclaims. Following the initial Rule 16 Scheduling Conference, the Court issued a case schedule. On December 17, 2021, the Court issued an order consolidating this lawsuit with the lawsuit against Torrent, discussed in Section II, below. The consolidation order extended the 30‑month stay preventing the FDA from approving Ajanta’s ANDA to December 16, 2023. The Company entered into a settlement agreement with Ajanta, and on April 4, 2023, a stipulation of dismissal without prejudice was entered by the U.S. District Court for the District of New Jersey. The agreement has been submitted to the applicable governmental agencies.

~~The~~II. ~~Company~~Supernus ~~received~~Pharmaceuticals, aInc. ~~Paragraph~~v. IVTorrent ~~Notice~~Pharmaceuticals ~~Letter from generic drug maker Ajanta Pharma Limited (“Ajanta”) dated September 19~~Ltd., ~~2022,~~et ~~directed to ten of its Oxtellar XR® Orange Book patents~~al. ~~Supernus’s~~, UC.SA. ~~Patent Nos~~No. ~~7,722,898; 7,910,131; 8,617,600; 8,821,930; 9,119,791; 9,351,975; 9,370,525; 9,855,278; 10,220,042; and 11,166,960 generally cover once~~21-acv-~~day~~14268 ~~oxcarbazepine~~(GC)(DEA) ~~formulations and methods of treating seizures using those formulations~~(D. ~~The FDA Orange Book lists all ten of the Company’s Oxtellar XR® patents as expiring on April 13, 2027~~N. OnJ.); ~~October~~Supernus 28Pharmaceuticals, ~~2022, the Company filed a lawsuit against Ajanta alleging infringement of the Company’s ten Oxtellar XR® patents~~Inc. ~~The~~ ~~Complaint—filed in the U~~v.S. ~~District Court for the District of Delaware—alleges, among other things, that~~ Ajanta ~~infringed~~Pharma the Company’s Oxtellar XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of Oxtellar XR® prior to the expiration of the Company’s patents. Filing its October 28Limited, ~~2022~~et Complaint within 45 days of receiving Ajanta’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Ajanta’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letteral. ~~On January 3~~, ~~2023,~~Appeal ~~Ajanta answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity~~No. ~~Ajanta also asserted Counterclaims seeking declaratory judgments of non~~2024-~~infringement~~1606 ~~and invalidity~~(Fed. ~~On January~~ Cir.)

68The Company received a Paragraph IV Notice Letter from generic drug maker Torrent Pharmaceuticals Ltd. dated June 15, 2021, directed to ten of its Trokendi XR® Orange Book patents. Supernus’s U.S. Patent Nos. 8,298,576; 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 generally cover once-a-day topiramate formulations and methods of treating or preventing seizures and migraines using those formulations. The FDA Orange

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24Book currently lists United States Patent No. 8,298,576 ~~2023~~as expiring on April 4, 2028, and United States Patent Nos. 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 as expiring on November 16, 2027. On July 28, 2021, the Company filed a lawsuit against Torrent Pharmaceuticals Ltd. and Torrent Pharma Inc. (collectively, Torrent) alleging infringement of the Company’s Trokendi XR® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges,inter alia, that Torrent infringed the Company’s Trokendi XR® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Trokendi XR® prior to the expiration of the Company’s patents. Filing its ~~Reply~~July 28, 2021 Complaint within 45 days of receiving Torrent’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Torrent’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter. On September 29, 2021, Torrent answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Torrent also asserted Counterclaims seeking declaratory judgments of non‑infringement for the Trokendi XR® Orange Book patents. On November 3, 2021, the Company filed its reply, denying the substantive allegations of ~~Ajanta~~Torrent’s Counterclaims. Following ~~The~~the initial Rule 16 Scheduling Conference, the District Court issued a ~~Scheduling~~case ~~Order~~schedule. On onDecember ~~July 13~~17, ~~2023~~2021, ~~that~~the ~~set~~District aCourt ~~trial~~issued ~~date~~an oforder ~~February~~consolidating 10this lawsuit with the lawsuit against Ajanta, ~~2025.~~discussed in Section I, above. The ~~Company~~District ~~entered~~Court ~~into~~held a ~~settlement~~bench ~~agreement~~trial ~~with~~between ~~Ajanta~~July 31, 2023, and August 3, 2023. Closing arguments for the trial were held on October 4, 2023. On December 12, 2023, the District Court issued an Order enjoining Torrent from launching its generic drug product through January 1831, 2024, aor ~~stipulation~~until ofthe ~~dismissal~~District ~~without~~Court’s ~~prejudice~~trial ~~was~~decision ~~entered~~issues, bywhichever ~~the~~is Usooner.S. On January 30, 2024, the District Court ~~for~~issued a Trial Opinion and Order, deciding in Supernus’s favor that the ~~District~~patent ofclaims ~~Delaware~~that Supernus asserted at trial against Torrent are both valid and infringed. The ~~agreement~~District ~~has~~Court ~~been~~entered ~~submitted~~a toFinal ~~the~~Judgment ~~applicable~~in ~~governmental~~Supernus’s ~~agencies~~favor on February 22, 2024.

IIOn March 5, 2024, Torrent filed a Notice of Appeal of the Final Judgment with the U.S. Court of Appeals for the Federal Circuit. The Federal Circuit docketed the appeal as Supernus Pharmaceuticals, Inc. v. ~~Aurobindo~~Ajanta Pharma ~~Ltd~~Limited because the lawsuit against Torrent was consolidated with the lawsuit against Ajanta (see Section I above). The Company entered into a settlement agreement with Torrent, and ~~Aurobindo~~on ~~Pharma~~November ~~USA~~5, ~~Inc.~~2025, ~~C.A.~~an NoOrder dismissing the appeal was entered by the Federal Circuit. ~~24-cv-9380~~The ~~(KMW)~~agreement ~~(MJS)~~has (Dbeen submitted to the applicable governmental agencies.~~N.J)~~

~~The Company received a Paragraph IV Notice Letter from generic drug maker Aurobindo Pharma Ltd~~III. ~~dated~~Sage ~~August 9~~Chemical, ~~2024~~Inc., ~~directed~~et toal. ~~eleven of its Oxtellar XR® Orange Book patents~~v. Supernus’s ~~U.S. Patent Nos. 7~~Pharmaceuticals,~~722,898;~~ 7,910,131; 8,617,600; 8,821,930; 9,119,791; 9,351,975; 9,370,525; 9,855,278; 10,220,042; 11,166,960; and 11,896,599 generally cover once-a-day oxcarbazepine formulations and methods of treating seizures using those formulationsInc. ~~The FDA Orange Book lists all eleven of the Company’s Oxtellar XR® patents as expiring on April 13~~, ~~2027.~~et ~~On September 23, 2024, the Company filed a lawsuit against Aurobindo Pharma Ltd~~al. ~~and Aurobindo Pharma USA~~, ~~Inc~~C. ~~(collectively, “Aurobindo”) alleging infringement of the Company’s eleven Oxtellar XR® patents~~A. ~~The Complaint—filed in the U~~No.S. ~~District~~22-cv-1302 ~~Court for the District of New Jersey—alleges, among other things, that Aurobindo infringed the Company’s Oxtellar XR® patents by submitting to the FDA an Abbreviated New Drug Application~~ (~~“ANDA”~~CJB) ~~seeking to market a generic version of Oxtellar XR® prior to the expiration of the Company’s patents~~(D. Filing its September 23, 2024, Complaint within 45 days of receiving Aurobindo’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Aurobindo’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice LetterDel. The Company entered into a settlement agreement with Aurobindo, and on December 9, 2024, a stipulation of dismissal without prejudice was entered by the U.S. District Court for the District of New Jersey. The agreement has been submitted to the applicable governmental agencies.)

~~Trokendi~~On XROctober 3, 2022, Sage Chemical, Inc. and TruPharma, LLC filed a lawsuit in the United States District Court for the District of Delaware alleging that Supernus Pharmaceuticals, Inc., Britannia Pharmaceuticals Limited (Britannia), and US WorldMeds Partners, LLC (US WorldMeds) violated state and federal antitrust law in connection with APOKYN® (apomorphine HCl). On October 16, 2022, Plaintiffs amended their complaint to add additional defendants MDD US Enterprises, LLC, MDD US Operations, LLC (each a subsidiary of Supernus Pharmaceuticals, Inc.), USWM, LLC (USWM), and individual defendants Paul Breckinridge Jones, Sr., Herbert Lee Warren, Jr., Henry Van Den Berg, and Kristin L. Gullo. On January 10, 2023, Defendants filed an Omnibus Motion to Dismiss the Amended Complaint seeking dismissal of each of Plaintiffs’ claims and the lawsuit in its entirety and US WorldMeds with USWM, Britannia, and the group of individual defendants each filed separate motions to dismiss. On May 9, 2024, and May 28, 2024, respectively, the Court denied the Defendants’ omnibus motion and the Britannia motion to dismiss. On May 31, 2024, and June 4, 2024, respectively, the Court granted the individual defendants’ motion to dismiss and the US WorldMeds and USWM motion to dismiss. On December 6, 2024, Plaintiffs filed a second amended complaint, which added US WorldMeds and USWM back to the case. The Court ordered on February 3, 2026, that case dispositive and Daubert motions briefing would begin on June 9, 2026, with a hearing scheduled for September 18, 2026, pretrial conference set for January 15, 2027, and trial beginning January 25, 2027.

~~III~~IV. Supernus Pharmaceuticals, Inc. v. ~~Ajanta~~Appco Pharma ~~Limited~~LLC, et al., C.A. No. 2125-cv-~~6964~~12183 (GCMEF)(~~DEA~~MAH) (D.N.J.), re-captioned as In re Viloxazine, C.A. No. 25-cv-12183 (MEF)(MAH) (Consolidated)

The Company received a Paragraph IV Notice ~~Letter~~Letters from generic drug ~~maker~~makers ~~Ajanta~~Appco Pharma ~~Limited~~LLC (Appco) and Somerset Therapeutics LLC (Somerset) dated ~~February~~May 1021, ~~2021~~2025, and June 9, 2025, directed to ~~ten~~six of its ~~Trokendi XR~~Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 89,~~298~~358,~~576~~204; 89,~~298~~603,~~580~~853; ~~8,663,683; 8,877,248; 8,889,191; 8,992,989;~~ 9,~~549~~662,~~940~~338; 911,~~555~~324,~~004~~753; 911,~~622~~458,~~983~~143; and 1012,~~314~~121,~~790~~523 generally cover ~~once-a-day~~viloxazine ~~topiramate~~ formulations and methods of ~~treating or preventing seizures and migraines~~ using those formulations. The FDA Orange Book currently lists United States Patent NoNos. 89,~~298~~358,~~576~~204 and 9,603,853 as expiring on ~~April~~February 47, ~~2028,~~2033; ~~and~~ United States Patent ~~Nos~~No. 89,~~298~~662,~~580;~~338 ~~8,663,683;~~as ~~8,877,248;~~expiring ~~8,889,191;~~on ~~8,992,989;~~April 92,~~549,940~~ 2035; 9and United States Patent Nos. 11,~~555~~324,~~004~~753; 911,~~622~~458,~~983~~143; and 1012,~~314~~121,~~790~~523 as expiring on ~~November~~September 164, ~~2027~~2029. On ~~March~~June 26, ~~2021~~2025, the Company filed a lawsuit against ~~Ajanta~~Appco ~~Pharma Limited~~ and ~~Ajanta~~Somerset ~~Pharma USA Inc. (collectively “Ajanta”)~~ alleging infringement of the Company’s ~~Trokendi XR~~Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, ~~among~~inter ~~other things~~alia, that ~~Ajanta~~Appco and Somerset infringed the Company’s ~~Trokendi XR~~Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of ~~Trokendi XR~~Qelbree® prior to the expiration of the Company’s patents. Filing its ~~March~~June 26, ~~2021~~2025, Complaint within 45 days of receiving ~~Ajanta~~Appco and Somerset’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving ~~Ajanta’s~~Appco ~~ANDA~~and ~~for 30 months from the date of the Company~~Somerset’s ~~receipt~~ANDA ofuntil ~~the~~October ~~Paragraph IV Notice Letter. On June 7~~2, ~~2021, Ajanta answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity~~2028. ~~Ajanta also asserted Counterclaims seeking declaratory judgments of non‑infringement and invalidity for the Trokendi XR® Orange Book patents.~~ On ~~June~~September 2822, ~~2021~~2025, ~~the~~Appco Company filed its reply, denying the substantive allegations of Ajanta’s Counterclaims. Following the initial Rule 16 Scheduling Conference, the Court issued a case schedule. On December 17, 2021, the Court issued an order consolidating this lawsuit with the lawsuit against Torrent, discussed in Section IV, below. The consolidation order extended the 30‑month stay preventing the FDA from approving Ajanta’s ANDA to December 16, 2023. The Company entered into a settlement agreement with Ajanta, and on April 4, 2023, a stipulation of dismissal without prejudice was entered by the U.S. District Court for the District of New Jersey. The agreement has been submitted to the applicable governmental agencies.

IV. Supernus Pharmaceuticals, Inc. v. Torrent Pharmaceuticals Ltd., et al., C.A. No. 21-cv-14268 (GC)(DEA) (D.N.J.); Supernus Pharmaceuticals, Inc. v. Ajanta Pharma Limited, et al., Appeal No. 2024-1606 (Fed. Cir.)75

The Company received a Paragraph IV Notice Letter from generic drug maker Torrent Pharmaceuticals Ltd. dated June 15, 2021, directed to ten of its Trokendi XR® Orange Book patents. Supernus’s U.S. Patent Nos. 8,298,576; 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 generally cover once-a-day topiramate formulations and methods of treating or preventing seizures and migraines using those formulations. The FDA Orange Book currently lists United States Patent No. 8,298,576 as expiring on April 4, 2028, and United States Patent Nos. 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 as expiring on November 16, 2027. On July 28, 2021, the Company filed a lawsuit against Torrent Pharmaceuticals Ltd. and Torrent Pharma Inc. (collectively,

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~~“Torrent”)~~Somerset alleging infringement of the Company’s Trokendi XR® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, among other things, that Torrent infringed the Company’s Trokendi XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of Trokendi XR® prior to the expiration of the Company’s patents. Filing its July 28, 2021 Complaint within 45 days of receiving Torrent’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Torrent’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter. On September 29, 2021, Torrent answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Appco ~~Torrent~~and Somerset also asserted Counterclaims ~~seeking~~that include requests for declaratory judgments of non‑-infringement ~~for~~and ~~the Trokendi XR® Orange Book patents~~invalidity. On ~~November~~October 328, ~~2021~~2025, the Company filed its reply, denying the substantive allegations of ~~Torrent~~Appco’s ~~Counterclaims. Following~~and ~~the~~Somerset’s ~~initial Rule 16 Scheduling Conference, the Court issued a case schedule~~Counterclaims. On December 1723, ~~2021~~2025, the Court issued an order consolidating this lawsuit for all pretrial purposes with the ~~lawsuit~~lawsuits against ~~Ajanta~~(i) Aurobindo, discussed in Section ~~III~~VI, ~~above. The~~below; ~~Court~~(ii) ~~held~~Apotex, adiscussed ~~bench~~in ~~trial~~Section ~~between~~VIII, ~~July~~below; 31(iii) Zydus, ~~2023~~discussed in Section IX, ~~and~~below; ~~August~~(iv) 3Creekwood, ~~2023.~~discussed ~~Closing~~in ~~arguments~~Section ~~for~~X, ~~the~~below; ~~trial~~(v) ~~were~~MSN, ~~held~~discussed onin ~~October~~Section 4XII, ~~2023.~~below; On(vi) ~~December~~Zenara ~~12,~~and ~~2023~~Biophore, ~~the~~discussed ~~Court~~in ~~issued~~Section anXIV, ~~Order~~below; ~~enjoining~~and ~~Torrent~~(vii) ~~from~~Macleods, ~~launching~~discussed ~~its~~in ~~generic~~Sections ~~drug~~XV ~~product~~and ~~through~~XVII, ~~January~~below. The 31Court’s December 23, ~~2024~~2025, orconsolidation ~~until~~order recaptioned the ~~Court’s~~consolidated ~~trial~~lawsuits ~~decision~~as ~~issues,~~In ~~whichever~~re isViloxazine, ~~sooner~~C.A. No. 25-cv-12183 (MEF)(MAH) (Consolidated). On ~~January~~December 3018, ~~2024~~2025, the Court issued a ~~Trial~~scheduling ~~Opinion~~order ~~and~~for ~~Order,~~the ~~deciding~~consolidated incases ~~Supernus’s favor~~ that ~~the~~provides ~~patent~~for ~~claims~~a ~~that~~close ~~Supernus~~of ~~asserted~~discovery aton ~~trial~~November ~~against~~17, ~~Torrent~~2027. The ~~are~~Court ~~both~~has ~~valid~~not ~~and~~set ~~infringed.~~a ~~The~~date ~~District~~for ~~Court entered~~ a ~~Final~~final ~~Judgment~~pretrial inconference ~~Supernus’s~~or ~~favor~~trial. Pretrial ondiscovery ~~February~~is ~~22,~~ongoing ~~2024~~currently.

On ~~March 4, 2024, Torrent filed a Notice of Appeal of the Final Judgment with the U~~V.S. ~~Court of Appeals for the Federal Circuit. The Federal Circuit docketed the appeal as~~ Supernus Pharmaceuticals, Inc. v. ~~Ajanta~~Appco Pharma ~~Limited~~LLC, ~~because~~et ~~the~~al., ~~lawsuit~~C.A. ~~against~~No. ~~Torrent~~25-cv-807 ~~was previously consolidated with the lawsuit against Ajanta~~ (~~see Section III above~~JLH). ~~The Court has not set the date for oral argument~~(D. Del.)

V.The Company received Paragraph IV Notice Letters from generic drug makers Appco Pharma LLC (Appco) and Somerset Therapeutics LLC (Somerset) dated May 21, 2025, and June 9, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s ~~Pharmaceuticals~~U.S. Patent Nos. 9,358,204; ~~Inc~~9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. vThe FDA Orange Book currently lists United States Patent Nos. ~~Ascent~~9,358,204 ~~Pharmaceuticals~~and ~~Inc~~9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 etas alexpiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On July 1, 2025, the Company filed a lawsuit against Appco and Somerset alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of Delaware—alleges, inter alia, that Appco and Somerset infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its July 1, 2025, Complaint within 45 days of receiving Appco and Somerset’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Appco and Somerset’s ANDA until October 2, 2028. On September 29, 2025, Supernus filed a notice of voluntary dismissal of the Complaint without prejudice. The dismissal will not impact the co‑pending matter against Appco and Somerset, C.A. No. 2325-cv-~~4015~~12183 (GCMEF)(~~DEA~~MAH) (D.N.J.), discussed in Section IV, above.

~~The Company received a Paragraph IV Notice Letter from generic drug maker Ascent Pharmaceuticals Inc~~VI. ~~dated June 15, 2023, directed to ten of its Trokendi XR® Orange Book patents.~~ Supernus’s ~~U.S. Patent Nos. 8~~Pharmaceuticals,~~298,576;~~ 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 generally cover once-a-day topiramate formulations and methods of treating or preventing seizures and migraines using those formulationsInc. ~~The FDA Orange Book currently lists United States Patent No~~v. ~~8,298,576~~Aurobindo as expiring on April 4, 2028, and United States Patent Nos. 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 as expiring on November 16, 2027. On July 26, 2023, the Company filed a lawsuit against Ascent Pharmaceuticals Inc., ("Ascent Pharma") ~~Camber Pharmaceuticals, Inc~~Ltd., ~~and~~et ~~Hetero Labs Ltd~~al. ~~(collectively~~, ~~“Ascent”) alleging infringement of the Company’s Trokendi XR® Orange Book patents~~C. ~~The Complaint—filed in the U~~A.S. District Court for the District of New Jersey—alleges, among other things, that Ascent infringed the Company’s Trokendi XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of Trokendi XR® prior to the expiration of the Company’s patentsNo. ~~Filing~~ ~~its~~25-cv-12186 July 26, 2023 Complaint within 45 days of receiving Ascent’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Ascent’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter. On September 28, 2023, the Court entered a stipulation of dismissal without prejudice as to only defendants Camber and Hetero, which included stipulations that, among other things: (iMEF) ~~Ascent Pharma will not contest personal jurisdiction or venue in this District for this Action;~~ (iiMAH) ~~Camber and Hetero will be bound by any injunction in this Action to the extent it concerns the Ascent ANDA; and~~ (~~iii) Ascent Pharma will collect and produce any relevant discovery that is in the possession, custody, or control of Camber and Hetero~~D. ~~On October 11, 2023, Ascent Pharma answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity~~N. ~~The Company entered into a settlement agreement with Ascent Pharma, and on May 2, 2024, a stipulation of dismissal without prejudice was entered by the U~~J.~~S. District Court for the District of New Jersey. The agreement has been submitted to the applicable governmental agencies.~~ )

VIThe Company received a Paragraph IV Notice Letter from generic drug makers Aurobindo Pharma Limited and Aurobindo Pharma U.S.A., Inc. (collectively, Aurobindo) dated May 29, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s ~~Pharmaceuticals~~U.S. Patent Nos. 9,358,204; ~~Inc~~9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. vThe FDA Orange Book currently lists United States Patent Nos. ~~Micro~~9,358,204 ~~Labs~~and ~~Ltd~~9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 etas alexpiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On June 26, 2025, the Company filed a lawsuit against Aurobindo alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, inter alia, that Aurobindo infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its June 26, 2025, Complaint within 45 days of receiving Aurobindo’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Aurobindo’s ANDA until October 2, 2028. On August 29, 2025, Aurobindo answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. On December 23, 2025, the Court issued an order consolidating this lawsuit for all pretrial purposes with the lawsuits against (i) Appco and Somerset, discussed in Section IV, above; (ii) Apotex, discussed in Section VIII, below; (iii) Zydus, discussed in Section IX, below; (iv) Creekwood, discussed in Section X, below; (v) MSN, discussed in Section XII, below; (vi) Zenara and Biophore, discussed in Section XIV, below; and (vii) Macleods, discussed in Sections XV and XVII, below. The Court’s December 23, 2025, consolidation order recaptioned the consolidated lawsuits as In re Viloxazine, C.A. No. 2425-cv-~~9338~~12183 (~~ZNQ~~MEF)(~~JTQ~~MAH) (Consolidated), and administratively terminated the C.A. No. 25-cv-12186 (MEF)(MAH) (D.N.J.) action.

~~The Company received a Paragraph IV Notice Letter from generic drug maker Micro Labs Ltd~~VII. ~~dated August 13, 2024, directed to ten of its Trokendi XR® Orange Book patents.~~ Supernus’s ~~U.S. Patent Nos. 8~~Pharmaceuticals,~~298,576;~~ 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 generally cover once-a-day topiramate formulations and methods of treating or preventing seizures and migraines using those formulationsInc. ~~The FDA Orange Book currently lists U~~v.S. ~~Patent~~Aurobindo ~~No.~~Pharma ~~8,298,576 as expiring on April 4, 2028, and U~~Ltd.~~S. Patent Nos. 8~~,~~298,580;~~ ~~8,663,683;~~et ~~8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 as expiring on November 16, 2027~~al. ~~On September 20~~, ~~2024, the Company filed a lawsuit against Micro Labs Ltd~~C.A. ~~and Micro Labs USA, Inc~~No. ~~(collectively,~~25-cv-808 ~~“Micro Labs”~~(JLH) ~~alleging infringement of the Company’s Trokendi XR® Orange Book patents~~(D. ~~The Complaint—filed in the U~~Del.S. District Court for the District of New Jersey—alleges, among other things, that Micro Labs infringed the Company’s Trokendi XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) ~~seeking to market a generic version of Trokendi XR®~~

70The Company received a Paragraph IV Notice Letter from generic drug makers Aurobindo Pharma Limited and Aurobindo Pharma U.S.A., Inc. (collectively, Aurobindo) dated May 29, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 9,358,204; 9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. The FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 as expiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On July 1, 2025, the

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~~prior~~Company tofiled ~~the~~a ~~expiration~~lawsuit against Aurobindo alleging infringement of the Company’s Qelbree® Orange Book patents. The ~~Filing~~Complaint—filed ~~its~~in ~~September~~the ~~20,~~U.S. ~~2024,~~District ~~Complaint~~Court ~~within~~for 45the ~~days~~District of ~~receiving~~Delaware—alleges, ~~Micro~~inter ~~Labs’~~alia, ~~Paragraph~~that IVAurobindo ~~certification~~infringed ~~notice~~the ~~entitles~~Company’s ~~Supernus~~Qelbree® topatents anby ~~automatic~~submitting ~~stay~~to ~~preventing~~ the FDA ~~from~~an ~~approving~~Abbreviated ~~Micro~~New ~~Labs’~~Drug Application (ANDA) ~~for~~seeking 30to ~~months~~market ~~from~~a generic version of Qelbree® prior to the ~~date~~expiration of the Company’s ~~receipt~~patents. Filing its July 1, 2025, Complaint within 45 days of ~~the~~receiving Aurobindo’s Paragraph IV ~~Notice~~certification ~~Letter.~~notice ~~The~~entitles ~~Company~~Supernus ~~entered~~to ~~into~~an aautomatic ~~settlement~~stay ~~agreement~~preventing ~~with~~the ~~Micro~~FDA ~~Labs,~~from ~~and~~approving onAurobindo’s ~~December~~ANDA 31until October 2, ~~2024~~2028. On September 29, a2025, ~~stipulation~~Supernus offiled ~~dismissal~~a ~~without~~notice ~~prejudice~~of ~~was~~voluntary ~~entered~~dismissal byof the UComplaint without prejudice.S. The ~~District~~dismissal ~~Court~~will ~~for~~not impact the ~~District~~co‑pending ofmatter ~~New~~against ~~Jersey~~Aurobindo, C.A. ~~The~~No. ~~agreement~~25-cv-12186 ~~has~~(MEF)(MAH) ~~been~~(D.N.J.), ~~submitted~~discussed toin ~~the~~Section ~~applicable~~VI, ~~governmental agencies~~above.

~~APOKYN®~~VIII. Supernus Pharmaceuticals, Inc. v. Apotex Inc., C.A. No. 25-cv-12184 (MEF)(MAH) (D.N.J.)

~~VII~~The Company received a Paragraph IV Notice Letter from generic drug maker Apotex Inc. ~~Sage~~(Apotex) ~~Chemical~~dated May 22, ~~Inc~~2025, directed to six of its Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 9,358,204; et9,603,853; al9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. vThe FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 as expiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On June 26, 2025, the Company filed a lawsuit against Apotex alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, inter alia, that Apotex infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its June 26, 2025, Complaint within 45 days of receiving Apotex’s Paragraph IV certification notice entitles Supernus ~~Pharmaceuticals~~to an automatic stay preventing the FDA from approving Apotex’s ANDA until October 2, ~~Inc~~2028. On September 19, et2025, alApotex answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Apotex also asserted Counterclaims that include requests for declaratory judgments of non-infringement and invalidity. On October 24, 2025, the Company filed its reply, denying the substantive allegations of Apotex’s Counterclaims. On December 23, 2025, the Court issued an order consolidating this lawsuit for all pretrial purposes with the lawsuits against (i) Appco and Somerset, discussed in Section IV, above; (ii) Aurobindo, discussed in Section VI, above; (iii) Zydus, discussed in Section IX, below; (iv) Creekwood, discussed in Section X, below; (v) MSN, discussed in Section XII, below; (vi) Zenara and Biophore, discussed in Section XIV, below; and (vii) Macleods, discussed in Sections XV and XVII, below. The Court’s December 23, 2025, consolidation order recaptioned the consolidated lawsuits as In re Viloxazine, C.A. No. 2225-cv-~~1302~~12183 (~~CJB~~MEF)(MAH) (DConsolidated), and administratively terminated the C.A. ~~Del~~No. 25-cv-12184 (MEF)(MAH) (D.N.J.) action.

~~On October 3, 2022, Sage Chemical, Inc~~IX. ~~and TruPharma, LLC filed a lawsuit in the United States District Court for the District of Delaware alleging that~~ Supernus Pharmaceuticals, Inc., ~~Britannia Pharmaceuticals Limited (“Britannia”), and US WorldMeds Partners, LLC (“US WorldMeds”) violated state and federal antitrust law in connection with APOKYN® (apomorphine HCl)~~v. On ~~October~~Zydus ~~16,~~Lifesciences ~~2022,~~Global ~~Plaintiffs amended their complaint to add additional defendants MDD US Enterprises~~FZE, ~~LLC,~~et ~~MDD US Operations, LLC (each a subsidiary of Supernus Pharmaceuticals, Inc~~al.), ~~USWM, LLC (“USWM”), and individual defendants Paul Breckinridge Jones, Sr~~C.~~, Herbert Lee Warren, Jr~~A., ~~Henry Van Den Berg, and Kristin L~~No. Gullo. On January 10, 2023, Defendants filed an Omnibus Motion to Dismiss the Amended Complaint seeking dismissal of each of Plaintiffs’ claims and the lawsuit in its entirety and US WorldMeds with USWM, Britannia, and the group of individual defendants each filed separate motions to dismiss. On May 9, 2024, and May 28, 2024, respectively, the Court denied the Defendants’ omnibus motion and the Britannia motion to dismiss. On May 31, 2024, and June 4, 2024, respectively, the Court granted the individual defendants’ motion to dismiss and the US WorldMeds and USWM motion to dismiss. On December 6, 2024, Plaintiffs filed a second amended complaint, which added back to the case US WorldMeds and USWM. On November 4, 2024, the Court issued a scheduling order that provides for a Pretrial Conference on December 10, 2025, and a jury trial beginning on January 5, 2026. Pretrial discovery is ongoing as of the date of this submission. On January 3, 2025, the Court issued an Oral Order requiring the parties to “engage in in25-~~person mediation in good faith” and jointly select an agreed~~cv-~~upon~~12188 ~~mediator. The parties are working to schedule the mediation to occur in late April 2025 in compliance with Court’s Oral Order that the mediation conference “occur no later than May 2, 2025~~ (~~unless the parties stipulate to a later date and such date is approved by the Court~~MEF)."(MAH) (D.N.J.)

~~VIII~~The Company received a Paragraph IV Notice Letter from generic drug maker Zydus Lifesciences Global FZE (Zydus FZE) dated May 27, 2025, directed to three of its Qelbree® Orange Book patents. Supernus’s USU.S. ~~WorldMeds~~Patent ~~Partners~~Nos. 9,358,204; ~~LLC~~9,603,853; vand 9,662,338 generally cover viloxazine formulations and methods of using those formulations. ~~Federal~~The ~~Insurance~~FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033, and United States Patent No. 9,662,338 as expiring on April 2, 2035. On June 26, 2025, the Company filed a lawsuit against Zydus FZE, etZydus alPharmaceuticals (USA) Inc., ~~Case~~and ~~Nos~~Zydus Lifesciences Limited (collectively, Zydus) alleging infringement of the Company’s Qelbree® Orange Book patents. The 24Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, inter alia, that Zydus infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its June 26, 2025, Complaint within 45 days of receiving Zydus FZE’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Zydus’s ANDA until October 2, 2028. On September 22, 2025, Zydus answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-CIinfringement and invalidity. Zydus also asserted Counterclaims that include requests for declaratory judgments of non-~~2529~~infringement and invalidity. On October 28, 2025, the Company filed its reply, denying the substantive allegations of Zydus’s Counterclaims. On December 23, 2025, the Court issued an order consolidating this lawsuit for all pretrial purposes with the lawsuits against (i) Appco and Somerset, discussed in Section IV, above; ~~24-CI-4195~~(ii) Aurobindo, discussed in Section VI, above; 24(iii) Apotex, discussed in Section VIII, above; (iv) Creekwood, discussed in Section X, below; (v) MSN, discussed in Section XII, below; (vi) Zenara and Biophore, discussed in Section XIV, below; and (vii) Macleods, discussed in Sections XV and XVII, below. The Court’s December 23, 2025, consolidation order recaptioned the consolidated lawsuits as In re Viloxazine, C.A. No. 25-CIcv-~~4631;~~12183 (MEF)(MAH) (Consolidated), and 24administratively terminated the C.A. No. 25-CIcv-~~6988~~12188 (MEF)(MAH) (D.~~Del~~N.J.) action.

~~Alleged~~X. ~~competitors of~~ Supernus ~~filed a lawsuit against the Company~~Pharmaceuticals, ~~MDD US Enterprises, LLC, and MDD Operations, LLC (collectively "Enterprises") and others in the United States District Court for the District of Delaware (the “Underlying Action”)~~Inc. After a dispute over coverage under certain insurance policies arose, Enterprises commenced a declaratory judgment action against Federal Insurance Company, RSUI Indemnity Company, and StarStone Specialty Insurance Company and others to recover insurance benefitsv. USCreekwood ~~WorldMeds Partners~~Pharmaceuticals, LLC, ~~RSUI and StarStone commenced similar declaratory judgment actions in connection with the Underlying Action~~C. ~~These related actions were recently consolidated~~A. ~~This case is in its early stages~~No. ~~Supernus~~25-cv-13201 ~~awaits~~(MEF)(MAH) ~~responsive pleadings to its Complaint~~(D. ~~Discovery has not yet commenced in the consolidated action~~N. ~~An initial post consolidation court conference is scheduled for February 12, 2025~~J.)

~~IX. Supernus Pharmaceuticals, Inc. v. Old Republic Insurance Company, 8:24-cv-03733-PJM) (D.Maryland)~~77

~~The~~Table ~~action seeks recovery~~ of insurance benefits in connection with the Underlying Action in the US WorldMeds Partners, LLC v Federal Insurance Company case. This case is in its early stages. Supernus awaits a responsive pleading to its Complaint. Discovery has not yet commenced. Contents

The Company received a Paragraph IV Notice Letter from generic drug maker Creekwood Pharmaceuticals, LLC (Creekwood) dated June 4, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 9,358,204; 9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. The FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 as expiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On July 11, 2025, the Company filed a lawsuit against Creekwood alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, inter alia, that Creekwood infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its July 11, 2025, Complaint within 45 days of receiving Creekwood’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Creekwood’s ANDA until October 2, 2028. On September 19, 2025, Creekwood answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Creekwood also asserted Counterclaims that include requests for declaratory judgments of non-infringement and invalidity. On October 24, 2025, the Company filed its reply, denying the substantive allegations of Creekwood’s Counterclaims. On December 23, 2025, the Court issued an order consolidating this lawsuit for all pretrial purposes with the lawsuits against (i) Appco and Somerset, discussed in Section IV, above; (ii) Aurobindo, discussed in Section VI, above; (iii) Apotex, discussed in Section VIII, above; (iv) Zydus, discussed in Section IX, above; (v) MSN, discussed in Section XII, below; (vi) Zenara and Biophore, discussed in Section XIV, below; and (vii) Macleods, discussed in Sections XV and XVII, below. The Court’s December 23, 2025, consolidation order recaptioned the consolidated lawsuits as In re Viloxazine, C.A. No. 25-cv-12183 (MEF)(MAH) (Consolidated), and administratively terminated the C.A. No. 25-cv-13201 (MEF)(MAH) (D.N.J.) action.

XI. Supernus Pharmaceuticals, Inc. v. Creekwood Pharmaceuticals, LLC, C.A. No. 25-cv-880 (JLH) (D. Del.)

XII. Supernus Pharmaceuticals, Inc. v. MSN Pharmaceuticals Inc., C.A. No. 25-cv-13204 (MEF)(MAH) (D.N.J.)

The Company received a Paragraph IV Notice Letter from generic drug maker MSN Pharmaceuticals Inc. (MSN) dated June 5, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 9,358,204; 9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. The FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 as expiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On July 11, 2025, the Company filed a lawsuit against MSN alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, inter alia, that MSN infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its July 11, 2025, Complaint within 45 days of receiving MSN’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving MSN’s ANDA until October 2, 2028. On September 22, 2025, MSN answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. MSN also asserted Counterclaims that include requests for declaratory judgments of non-infringement and invalidity. On October 28, 2025, the Company filed its reply, denying the substantive allegations of MSN’s Counterclaims. On December 23, 2025, the Court issued an order consolidating this lawsuit for all pretrial purposes with the lawsuits against (i) Appco and Somerset, discussed in Section IV, above; (ii) Aurobindo, discussed in Section VI, above; (iii) Apotex, discussed in

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Section VIII, above; (iv) Zydus, discussed in Section IX, above; (v) Creekwood, discussed in Section X, above; (vi) Zenara and Biophore, discussed in Section XIV, below; and (vii) Macleods, discussed in Sections XV and XVII, below. The Court’s December 23, 2025, consolidation order recaptioned the consolidated lawsuits as In re Viloxazine, C.A. No. 25-cv-12183 (MEF)(MAH) (Consolidated), and administratively terminated the C.A. No. 25-cv-13204 (MEF)(MAH) (D.N.J.) action.

XIII. Supernus Pharmaceuticals, Inc. v. MSN Pharmaceuticals Inc., C.A. No. 25-cv-879 (JLH) (D. Del.)

The Company received a Paragraph IV Notice Letter from generic drug maker MSN Pharmaceuticals Inc. (MSN) dated June 5, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 9,358,204; 9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. The FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 as expiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On July 15, 2025, the Company filed a lawsuit against MSN alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of Delaware—alleges, inter alia, that MSN infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its July 15, 2025, Complaint within 45 days of receiving MSN’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving MSN’s ANDA until October 2, 2028. On October 16, 2025, Supernus filed a notice of voluntary dismissal of the Complaint without prejudice. The dismissal will not impact the co-pending matter against MSN, C.A. No. 25-cv-13204 (MEF)(MAH) (D.N.J.), discussed in Section XII, above.

XIV. Supernus Pharmaceuticals, Inc. v. Zenara Pharma Private Ltd., et al. , C.A. No. 25-cv-13207 (MEF)(MAH) (D.N.J.)

The Company received a Paragraph IV Notice Letter from generic drug maker Zenara Pharma Private Limited (Zenara) dated June 9, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 9,358,204; 9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. The FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 as expiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On July 11, 2025, the Company filed a lawsuit against Zenara and Biophore Pharma Inc. (Biophore, and collectively with Zenara, Defendants) alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, inter alia, that Defendants infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its July 11, 2025, Complaint within 45 days of receiving Defendants’ Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Defendants’ ANDA until October 2, 2028. On September 16, 2025, Defendants answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. On December 23, 2025, the Court issued an order consolidating this lawsuit for all pretrial purposes with the lawsuits against (i) Appco and Somerset, discussed in Section IV, above; (ii) Aurobindo, discussed in Section VI, above; (iii) Apotex, discussed in Section VIII, above; (iv) Zydus, discussed in Section IX, above; (v) Creekwood, discussed in Section X, above; (vi) MSN, discussed in Section XII, above; and (vii) Macleods, discussed in Sections XV and XVII, below. The Court’s December 23, 2025, consolidation order recaptioned the consolidated lawsuits as In re Viloxazine, C.A. No. 25-cv-12183 (MEF)(MAH) (Consolidated), and administratively terminated the C.A. No. 25-cv-13207 (MEF)(MAH) (D.N.J.) action.

XV. Supernus Pharmaceuticals, Inc. v. Macleods Pharmaceuticals Ltd., et al. , C.A. No. 25-cv-15399 (MEF)(MAH) (D.N.J.)

The Company received a Paragraph IV Notice Letter from generic drug maker Macleods Pharmaceuticals Ltd. (Macleods Ltd.) dated August 1, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 9,358,204; 9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. The FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 as expiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On September 9, 2025, the Company filed a lawsuit against Macleods Pharmaceuticals Ltd. and Macleods Pharma USA, Inc. (Macleods USA and collectively with Macleods Ltd., Defendants) alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, inter alia, that Defendants infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its September 9, 2025, Complaint within 45 days of receiving Defendants’ Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Defendants’ ANDA

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until October 2, 2028. On September 29, 2025, Defendants answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Defendants also asserted Counterclaims that include requests for declaratory judgments of non-infringement and invalidity. On November 3, 2025, the Company filed its reply, denying the substantive allegations of Defendants’ Counterclaims. On December 23, 2025, the Court issued an order consolidating this lawsuit for all pretrial purposes with the lawsuits against (i) Appco and Somerset, discussed in Section IV, above; (ii) Aurobindo, discussed in Section VI, above; (iii) Apotex, discussed in Section VIII, above; (iv) Zydus, discussed in Section IX, above; (v) Creekwood, discussed in Section X, above; (vi) MSN, discussed in Section XII, above; (vii) Zenara and Biophore, discussed in Section XIV, above; and (viii) Macleods, discussed in Section XVII, below. The Court’s December 23, 2025, consolidation order recaptioned the consolidated lawsuits as In re Viloxazine, C.A. No. 25-cv-12183 (MEF)(MAH) (Consolidated), and administratively terminated the C.A. No. 25-cv-15399 (MEF)(MAH) (D.N.J.) action.

XVI. Supernus Pharmaceuticals, Inc. v. Macleods Pharmaceuticals Ltd., et al. , C.A. No. 25-cv-1146 (JLH) (D. Del.)

The Company received a Paragraph IV Notice Letter from generic drug maker Macleods Pharmaceuticals Ltd. (Macleods Ltd.) dated August 1, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 9,358,204; 9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. The FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 as expiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On September 15, 2025, the Company filed a lawsuit against Macleods Pharmaceuticals Ltd. and Macleods Pharma USA, Inc. (Macleods USA and collectively with Macleods Ltd., Defendants) alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of Delaware—alleges, inter alia, that Defendants infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its September 15, 2025, Complaint within 45 days of receiving Defendants’ Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Defendants’ ANDA until October 2, 2028. On October 22, 2025, Supernus filed a notice of voluntary dismissal of the Complaint without prejudice. The dismissal will not impact the co-pending matter against Defendants, C.A. No. 25-cv-15399 (MEF)(MAH) (D.N.J.), discussed in Section XV, above.

XVII. Supernus Pharmaceuticals, Inc. v. Macleods Pharmaceuticals Ltd., et al. , C.A. No. 25-cv-18683 (MEF)(MAH) (D.N.J.)

The Company received a Paragraph IV Notice Letter from generic drug maker Macleods Pharmaceuticals Ltd. (Macleods Ltd.) dated November 20, 2025, directed to six of its Qelbree® Orange Book patents. Supernus’s U.S. Patent Nos. 9,358,204; 9,603,853; 9,662,338; 11,324,753; 11,458,143; and 12,121,523 generally cover viloxazine formulations and methods of using those formulations. The FDA Orange Book currently lists United States Patent Nos. 9,358,204 and 9,603,853 as expiring on February 7, 2033; United States Patent No. 9,662,338 as expiring on April 2, 2035; and United States Patent Nos. 11,324,753; 11,458,143; and 12,121,523 as expiring on September 4, 2029. On December 16, 2025, the Company filed a lawsuit against Macleods Pharmaceuticals Ltd. and Macleods Pharma USA, Inc. (Macleods USA and collectively with Macleods Ltd., Defendants) alleging infringement of the Company’s Qelbree® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of Delaware—alleges, inter alia, that Defendants infringed the Company’s Qelbree® patents by submitting to the FDA an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Qelbree® prior to the expiration of the Company’s patents. Filing its December 16, 2025, Complaint within 45 days of receiving Defendants’ Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Defendants’ ANDA until October 2, 2028. On December 23, 2025, the Court issued an order consolidating this lawsuit for all pretrial purposes with the lawsuits against (i) Appco and Somerset, discussed in Section IV, above; (ii) Aurobindo, discussed in Section VI, above; (iii) Apotex, discussed in Section VIII, above; (iv) Zydus, discussed in Section IX, above; (v) Creekwood, discussed in Section X, above; (vi) MSN, discussed in Section XII, above; (vii) Zenara and Biophore, discussed in Section XIV, above; and (viii) Macleods, discussed in Section XV, above. The Court’s December 23, 2025, consolidation order recaptioned the consolidated lawsuits as In re Viloxazine, C.A. No. 25-cv-12183 (MEF)(MAH) (Consolidated), and administratively terminated the C.A. No. 25-cv-18683 (MEF)(MAH) (D.N.J.) action. On January 23, 2026, Defendants answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Defendants also asserted Counterclaims that include requests for declaratory judgments of non-infringement and invalidity. The Company will answer the Counterclaims by February 27, 2026.

XVIII. US WorldMeds Partners, LLC v. Federal Insurance Company, et al, Case Nos. 24-CI-2529; 24-CI-4195; 24-CI-4631; and 24-CI-6988) (D.Del)

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Alleged competitors of Supernus filed a lawsuit against the Company, MDD US Enterprises, LLC, and MDD Operations, LLC (collectively Enterprises) and others in the United States District Court for the District of Delaware (the Underlying Action). After a dispute over coverage under certain insurance policies arose, Enterprises commenced a declaratory judgment action against Federal Insurance Company, RSUI Indemnity Company, and StarStone Specialty Insurance Company and others to recover insurance benefits. US WorldMeds Partners, LLC, RSUI and StarStone commenced similar declaratory judgment actions in connection with the Underlying Action. These related actions were recently consolidated. This case is in its early stages. Supernus awaits responsive pleadings to its Complaint. Discovery has not yet commenced in the consolidated action. A court conference was held on May 14, 2025, and the next conference was scheduled for August 4, 2025. On August 4, 2025, after discussing the issues in the case, the judge ordered the parties to submit a joint proposed scheduling order outlining deadlines for the amendment of pleadings and completion of discovery on the coverage issues by August 22, 2025. A virtual status conference was held on January 28, 2026. Thereafter, the Court entered a Scheduling Order, which allows the parties to realign the pleadings and proceed with discovery. The next scheduled conference will be held in person on May 6, 2026.

XIX. Supernus Pharmaceuticals, Inc. v. Old Republic Insurance Company, 8:24-cv-03733-PJM) (D.Maryland)

The action seeks recovery of insurance benefits in connection with the Underlying Action in the US WorldMeds Partners, LLC v Federal Insurance Company case. This case is in its early stages. The defendant insurer made a pre-answer motion to dismiss the Complaint. Supernus's opposition to the motion was filed in May 2025. Oral argument on the motion was held on February 12, 2026, and Supernus awaits a decision from the court.

XX. US WorldMeds Partners, LLC v. Supernus Pharmaceuticals, Inc., [C.A. No. N25C-07-121-KMM [CCLD]] (Delaware Superior Court)

On April 30, 2025, the Company informed US WorldMeds Partners, LLC (Partners), the seller of US WorldMeds Enterprises, LLC n/k/a MDD US Enterprises, LLC that it would be withholding $27.7 million of a $30.0 million milestone payment pursuant to the set-off provision of the Sale and Purchase Agreement between the parties. On May 21, 2025, Partners filed a one-count complaint for specific performance in the Delaware Court of Chancery, seeking payment of the withheld amount, plus interest, attorneys’ fees, and costs. On June 16, 2025, the Company filed a motion to dismiss Partners’ complaint on the grounds that the Court of Chancery lacked subject matter jurisdiction. On July 15, 2025, Partners dismissed its complaint and re-filed in the Delaware Superior Court with a companion motion to seal, seeking identical relief. The Company timely filed an Answer under seal on August 6, 2025. On October 3, 2025, Partners filed a motion for summary judgment and related briefing. The parties reached agreement on a stipulated briefing schedule, which the Court entered as an order. The Company’s opposition and cross motion for summary judgment was timely filed December 5, 2025; Partners filed a reply and opposition to the cross motion January 16, 2026; the Company filed a reply on February 9, 2026. Oral argument has been scheduled for March 4, 2026.

Adamas Litigation

In November 2012, Adamas Pharmaceuticals, Inc. (Adamas) granted Forest Laboratories Holdings Limited, an indirect wholly-owned subsidiary of Allergan plc (Forest), an exclusive license to certain of Adamas's intellectual property rights relating to human therapeutics containing memantine in the United States. Under the terms of that license agreement, Forest has the right to enforce such intellectual property rights which are related to its right to market and sell Namzaric and NAMENDA XR for the treatment of moderate to severe dementia related to Alzheimer's disease. Adamas has a right to participate in, but not control, such enforcement actions by Forest.

Since 2018 multiple generic companies have launched generic versions of NAMENDA XR. A number of companies have submitted ANDAs including one or more certifications to the FDA, pursuant to 21 U.S.C. § 355(j)(2)(A)(vii)(iv), requesting approval to manufacture and market generic versions of Namzaric, on which Adamas became entitled to receive royalties from Forest beginning in May 2020.

71Adamas and Forest have settled with all such Namzaric ANDA filers, including all first filers on all the available dosage forms of Namzaric. Subject to those agreements, the earliest date on which any of these agreements grant a license to market a

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~~Adamas and Forest have settled with all such~~ Namzaric ANDA filers, including all first filers on all the available dosage forms of Namzaric. Subject to those agreements, the earliest date on which any of these agreements grant a license to market a Namzaric ANDA filer's generic version of Namzaric is January 1, 2025 (or earlier in certain circumstances). Alternatively, the Namzaric ANDA filers with the earliest date have the option to launch an authorized generic version of Namzaric beginning on January 1, 2026 instead of launching their own generic version of Namzaric on January 1, 2025. Adamas and Forest intend to continue to enforce the patents associated with Namzaric.

On April 1, 2019, Adamas was served with a complaint filed in the United States District Court for the Northern District of California (Case No. 3:18-cv-03018-JCS) against it and several Forest and Allergan entities alleging violations of federal and state false claims acts (FCA) in connection with the commercialization of NAMENDA XR and Namzaric by Allergan. The lawsuit is a qui tam complaint brought by a named individual, Zachary Silbersher, asserting rights of the Federal government and various state governments. The lawsuit was originally filed in May 2018 under seal, and Adamas became aware of the lawsuit when it was served. The complaint alleges that patents held by Allergan and Adamas covering NAMENDA XR and Namzaric were procured through fraud on the United States Patent and Trademark Office and that these patents were asserted against potential generic manufacturers of NAMENDA XR and Namzaric to prevent the generic manufacturers from entering the market, thereby wrongfully excluding generic competition resulting in artificially high prices being charged to government payors.

Adamas's patents in question were licensed exclusively to Forest. The complaint includes a claim for damages of “potentially more than $2.5 billion dollars,” treble damages and statutory penalties. To date the federal and state governments have declined to intervene in this action. This case is currently stayed pending Adamas's and Allergan's interlocutory appeal of the District Court's December 11, 2020 order denying Adamas's and Allergan's motions to dismiss the complaint. The appeal was heard by the United States Court of Appeals for the Ninth Circuit (Case No. 21-80005). Argument was held on January 10, 2022. On August 25, 2022, the Ninth Circuit sided with the defendants by reversing the District Court’s public disclosure bar rulings and remanding the case back to the District Court to decide certain issues in the first instance. On October 11, 2022, the plaintiff filed a petition for rehearing with the Ninth Circuit, which was denied. On December 23, 2022, defendants filed renewed motions to dismiss directed to the remaining unresolved issue. On March 20, 2023, the District Court entered an order and final judgment dismissing with prejudice the FCA claim while declining to exercise supplemental jurisdiction over the state false claims act claims which were dismissed without prejudice. On April 19, 2023, the plaintiff appealed the District Court's dismissal of the Federal False Claims Act claim. On February 20, 2024, the plaintiff filed a motion for an indicative ruling and to set aside the judgment in the District Court, based on the same arguments raised in his appeal. That motion was fully briefed and the District Court determined that the motion for an indicative ruling was suitable for determination without a hearing. On May 7, 2024, the District Court denied the plaintiff’s motion for an indicative ruling. The appeal is fully briefed, and the Ninth Circuit heard oral argument on November 21, 2024. On January 29, 2025, the Ninth Circuit affirmed the District Court’s order dismissing the litigation. ~~The~~On ~~plaintiff~~March ~~intends~~31, to2025, ~~file~~the plaintiff filed a ~~Petition~~petition for ~~Panel~~rehearing ~~and~~by Enthe ~~Banc~~Ninth ~~Rehearing~~Circuit, ~~and~~but ~~has asked~~ the Ninth Circuit denied the Petition on April 15, 2025. The plaintiff opted not to ~~extend~~seek ~~his~~review ~~filing~~from ~~deadline~~the ~~until~~U.S. ~~March~~Supreme ~~31,~~Court. ~~2025~~It remains to be seen whether he will attempt to refile any of his state-law FCA claims.

On December 10, 2019, a putative class action lawsuit alleging violations of the federal securities laws was filed by Ali Zaidi against Adamas and certain of Adamas's former directors and officers in federal court in the Northern District of California (Case No. 4:19-cv-08051). This lawsuit alleges violations of the Securities Exchange Act of 1934 by Adamas and certain of Adamas's former directors and officers. On October 8, 2021, the presiding judge dismissed the litigation, and granted Plaintiffs leave to amend their complaint. On November 5, 2021, Plaintiffs filed their second amended class action complaint. On December 10, 2021, Adamas filed a motion to dismiss the Second Amended Complaint. Plaintiffs opposed the motion to dismiss. On January 13, 2023, the Court granted in part and denied in part Defendants’ Motion to Dismiss. All claims against Adamas have been dismissed with prejudice, but claims against one of the individual defendants, who may have certain rights to indemnification, remain. On February 27, 2023, Plaintiffs advised the Court that Plaintiffs would proceed only on the remaining claim against one of the individual defendants. The individual defendant filed an answer denying the claim on April 28, 2023. On September 21, 2023, the parties reached an agreement in principle to settle the Zaidi litigation, subject to court approval. On October 31, 2023, the Court granted the parties' stipulation staying all proceedings and vacating all existing deadlines. On April 2, 2024, the Court preliminarily approved the settlement of the case, including a $4.7 million payment from insurers, subject to further consideration at a settlement hearing to be held in September 2024. On September 27, 2024, the Court granted final approval of the class action settlement, dismissed the lawsuit with prejudice, and final judgment was entered.

Adamas believes it has strong factual and legal defenses to all actions and intends to defend itself vigorously.

Sage Therapeutics Litigation

On August 28, 2024, named plaintiff Darren Korver filed a purported federal securities class action lawsuit in the Southern District of New York against Sage Therapeutics, Inc. and individuals, Barry E. Greene and Kimi Iguchi (the Securities Class Action), both of whom are former officers of Sage. Pursuant to a statutorily prescribed process, the court appointed two new class representatives, Steamfitters Local 449 Pension & Retirement Security Funds and Trust of the Retirement System of the UPR, who filed an amended complaint on March 3, 2025, against the original defendants and five additional former officers of Sage. The amended complaint in the Securities Class Action alleges violations of U.S. securities laws under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended (the Exchange Act) and Rule 10b-5 promulgated thereunder and seeks an as-yet unspecified amount of damages allegedly sustained by parties who purchased the Sage Therapeutic’s stock between April 12, 2021 and July 23, 2024, as well as applicable attorneys’ fees and costs. On April 17, 2025, Sage Therapeutics, along with all of the individual defendants, filed a motion to dismiss the Securities Class Action in the Southern District of New York. As of January 9, 2026, the motion remains pending before the Court. Related derivative actions remain stayed pending the resolution of this motion. Sage denies any allegations of wrongdoing and intends to vigorously defend against the Securities Class Action.

On October 16, 2024, Sage Therapeutics received a subpoena from the Enforcement Division of the SEC requesting documents and information related to Sage's NDA for zuranolone for the treatment of MDD, including communications with the FDA and any communications containing material nonpublic information. Sage Therapeutics is cooperating with the SEC and intends to continue to provide information responsive to the SEC’s requests.

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On March 26, 2025, plaintiff shareholder Qingping Zhu commenced derivative litigation in the Southern District of New York, purportedly on behalf of Sage, against sixteen current and former officers and directors of Sage (the Zhu Derivative Litigation). Based significantly on the allegations underlying the Securities Class Action, the Zhu Derivative Litigation alleges violations of Section 14(a) of the Exchange Act and Rule 14a-9 promulgated thereunder, breaches of fiduciary duty, unjust enrichment, and waste of corporate assets, and seeks unspecified damages and various equitable relief. On April 14, 2025, the Southern District of New York granted a stay of the Zhu Derivative Litigation pending the resolution of the motion to dismiss the amended complaint in the Securities Class Action.

On May 13, 2025, plaintiff shareholder Jurgen Matton commenced derivative litigation in the Southern District of New York, purportedly on behalf of Sage Therapeutics, against sixteen current and former officers and directors of Sage Therapeutics (the Matton Derivative Litigation). Based significantly on the allegations underlying the Securities Class Action, the Matton Derivative Litigation alleges violations of Section 14(a) of the Exchange Act and Rule 14a-9 promulgated thereunder, breaches of fiduciary duty, unjust enrichment, and waste of corporate assets, and seeks unspecified damages and various equitable relief.

On May 22, 2025, plaintiff shareholder Joseph Pizzelanti commenced derivative litigation in the Southern District of New York, purportedly on behalf of Sage Therapeutics, against sixteen current and former officers and directors of the Company (the Pizzelanti Derivative Litigation). Based significantly on the allegations underlying the Securities Class Action, the Pizzelanti Derivative Litigation alleges violations of Section 14(a) of the Exchange Act and Rule 14a-9 promulgated thereunder, breaches of fiduciary duty, unjust enrichment, and waste of corporate assets, and seeks unspecified damages and various equitable relief.

On June 20, 2025, Sage, along with other relevant parties, submitted for the Southern District of New York’s approval of a consolidation of the Zhu Derivative Litigation with the Matton Derivative Litigation and the Pizzelanti Derivative Litigation and the court approved such consolidation (the Consolidated Derivative Litigation).

As of September 30, 2025, two complaints have been filed in state court by purported stockholders of Sage Therapeutics regarding the Agreement and Plan of Merger (the Merger Agreement), dated as of June 13, 2025, by and among Sage Therapeutics, Inc., Supernus Pharmaceuticals, Inc., a Delaware corporation, and Saphire, Inc., a Delaware corporation. On July 8, 2025, a purported stockholder of Sage Therapeutics filed a complaint against Sage Therapeutics and each member of the Board in the Supreme Court of the State of New York, County of New York, captioned Taylor v. Sage Therapeutics, Inc., et al., Index No. 654060/2025 (the Taylor Complaint). On July 9, 2025, a purported stockholder of Sage Therapeutics filed a complaint against Sage Therapeutics and each member of the Board in the Supreme Court of the State of New York, County of New York, captioned Morgan v. Sage Therapeutics, Inc., et al., Index No. 654094/2025 (together with the Taylor Complaint, the Merger Complaints). The Merger Complaints assert, among other things, claims for negligent misrepresentation and concealment and negligence under New York common law against all defendants. The Merger Complaints allege that Sage Therapeutic’s Solicitation/Recommendation Statement on Schedule 14D-9 filed with the SEC on July 2, 2025, together with the exhibits and annexes thereto (the Schedule 14D-9), omitted certain purportedly material information. Among other relief, the Merger Complaints seek (i) an injunction prohibiting consummation of the transactions contemplated by the Merger Agreement (the Transactions), (ii) rescission or actual and punitive damages if the Transactions are consummated, and (iii) an award of the plaintiffs’ fees and expenses, including reasonable attorneys’ and experts’ fees and expenses. Sage Therapeutics has also received certain demand letters from purported stockholders making allegations similar to those contained in the Merger Complaints. Additional lawsuits arising out of or relating to the Merger Agreement may be filed in the future.

At this time, the Company is unable to predict the outcome of the Securities Class Action, the SEC investigation, the Consolidated Derivative Litigation, or the Merger Complaints, or reasonably estimate a range of possible losses.

ITEM 4. MINE SAFETY DISCLOSURES.

Not applicable.

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PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASE OF EQUITY SECURITIES.

Market and Shareholder Information

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Our common stock has been listed on the NASDAQ Global Market under the symbol "SUPN" since May 1, 2012.

On December 31, ~~2024~~2025, the closing price of our common stock on the NASDAQ Global Market was $3649.1670 per share. As of December 31, ~~2024~~2025, we had 15 holders of record of our common stock. The actual number of common stockholders is greater than the number of record holders and includes stockholders who are beneficial owners but whose shares are held in street name by brokers and other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

Dividends

We have never declared or paid any cash dividends on our capital stock, and we do not currently anticipate declaring or paying cash dividends on our capital stock in the foreseeable future. We currently intend to retain all of our future earnings, if any, to finance operations. Any future determination relating to our dividend policy will be made at the discretion of our board of directors and will depend on a number of factors, including future earnings, capital requirements, financial conditions, future prospects, contractual restrictions and covenants, and other factors that our board of directors may deem relevant.

Performance Graph

The following graph sets forth the Company's total cumulative stockholder return as compared to the NASDAQ Stock Market Composite Index and the NASDAQ Biotechnology Index for the period beginning December 31, ~~2019~~2020, and ending December 31, ~~2024~~2025.

Total stockholder return assumes $100 invested at the beginning of the period in the common stock of the Company, the stocks represented in the NASDAQ Composite Index and the NASDAQ Biotechnology Index, respectively. Total return assumes reinvestment of dividends; the Company has paid no dividends on its common stock. Historical price performance should not be relied upon as indicative of future stock performance.

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*$100 invested on 12/31/~~2019~~2020 in stock or index, including reinvestment of dividends. Fiscal year ending December 31.

Performance Graph Data

	SupernusPharmaceuticals, Inc.	NASDAQ CompositeIndex	NASDAQ Biotechnology Index
December 31, 2019	100.00	100.00	100.00
December 31, 2020	100.00	100.00	100.00
December 31, 2020	106.07	144.92	126.42
December 31, 2021	115.90	122.18	100.02
December 31, 2021	122.01	177.06	126.45
December 31, 2022	141.77	82.43	89.90
December 31, 2022	150.38	119.45	113.65
December 31, 2023	115.02	119.22	94.03
December 31, 2023	122.01	172.77	118.87
December 31, 2024	143.72	154.48	93.49
December 31, 2024	152.45	223.87	118.20
December 31, 2025	197.54	187.14	124.75

The performance graph and related information shall not be deemed "soliciting material" or be "filed" with the SEC, nor shall such information be incorporated by reference into any future filing under the Securities Act or the Exchange Act, except to the extent that the Company specifically incorporates it by reference into such filing.

ITEM 6. RESERVED.

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ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

You should read the following discussion and analysis of our financial condition and results of operations together with our consolidated financial statements and related notes thereto, appearing elsewhere in this Annual Report on Form 10-K. In addition to historical information, some of the information in this discussion and analysis contains forward-looking statements reflecting our current expectations and involving risk and uncertainties. For example, statements regarding our expectations as to our plans and strategy for our business, future financial performance, expense levels, and liquidity sources are forward-looking statements. Our actual results and the timing of those events could differ materially from those discussed in our forward-looking statements because of many factors, including those set forth under the "Risk Factors" section and elsewhere in this report.

Unless the content requires otherwise, the words "Supernus," "we," "our" and "the Company" refer to Supernus Pharmaceuticals, Inc. and/or one or more of its subsidiaries, as the case may be. These terms are used solely for the convenience of the reader. Supernus Pharmaceuticals, Inc. and each of its subsidiaries are distinct legal entities. For example, MDD US Operations, LLC, a wholly-owned indirect subsidiary of Supernus Pharmaceuticals, Inc., is the exclusive licensee and distributor of APOKYN in the United States and its territories. Adamas Operations, LLC, a wholly-owned indirect subsidiary of Supernus Pharmaceuticals, Inc., wholly owns the patents and patent applications related to GOCOVRI and Osmolex ER and has a license agreement with Supernus Pharmaceuticals, Inc., granting Supernus Pharmaceuticals, Inc. rights to market and sell GOCOVRI and Osmolex ER. Sage Therapeutics, LLC, a wholly-owned indirect subsidiary of Supernus Pharmaceuticals, Inc., has granted Supernus Pharmaceuticals, Inc. a license to market and sell zuranolone in the United States.

Overview

We are a biopharmaceutical company focused on developing and commercializing products for the treatment of central nervous system (CNS) diseases. Our diverse neuroscience portfolio includes approved treatments for attention-deficit hyperactivity disorder (ADHD), dyskinesia in Parkinson's Disease (PD) patients receiving levodopa-based therapy, hypomobility in PD, postpartum depression (PPD), epilepsy, migraine, cervical dystonia, and chronic sialorrhea. We are developing a broad range of novel CNS product candidates including new potential treatments for epilepsy, depression, and other CNS disorders.

2025 Acquisition of Sage Therapeutics, Inc. (Sage) and Reorganization

On July 31, 2025, the Company completed its previously announced acquisition of Sage when Saphire, Inc., a Delaware corporation and wholly owned subsidiary of the Company (Purchaser), was merged with and into Sage (the Merger), with Sage continuing as the surviving corporation in the Merger as a wholly owned subsidiary of the Company (the Sage Acquisition). At the time of the Sage Acquisition, Sage had an established commercial product in its portfolio, ZURZUVAE.

Following the Sage Acquisition, during the third quarter of 2025, Sage Therapeutics, Inc. was reorganized into Sage Therapeutics, LLC.

We have a portfolio of commercial products and product candidates.

Commercial Products

•Qelbree® (viloxazine) extended-release capsules isare a novel non-stimulant product indicated for the treatment of ADHD in adults and pediatric patients 6 years and older. The United States Food and Drug Administration (FDA) approved Qelbree for the treatment of ADHD in pediatric patients 6 to 17 years of age in April 2021, and in adult patients in April 2022. The Company launched Qelbree for pediatric patients in May 2021 and for adult patients in May 2022 in the United States (U.S.). In January 2025, the FDA approved an expanded label update for Qelbree to include new data on the pharmacodynamics and use in breastfeeding mothers.

•GOCOVRI® (amantadine) extended-release capsules isare the first and only FDA approved medicine indicated for the treatment of dyskinesia in patients with PD receiving levodopa-based therapy, with or without concomitant dopaminergic medications, and as an adjunctive treatment to levodopa/carbidopa with PD experiencing "OFF" episodes.

•~~Oxtellar~~ONAPGOTM ~~XR®~~ (~~oxcarbazepine~~apomorphine hydrochloride) injection is ~~indicated~~the asfirst ~~therapy~~and only subcutaneous apomorphine infusion device for the treatment of ~~partial~~motor ~~onset~~fluctuations ~~seizures~~ in ~~patients~~adults 6with ~~years~~advanced ~~of age and older~~PD. ItONAPGO iswas ~~also~~approved by the ~~first~~FDA ~~once-daily~~in ~~extended-release~~February ~~oxcarbazepine~~2025. ~~product~~ONAPGO ~~indicated~~was ~~for~~launched ~~the treatment of epilepsy~~ in ~~the~~April U2025.~~S. market.~~

•ZURZUVAE® (zuranolone) capsules are the first and only FDA approved oral medicine indicated for the treatment of PPD in adults. ZURZUVAE is a neuroactive steroid that is a positive allosteric modulator of GABAA receptors, targeting

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both synaptic and extrasynaptic GABAA receptors, and is the first oral, once-daily, 14-day treatment specifically indicated for adults with PPD. ZURZUVAE became commercially available in the U.S. in December 2023 as a treatment option for women with PPD. We and our collaboration partner, Biogen, are jointly commercializing ZURZUVAE in the U.S. under a collaboration agreement (Biogen Collaboration Agreement). The Company and Biogen equally share in all operating profits and losses arising from sales of ZURZUVAE in the U.S., with Biogen recording such product sales.

•APOKYN® (apomorphine hydrochloride injection) is a product indicated for the acute, intermittent treatment of hypomobility, "OFF" episodes ("end-of-dose wearing off" and unpredictable "ON/OFF" episodes) in patients with advanced PD.

•Trokendi XR® (topiramate) is the first once-daily extended-release topiramate product indicated for the treatment of epilepsy in patients 6 years of age and older in the U.S. market. It is also indicated for the prophylaxis of migraine headache in adults and adolescents 12 years and older.

•Oxtellar XR® (oxcarbazepine) is indicated as therapy for the treatment of partial onset seizures in patients 6 years of age and older. It is also the first once-daily extended-release oxcarbazepine product indicated for the treatment of epilepsy in the U.S. market.

•XADAGO® (safinamide) is a once-daily product indicated as adjunctive treatment to levodopa/carbidopa in patients with PD experiencing "OFF" episodes.

•MYOBLOC® (rimabotulinumtoxinB injection) is a product indicated for the treatment of cervical dystonia and chronic sialorrhea in adults. It is the only botulinum toxin type B available on the market.

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•ONAPGOTM (apomorphine hydrochloride) injection is the first and only subcutaneous apomorphine infusion device for the treatment of motor fluctuations in adults with advanced PD. ONAPGO was approved by the FDA in February 2025 and received an Orphan Drug Designation. ONAPGO will be launched in the second quarter of 2025.

Research and Development

We are committed to the development of innovative product candidates in neurology and psychiatry, including the following: Screenshot 2026-02-19 141947.jpg

SPN-817 (huperzine A)

SPN-817 represents a novel mechanism of action (MOA) for an anticonvulsant. SPN-817 is a novel synthetic form of huperzine A, whose MOA includes potent acetylcholinesterase inhibition, with pharmacological activities in CNS conditions such as epilepsy. The development will initially focus on the drug's anticonvulsant activity, which has been shown in preclinical models to be effective for the treatment of partial seizures and Dravet Syndrome. SPN-817 is in clinical development ~~and has received Orphan Drug Designation for several epilepsy indications from the FDA~~.

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SPN-820 (NV-5138)

SPN-820 is a novel, first- in- class, ~~orally~~intracellular ~~active~~enhancer ~~small~~of ~~molecule that increases the brain~~ mechanistic target of rapamycin complex 1 (mTORC1) ~~mediated~~signaling. ~~synaptic~~Depression ~~function~~is ~~intracellularly.~~associated ~~SPN-820~~with ~~does~~synapse ~~not~~loss ~~bind~~and toreduced orsynaptic ~~modulate~~plasticity ~~any~~in ~~cell~~key ~~surface~~brain ~~receptors~~regions ~~and~~including ~~therefore~~the isprefrontal ~~unlikely~~cortex toand ~~have~~increasing ~~abuse~~mTORC1-mediated ~~potential~~synaptic ~~given~~plasticity ~~lack~~is ofa ~~binding~~potential avenue to ~~targets~~treat ~~implicated~~depression inand ~~drug~~associated ~~abuse~~symptoms. InSPN-820 ~~addition,~~selectively ~~unlike~~binds ~~leucine,~~to itintracellular issestrin ~~not~~proteins ~~incorporated~~and ~~into~~subsequently ~~proteins~~engages ~~during~~a cascade of multi-protein ~~synthesis~~complexes, ~~and~~enhancing ~~therefore,~~mTORC1 itsignaling. isThe ~~more~~intracellular ~~available~~mechanism atand the ~~target~~lack ~~site~~of inbinding to cell surface receptors suggests the ~~brain~~potential ~~than~~for ~~leucine~~a differentiated safety profile and is unlikely to have abuse potential.

In February 2025, the Company reported topline results from a randomized double-blind placebo-controlled Phase 2b study of SPN-820 in adults with treatment-resistant depression (TRD) following four weeks of chronic daily dosing. The study did not demonstrate a statistically significant improvement on the primary and secondary endpoints. The safety profile of SPN-820 was consistent with previous clinical trials, showing few adverse events.

The Company initiated a follow-on Phase 2b multi-center, randomized, double-blind, placebo-controlled trial in approximately 200 adults with MDD. The study will examine the safety and tolerability of SPN-820 2400 mg given intermittently (twice weekly) as an adjunctive treatment to the current baseline antidepressant therapy, as well as assess the rapid onset of improvement in depressive symptoms.

SPN-443 – Novel stimulant for the treatment of ADHD/CNS

The Company completed a Phase 1 single dose study in healthy adults in 2024 following submission of an Investigational New Drug Application. The study was a first in human, pilot pharmacokinetic study of two oral formulations of SPN-443 in healthy adults. The primary objective of the study was to assess safety and tolerability. This molecule, along with its major metabolites, is an inhibitor of norepinephrine, dopamine and serotonin, also known as a triple reuptake inhibitor. Both formulations of SPN-443 showed adequate bioavailability and were well tolerated. The Company plans to initiate Single Ascending Dose (SAD) and Multiple Ascending Dose (MAD) studies in the second half of 2026.

~~Qelbree~~Zuranolone ~~Highlights~~

•The ~~FDA~~Company has ~~approved~~granted anBiogen ~~update~~sole ~~for~~rights to develop and commercialize zuranolone outside the ~~label~~U.S., ~~for~~other ~~Qelbree~~than in Japan, Taiwan and South Korea where it has granted those rights to ~~include~~Shionogi & Co., Ltd. (Shionogi). Shionogi is currently developing zuranolone for the treatment of patients with MDD in Japan, and in the third quarter of 2024, Shionogi reported that it submitted a new ~~pharmacodynamic~~drug ~~data~~application (NDA) in Japan for zuranolone for the treatment of MDD. ~~The~~In ~~updated~~the ~~label~~third ~~highlights~~quarter ~~Qelbree’s~~of ~~partial~~2025, ~~agonist~~Biogen ~~activity~~received atapproval for zuranolone for the ~~serotonin~~treatment ~~5-HT2C~~of ~~receptor~~PPD by the European Medicines Agency (EMA) and ~~inhibition~~Medicines ofHealthcare Regulatory Agency (MHRA) in Europe and the ~~norepinephrine~~United ~~transporter~~Kingdom (U.K.) respectively. In the fourth quarter of 2025, ~~reinforcing~~zuranolone ~~its~~received ~~multimodal~~Health ~~pharmacodynamic~~Canada ~~profile~~Authorization in Canada for treatment indicated for adults with PPD. ~~Additionally~~Also in the fourth quarter of 2025, Shionogi received approval for a product containing zuranolone for the ~~updated~~treatment ~~label~~of ~~now~~MDD ~~includes~~by ~~new~~the Pharmaceuticals and Medical Devices Agency in Japan. No product containing zuranolone is approved for the treatment of MDD in the United States.

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lactation data for breastfeeding women with attention-deficit/hyperactivity disorder (ADHD), showing that the transfer of Qelbree into breastmilk is low.

•The Company recently presented interim results from an open-label Phase IV trial with Qelbree in 161 adults with ADHD and mood symptoms at the 30th Annual National Psychopharmacology Update™ conference. The improvements in clinician and patient-rated measures of ADHD, depression and anxiety symptoms in the interim data analysis, analyzed for the first 95 patients who completed the trial, are encouraging and suggest that Qelbree's effects may extend to adults with complex ADHD. Efficacy and safety outcomes were consistent with the double-blind, pivotal trial of Qelbree in adult ADHD. Topline results from the full Phase IV trial (all 161 adults) are consistent with the interim results and will be presented at the American Psychiatric Association Annual Meeting in May 2025.

•Total IQVIA prescriptions for Qelbree were 767,791 for full year 2024, an increase of 25% compared to full year 2023.

•The Company received a two-plus year patent term extension from the US Patent and Trademark Office for US Patent number 9,662,338 that covers Qelbree. This extends the original expiration date of the patent to the year 2035.

Product Pipeline Update

ONAPGO (formerly SPN-830) (apomorphine infusion device) for treatment of Parkinson's disease (PD)

•The Company announced in early February 2025 that the FDA approved ONAPGO (apomorphine hydrochloride), formerly known as SPN-830, as the first and only subcutaneous apomorphine infusion device for the treatment of motor fluctuations in adults with advanced PD. ONAPGO will be launched in the second quarter of 2025 with a support team of experts, including a robust nurse education program, and access support.

SPN-817 – Novel first-in-class highly selective AChE inhibitor for epilepsy

•InThe ~~November 2024, the Company reported topline results from an open label~~ Phase 2a2b ~~study~~randomized, indouble-blind, ~~patients with treatment~~placebo-~~resistant~~controlled ~~seizures. The~~ study ~~suggested~~of ~~a differentiated profile, with strong efficacy in focal seizures at the~~ 3mg toand 4mg twice daily doses. ~~SPN-817~~is ~~was~~ongoing ~~safe and had acceptable tolerability~~ with ~~two~~a ~~subjects~~targeted ~~discontinuing~~enrollment ~~because~~ of ~~treatment~~approximately ~~related~~258 ~~adverse~~adult ~~events~~patients ~~out~~with oftreatment ~~the~~resistant 26focal ~~subjects who entered the maintenance period~~seizures.

•The Company has initiated a Phase 2b randomized, double-blind, placebo-controlled study of 3mg and 4mg twice daily doses with a targeted enrollment of approximately 258 adult patients with treatment resistant focal seizures.

SPN-820 – Novel first-in-class molecule that increases mTORC1 mediated synaptic function for depression

•InThe ~~February 2025, the~~ Company ~~reported~~initiated ~~topline~~a ~~results~~follow-on ~~from~~Phase a2b multi-center, randomized, double-blind, placebo-controlled ~~Phase~~trial 2bin ~~study~~approximately of200 ~~SPN-820 in~~ adults with ~~treatment-resistant depression (TRD)~~MDD. The study ~~did~~will ~~not~~examine ~~demonstrate a statistically significant improvement on~~ the ~~primary~~safety and ~~secondary~~tolerability ~~endpoints. The safety profile~~ of SPN-820 ~~was~~2400 ~~consistent~~mg ~~with~~given ~~previous~~intermittently ~~clinical~~(twice ~~trials,~~weekly) ~~showing~~as ~~few~~an ~~adverse~~adjunctive ~~events.~~treatment ~~The~~to ~~Company~~the ~~will~~current ~~continue~~baseline toantidepressant ~~analyze~~therapy, ~~the~~as ~~data~~well ~~and~~as ~~decide~~assess on the ~~future~~rapid onset of ~~the~~improvement ~~program~~in depressive symptoms.

SPN-443 – Novel stimulant for ~~ADHD~~attention-deficit/~~CNS~~hyperactivity disorder (ADHD)

•The Company ~~completed~~expects to initiate a Phase 1 ~~pharmacokinetic~~single-ascending/multiple-ascending dose study ofin ~~two~~adult ~~oral~~healthy ~~formulations~~volunteers in ~~healthy~~the ~~adults.~~second ~~Both~~half ~~formulations~~ of ~~SPN-443 showed adequate bioavailability and were well tolerated~~2026.

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Critical Accounting Policies and the Use of Estimates

The significant accounting policies and basis of presentation for our consolidated financial statements are described in Part II, Item 8—Financial Statements and Supplementary Data, Note 2, Summary of Significant Accounting Policies, in the Notes to the Consolidated Financial Statements. Our consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP), requiring us to make estimates, judgments, and assumptions that affect the reported amounts of assets, liabilities, revenues, and expenses, and other related disclosures. Some judgments can be subjective and complex, and therefore, actual results could differ materially from those estimates under different assumptions or conditions.

We believe the judgments, estimates, and assumptions associated with the following critical accounting policies have the greatest potential impact on our consolidated financial statements:

•Revenue recognition;

77•Business combination and valuation of acquired assets;

~~Table~~•Valuation of ~~Contents~~contingent consideration;

•Impairment of ~~Indefinite~~definite-~~Lived~~lived ~~Intangible~~intangible ~~Assets; and~~assets

•Impairment of Definite-Lived Intangible Assets

Revenue Recognition

Our principal source of revenue is product sales. Revenue from product sales is recognized when physical control of our products is transferred to our customers, who are primarily pharmaceutical wholesalers, specialty pharmacies, and distributors. Product sales are recorded net of various forms of variable consideration, including: estimated rebates; sales discounts; and an estimated liability for future product returns (collectively, "sales deductions").

The variability in the net transaction price for our products arises primarily from the aforementioned sales deductions. Significant judgment is required in estimating certain sales deductions, including rebates and returns. In making these estimates, we consider: historical experience; product price increases; current contractual arrangements under applicable payor programs; unbilled claims; processing time lags for claims; inventory levels in the wholesale, specialty pharmacy, and retail distribution channel; and product life cycle. We adjust our estimates at the earlier of when the most likely amount of consideration we expect to receive changes, or when the consideration becomes fixed. Variable consideration on product sales is only recognized when it is probable that a significant reversal will not occur. If actual results in the future vary from our estimates, we adjust our estimates in the period identified. These adjustments could materially affect net product sales and earnings in the period in which the adjustment(s) is recorded. Refer to Part II, Item 8—Financial Statements and Supplementary Data, Note 2, Summary of Significant Accounting Policies, in the Notes to the Consolidated Financial Statements, for further discussion on each of the different sales deductions. While sales rebates have been relatively predictable based on historical experience such that there have not been material changes in estimates in prior periods, there have been critical estimates associated with rebates and returns that may result in significant variability as further discussed below.

Returns

We maintain a return policy that allows our customers to return products within a specified period of time. Sales of our products are not subject to a general right of return; however, we will accept return of expired product 6 months prior to, and up to 12twelve months subsequent to, the product's expiry date for certain products. Our products have a shelf life of up to 48 months from date of manufacture. The product return accrual is estimated principally based on historical experience, the level and estimated shelf life of inventory in the distribution channel, changes in the current wholesaler prices, our return policy and expected market events, including generic competition. The time lag from date of sale of our products when we accrue our provision for product returns and the time at which we issue credit for expired product can occur up to several years after the sale of our product. Estimates associated with our provision for product returns are particularly susceptible to adjustment given the extensive time lag. The Company launched Qelbree in May 2021. The Company is actively monitoring returns activity in light of the timeline from the date of sale and the time at which we issue credit for expired products. We had favorable actual returns in 2024 and 2025 for Qelbree and as a result, the Company changed its estimated provision for Qelbree product returns based on the most recent experience. The Company has entered into settlement and license agreements with third parties, permitting the sale of a generic version of Trokendi XR beginning in January 2023. In addition, the Company entered into settlement and license agreements with third parties, permitting the sale of a generic version of Oxtellar XR beginning in September 2024. The Company is actively monitoring returns activity in light of the loss of exclusivity and actual and possible further future sales decline based on timing of generic entry. The entry of a generic competitor may cause our future Trokendi XR and Oxtellar XR product return rates to change from historical trends, and this change could have a material effect on the future provision for product returns.

~~from the date of sale and the time at which we issue credit for expired products. We had favorable actual returns in 2024 for~~89

Qelbree and as a result, the Company changed its estimated provision for Qelbree product returns based on the most recent

experience. The Company has entered into settlement and license agreements with third parties, permitting the sale of a generic version of Trokendi XR beginning in January 2023. In addition, the Company entered into settlement and license agreements with third parties, permitting the sale of a generic version of Oxtellar XR beginning in September 2024. The Company is actively monitoring returns activity in light of the loss of exclusivity and actual and possible further future sales decline based on timing of generic entry. The entry of a generic competitor may cause our future Trokendi XR and Oxtellar XR product return rates to change from historical trends, and this change could have a material effect on the future provision for product returns. Historically, we have experienced changes in estimates in return reserve calculations, but those adjustments have not been material to net earnings. However, given the extensive number of inputs and assumptions, described above, future changes in our return reserves could be material.

Rebates

Rebates are discounts which we pay under either public sector or private sector health care programs. Rebates paid under public sector programs are generally mandated under law, whereas private sector rebates are generally contractually negotiated by us with managed care providers. Both types of rebates vary over time. Rebate amounts are typically based upon the volume of purchases using contractual or statutory prices, which may vary by product and by payer. For each type of rebate, the factors used in the calculations of the accruals for that rebate include the identification of the products subject to the rebate, applicable price terms and estimated lag time between sale and payment of the rebate, which can be significant. In order to establish the rebate accruals, we use both internal and external data to estimate the level of inventory in the distribution channel and the rebate claims processing lag time for each type of rebate. To estimate the rebate percentage or net price, we track sales by product and by customer or payer. We evaluate inventory data reported by wholesalers, available prescription volume information, product pricing, historical experience and other factors in order to determine the adequacy of our accruals. We regularly monitor our

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~~accruals~~Historically, ~~and~~we ~~record~~have ~~adjustments~~experienced ~~when~~changes ~~rebate~~in ~~trends~~estimates in return reserve calculations, ~~rebate~~but ~~programs~~those ~~and~~adjustments ~~contract~~have ~~terms,~~not ~~legislative~~been ~~changes,~~material orto ~~other~~net ~~significant~~earnings ~~events~~(loss). ~~indicate~~Adjustments ~~that~~related ato ~~change~~prior year sales for product returns in ~~reserve~~2025 isand ~~appropriate~~2024 was less than 4% of net product sales for each respective period and was less than 1% of net product sales in 2023. ~~Historically~~However, ~~adjustments~~given tothe ~~rebate~~extensive ~~accruals~~number ~~have~~of ~~not~~inputs ~~been~~and ~~material~~assumptions, todescribed ~~net~~above, ~~earnings~~future changes in our return reserves could be material.

Specifically, a significant portion of rebates we pay are on state Medicaid programs. We participate in state Medicaid programs wherein the lag time from the date of sale of our product when we accrue for provision for rebates and the ultimate invoicing by the individual state Medicaid program can occur up to several quarters after the sale of our product. Because of the time lag for Medicaid, in any particular quarter, our adjustments may incorporate revisions of accruals for prior periods. Estimates associated with our participation in state Medicaid programs are particularly susceptible to adjustment given the extensive time lag. Historically, adjustments to rebate accruals have not been material to net earnings, but there continues to be an extensive time lag related to certain programs that could result in variability in future periods.Rebates

Specifically, a significant portion of rebates we pay are on state Medicaid programs. We participate in state Medicaid programs wherein the lag time from the date of sale of our product when we accrue for provision for rebates and the ultimate invoicing by the individual state Medicaid program can occur up to several quarters after the sale of our product. Because of the time lag for Medicaid, in any particular quarter, our adjustments may incorporate revisions of accruals for prior periods. Estimates associated with our participation in state Medicaid programs are particularly susceptible to adjustment given the extensive time lag. Historically, adjustments to rebate accruals have not been material to net earnings (loss), but there continues to be an extensive time lag related to certain programs that could result in variability in future periods.

For a roll-forward of the accrued sales deductions, see the section entitled Results of Operations - Revenues - Sales deductions and related accruals.

~~Impairment~~Business ofCombinations ~~Indefinite-Lived~~and ~~Intangible~~Valuation of Acquired Assets

InThe ~~2020, the~~ Company ~~acquired~~completed the ~~right~~Sage toAcquisition ~~further~~on ~~develop~~July ~~and commercialize SPN-830 (apomorphine infusion device)~~31, ~~a late-stage product candidate (IPR&D intangible asset)~~2025. The Intransaction ~~Process~~was Research and Development (IPR&D) intangible asset represents the estimate of the fair value of acquired technology which has not yet reached technological feasibility. The primary basis for determining the technological feasibility is obtaining specific regulatory approvals. IPR&D is accounted for as an indefinite-lived intangible asset until completion or abandonment of the IPR&D project. Upon completion of the development project, the IPR&D will be amortized over its estimated useful life. We review intangible assets with indefinite lives for impairment annually or more often if impairment indicators are identified. Our annual evaluation is generally based on an assessment of qualitative factors to determine whether it is more likely than not the fair value of the asset is less than its carrying amount. If the Company is unable to conclude that the indefinite-lived intangible asset is not impaired during its qualitative assessment, the Company will perform a ~~quantitative~~business ~~assessment by estimating the fair value of the indefinite-lived intangible asset and comparing the fair value to the carrying amount~~combination. The significant inputs and assumptions used to estimate the fair value of the IPR&D intangible asset include: the timing and probability of success of clinical and regulatory approvals for the IPR&D asset, the estimated future cash flows from product sales, and the timing and projection of costs and expenses. We believe that the timing and probability of success of clinical and regulatory approval for the IPR&D asset is key and directly drives the timing and realization of the estimated future cashflows from product sales and the incurrence of costs and expenses. The drug regulatory approval process is inherently uncertain, lengthy, and difficult. The FDA has substantial discretion in the drug approval process, including the ability to delay, limit or deny approval of a product candidate for many reasons. In addition, the actual review and approval process time required may vary substantially based upon the type, complexity, and novelty of the product or disease. Any adverse action by the FDA can potentially impact our estimated fair value of the IPR&D intangible asset.

AsThe acquisition method of ~~December~~accounting ~~31,~~requires ~~2024,~~that we ~~considered~~recognize the ~~positive~~assets ~~results~~acquired ofand ~~clinical~~liabilities ~~trials,~~assumed ~~industry~~at ~~benchmarks,~~their ~~available~~acquisition ~~market~~date ~~data,~~fair ~~and~~values. ~~recent~~Goodwill ~~communications~~is ~~with~~measured as the ~~FDA~~excess ~~regarding~~of ~~SPN-830~~consideration intransferred ~~determining~~over the ~~probability~~acquisition ofdate ~~technical~~net ~~and~~fair ~~regulatory~~values ~~success~~of ~~input~~the assets acquired and ~~assumption~~the liabilities assumed. The ~~carrying~~purchase ~~amount~~price ofallocation ~~the~~is ~~indefinite-lived~~a ~~intangible~~critical ~~asset~~accounting ~~was~~policy ~~$124.0~~because ~~million~~the asestimation of ~~December~~fair ~~31,~~values ~~2024.~~of ~~Although~~acquired weassets ~~believe~~and ~~the~~assumed liabilities is judgmental and requires various assumptions,. ~~judgments~~Further, the amounts and ~~estimates~~useful welives ~~have~~assigned ~~used~~to indepreciable ~~our~~and ~~assessments~~amortizable ~~are~~assets ~~reasonable~~versus ~~and~~amounts ~~appropriate~~assigned to goodwill, awhich ~~material~~is ~~change~~not inamortized, ~~any~~can significantly affect the results of ~~our~~operations ~~assumptions~~in orthe ~~external~~period ~~factors~~of ~~could~~and ~~have~~for ~~lead~~periods subsequent to ~~impairment~~a ~~charges~~business combination.

Fair Invalue ~~February~~is ~~2025~~the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction, ~~ONAPGO~~and ~~(apomorphine~~therefore ~~hydrochloride)~~represents ~~injection~~an exit price. When identifiable intangible assets, ~~formerly~~are ~~known~~acquired, we determine the fair values of the assets as ~~SPN-830~~of the acquisition date. An income approach, ~~was~~which ~~approved~~generally byrelies upon projected cash flow models, is used in estimating the ~~FDA~~fair asvalue of the ~~first~~acquired intangible assets. These cash flow projections are based on management's estimates of economic and ~~only~~market ~~subcutaneous~~conditions ~~apomorphine~~including: ~~infusion~~the ~~device~~estimated ~~for~~future cash flows from revenues of acquired assets; the ~~treatment~~timing and projection of ~~motor~~costs ~~fluctuations~~and inexpenses, ~~adults~~discount ~~with~~rates; ~~advanced~~and ~~PD.~~tax rates.

While we use our best estimates and assumptions as part of the process to value assets acquired and liabilities assumed at the acquisition date, our estimates are inherently uncertain and subject to refinement. During the measurement period, which occurs before finalization of the purchase price allocation, changes in assumptions and estimates that result in adjustments to the fair values of assets acquired and liabilities assumed, if based on facts and circumstances existing at the acquisition date, are recorded on a retroactive basis as of the acquisition date, with the corresponding offset to goodwill. Any adjustments not based on facts and circumstances existing at the acquisition date, or if subsequent to the conclusion of the measurement period, will be recorded to our consolidated statements of earnings.

Refer to Note 3, Sage Acquisition, for further information.

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Valuation of Contingent Consideration

We record contingent consideration resulting from a business combination at its fair value on the acquisition date. During the measurement period, if we obtain new information regarding facts and circumstances that existed as of the Sage Acquisition Closing Date that, if known, would have resulted in revised estimates of fair values of acquired assets, assumed liabilities or contingent consideration, the Company will accordingly revise its estimates of fair values and purchase price allocation. In addition, on a quarterly basis, we will revalue the contingent consideration liability and record increases or decreases in their fair value as an adjustment to operating earnings. The determination of the initial and subsequent value of the contingent consideration liability requires significant judgment by management. Changes in any of the inputs not related to facts and circumstances existing as of the acquisition date may result in a significant fair value adjustment, which can impact the results of operations in the period in which the adjustment is made.

As of December 31, 2025 and December 31, 2024 the Company reported contingent consideration liability of $31.3 million and $47.3 million, respectively, in its consolidated balance sheets related to the Sage Acquisition, USWM Acquisition, and Adamas Acquisition. There was no contingent consideration liability related to the USWM Acquisition and Adamas Acquisition as of December 31, 2025.

The Sage contingent consideration liability was $11.4 million as of the Sage acquisition date, and $31.3 million as of December 31, 2025. The contingent consideration is primarily associated with the fair value of the regulatory and commercial milestone and the sales-based milestones contingent consideration payments. The contingent consideration is related to one non-tradable contingent value right (CVR) which represents the contractual right to receive a contingent payment upon the achievement of the applicable regulatory and commercial milestone and sales-based milestones. The estimated fair value of the contingent consideration was determined using the Monte Carlo simulation. The key assumptions considered in estimating the fair value includes the estimated probability and timing of milestone achievement, such as the probability and timing of obtaining regulatory approval and first commercial sale in Japan, the estimated amount and timing of projected revenues, volatility, estimated discount rates and risk-free interest rate. The drug regulatory approval process is inherently uncertain, and any adverse action taken by the Pharmaceuticals and Medical Devices Agency in Japan can potentially impact our estimated fair value of the regulatory and commercial activities milestone. The possible outcomes for the contingent consideration range from $0 to $234 million on an undiscounted basis. Refer to Note 3, Sage Acquisition, and Note 7, Contingent Consideration, for further information. Subsequent to the Sage Acquisition, in December 2025, Shionogi, the Company's collaboration business partner, announced that it obtained manufacturing and marketing approval in Japan for ZURZUVAE® Capsules 30 mg for the indication of depression and depressive state. As a result, the Company's contingent consideration liability increased as of December 31, 2025.

Impairment of Definite-Lived Intangible Assets

Management assesses the potential impairment of our finite-lived intangibles whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The carrying amount of the definite-lived intangible assets, net was $~~397~~569.95 million as of December 31, ~~2024~~2025. Changes that could prompt such an assessment may include significant or adverse changes in the legal and regulatory environment, the introduction or advancement of competitive products and product candidates, changes in market demand, declining revenue and/or other events that indicate it is more likely than not that fair value is less than its carrying value. If a review of the definite-lived intangibles indicates that the carrying value of certain of these assets is more than the estimated undiscounted future cash flows, an impairment charge is made, as required, to adjust the carrying value to the estimated fair value. Evaluating for impairment requires judgment, including evaluating current economic and competitive circumstances, estimating future cash flows, future growth rates and future profitability. The primary inputs and assumptions used in the model included timing and projections of estimated future revenues and cash flows, loss of exclusivity, and discount rate. If the carrying amount of the asset exceeds its fair value, the Company writes down the asset to its estimated fair value, and an impairment loss equal to the difference between the assets fair value and carrying value is recognized in the consolidated statement of earnings (loss) in the period at which such determination is made. The use of different assumptions could increase or decrease the estimated fair value of assets and could therefore affect any impairment measurement. The Company recognized impairment charges of $20.2 million in 2023 mainly due to the partial write-off of the carrying value of some of its acquired intangible assets, primarily XADAGO. The primary factors that led to the impairment determinations were the following: (1) the performance of the commercial products; (2) forthcoming loss of exclusivity of XADAGO in December 2027, or earlier under certain circumstances, due to settlement agreements with third party generic companies; and (3) the change in the Company's future outlook of the brands.

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fair value, and an impairment loss equal to the difference between the assets fair value and carrying value is recognized in the consolidated statement of earnings in the period at which such determination is made. The use of different assumptions could increase or decrease the estimated fair value of assets and could therefore affect any impairment measurement. The Company recognized impairment charges of $20.2 million in 2023 mainly due to the partial write-off of the carrying value of some of its acquired intangible assets, primarily XADAGO. The primary factors that led to the impairment determinations were the following: (1) the performance of the commercial products; (2) forthcoming loss of exclusivity of XADAGO in December 2027, or earlier under certain circumstances, due to settlement agreements with third party generic companies; and (3) the change in the Company's future outlook of the brands.

Results of Operations

In this section, we discuss the results of our operations for the year ended December 31, ~~2024~~2025, compared to the year ended December 31, ~~2023~~2024. Our Annual Report on Form 10-K for the year ended December 31, ~~2023~~2024, includes a discussion and analysis of our financial condition and results of operations for the year ended December 31, ~~2022~~2023, in Part II, Item 7—Management's Discussion and Analysis of Financial Condition and Results of Operations.

Revenues

Revenues consist primarily of net product sales of our commercial products in the U.S., supplemented by royalty and licensing revenues from our collaborative licensing arrangements. The following table provides information regarding our revenues during the years ended December 31, 2025 and 2024 (dollars in thousands):

	Year Ended December 31,				Change
	2024		2023		Amount		Percent
	2025		2024		Amount		Percent
Net product sales
Qelbree	$	~~241~~304,~~273~~654	$	~~140~~241,~~192~~273	$	~~101~~63,~~081~~381	7226	%
GOCOVRI	~~130~~146,824		~~119~~130,~~637~~824		1116,~~187~~000		912	%
Oxtellar XR	9940,~~464~~700		~~113~~99,~~404~~464		(1358,~~940~~764)		(1259)	%
APOKYN	7347,~~926~~771		7573,~~083~~926		(126,~~157~~155)		(235)	%
Trokendi XR	6342,~~201~~421		9463,~~336~~201		(3120,~~135~~780)		(33)	%
Other(1)	29,008		31,281		(2,273)		(7)	%
ONAPGO	17,254		—		17,254		100	%
Total net product sales	$	637,696	$	573,933	$	63,763	11	%
Other(1)	26,912		29,008		(2,096)		(7)	%
Royalty, licensing and other revenues	24,121		33,588		(9,467)		(28)	%
Total net product sales	$	626,536	$	637,696	$	(11,160)	(2)	%
Total revenues	$	661,817	$	607,521	$	54,296	9	%
Collaboration revenue (ZURZUVAE)	52,996		—		52,996		100	%
Royalty, licensing, and other revenues	39,420		24,121		15,299		63	%
Total revenues	$	718,952	$	661,817	$	57,135	9	%

______________________________

(1) Includes net product sales of MYOBLOC, XADAGO and Osmolex ER.

Net Product Sales

Net product sales ~~increased~~decreased by $6311.82 million from $~~573~~637.97 million in ~~2023~~2024 to $~~637~~626.75 million in ~~2024~~2025. The ~~increase~~decrease was primarily due to ~~increases~~the decline in net product sales ~~from~~of ~~Qelbree~~APOKYN ~~and~~due ~~GOCOVRI~~to ~~partially~~lower ~~offset~~volume, byand ~~the~~ decline in net product sales of ~~Trokendi~~Oxtellar XR and ~~Oxtellar~~Trokendi XR due to generic erosion, partially offset by the increases in net product sales from Qelbree and GOCOVRI due to higher volume and higher price, and ONAPGO, which was launched in the second quarter of 2025.

On November 4, 2025, we announced that due to stronger than expected demand for ONAPGO, supplier constraints are impacting our ability to fully meet this demand. ONAPGO is manufactured in Europe, supplied to us by our ONAPGO licensing partner, and packaged in the U.S. by a third-party contract manufacturing organization. We currently rely on single source suppliers to produce and package final dosage forms for ONAPGO. On February 24, 2026, we announced that we have made progress in securing additional product supply of ONAPGO from the current supplier and as a result, has resumed new patient initiation. In addition, we are working with a second supplier that is expected to begin supplying ONAPGO in 2027. A change in any of the suppliers would require regulatory approval which could cause a further delay in manufacturing and a possible loss of sales, which could affect future operating results adversely.

Sales Deductions and Related Accruals

We record accrued product returns and accrued product rebates as current liabilities in Accrued product returns and rebates, on our consolidated balance sheets. We record sales discounts as a reduction against Accounts receivable, net on the consolidated balance sheets. Both amounts are generally affected by changes in gross product sales, changes in the provision for net product sales deductions, and the timing of payments/credits.

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The following table provides a summary of activities with respect to accrued product returns and rebates and sales discounts for the years ended December 31, 2025 and 2024 (dollars in thousands):

	Accrued Product Returns and Rebates
	ProductReturns		ProductRebates		Sales Discounts		Total
Balance at December 31, 2024	$	53,375	$	115,330	$	12,347	$	181,052
Provision related to:
Current year sales	10,563		433,223		72,982		516,768
Prior year sales	(20,727)		(389)		40		(21,076)
Total provision	(10,164)		432,834		73,022		495,692
Less: Actual payments/credits	(5,411)		(424,867)		(71,892)		(502,170)
Balance at December 31, 2025	$	37,800	$	123,297	$	13,477	$	174,574
Balance at December 31, 2023	$	57,290	$	96,984	$	10,719	$	164,993
Provision
Provision related to:
Provision for current year sales	17,677		389,842		69,589		477,108
Current year sales	17,677		389,842		69,589		477,108
Adjustments relating to prior year sales	(11,943)		(2,049)		(42)		(14,034)
Prior year sales	(11,943)		(2,049)		(42)		(14,034)
Total provision	5,734		387,793		69,547		463,074
Less: Actual payments/credits	(9,649)		(369,447)		(67,919)		(447,015)
Balance at December 31, 2024	$	53,375	$	115,330	$	12,347	$	181,052
Balance at December 31, 2022	$	45,008	$	106,657	$	12,995	$	164,660
Provision
Provision for current year sales	22,928		406,329		65,896		495,153
Adjustments relating to prior year sales	(213)		1,672		31		1,490
Total provision	22,715		408,001		65,927		496,643
Less: Actual payments/credits	(10,433)		(417,674)		(68,203)		(496,310)
Balance at December 31, 2023	$	57,290	$	96,984	$	10,719	$	164,993

Accrued Product Returns and Rebates

The accrued product returns balance decreased from $5753.34 million as of December 31, ~~2023~~2024 to $5337.48 million as of December 31, ~~2024~~2025. This decrease was primarily due to a decrease of $1120.9 7 million of ~~adjustments in the~~ estimated provision for product returns related to prior year sales. ~~offset~~The bymajority ~~higher~~of ~~net~~the ~~product~~provision ~~sales~~for ~~and~~product ~~timing~~returns of related ~~return~~to ~~activity.~~prior ~~The~~year ~~majority~~sales ~~of the adjustment~~ is attributable to Qelbree, reflecting continued favorable actual returns experienced in ~~2024~~2025. As a result, the Company changed its estimated provision for product returns based on the most recent experience.

The accrued product rebates balance increased from $97115.03 million as of December 31, ~~2023~~2024 to $~~115~~123.3 million as of December 31, ~~2024~~2025 due to timing of payments associated with government programs.

Provision for Product Returns and Rebates

The provision for product returns decreased from $225.7 million in ~~2023~~2024 to $5(10.72) million in ~~2024~~2025. The decrease was primarily due to the aforementioned $1120.9 7 million of ~~adjustments~~favorable adjustment in the estimated provision for product returns related to prior year sales.

The provision for product rebates ~~decreased~~increased from $~~408~~387.08 million in ~~2023~~2024 to $~~387~~432.8 million in ~~2024~~2025. The ~~decrease~~increase was primarily attributable to ~~lower~~higher ~~Trokendi~~Qelbree XR sales and ~~favorability~~unfavorability in ~~commercial~~government programs, ~~partially~~as ~~offset~~a byresult ~~higher~~of ~~Qelbree~~product ~~gross~~price ~~sales.~~increases in the first quarter of 2025.

Sales Discounts

The provision for sales discounts increased from $6569.95 million in ~~2023~~2024 to $6973.50 million in ~~2024~~2025 primarily attributable to ~~higher~~new ~~net~~ product launched in 2025 and higher Qelbree sales in ~~2024~~2025 compared to ~~2023~~2024.

Adjustments related to prior year sales

Adjustments related to prior year sales in ~~2024~~2025 of $1421.01 million was ~~less~~approximately ~~than 3~~4% of both net product sales and total provision for the year ended December 31, ~~2024~~2025. ~~As aforementioned, the majority of this adjustment is attributable to Qelbree, reflecting favorable actual returns experienced in 2024 for Qelbree.~~ Adjustments related to prior year sales in ~~2023~~2024 of $114.50 million was less than 13% of both net product sales and total provision for the year ended December 31, ~~2023~~2024. As aforementioned, the majority of this adjustment is attributable to Qelbree, reflecting favorable actual returns experienced in 2025 and 2024.

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Collaboration Revenue (ZURZUVAE)

Collaboration revenue (ZURZUVAE) was $53.0 million for the year ended December 31, 2025. The increase was due to the Sage Acquisition in July 2025.

Royalty, Licensing and Other Revenues

Royalty, licensing and other revenues ~~decreased~~increased by $915.53 million from $3324.61 million in ~~2023~~2024 to $2439.14 million in ~~2024~~2025, primarily due to ~~lower~~an ~~royalties~~increase onin ~~generic~~licensing ~~Trokendi~~revenues XRrelated ~~due~~ to the ~~increased~~achievement ~~number~~ of ~~generic~~a ~~entrants~~regulatory milestone under our collaboration agreement with Shionogi. The royalty term for Orenitram is expected to cease in 2027 which may result in a future decrease to royalty revenues.

Cost of ~~Goods Sold~~Revenues

The following table provides information regarding our cost of revenues for the years indicated (dollars in thousands):

	Year Ended December 31,				Change
	2024		2023		Amount		Percent
	2025		2024		Amount		Percent
Cost of goods sold	$	77,906	$	83,779	$	(5,873)	(7)%
Cost of revenues	$	74,562	$	77,906	$	(3,344)	(4)%

Cost of ~~goods~~revenues ~~sold~~ includes the cost of royalties; cost of materials, including active pharmaceutical ingredients (API); and cost to manufacture, including tableting, packaging, personnel, overhead, stability testing, and distribution. Cost of revenues also includes our proportionate share of ZURZUVAE manufacturing costs under the Biogen Collaboration Agreement.

Cost of ~~goods~~revenues ~~sold~~ decreased from $8377.89 million in ~~2023~~2024 to $7774.96 million in ~~2024~~2025. The decrease was primarily driven by ~~manufacturing~~lower ~~efficiencies~~APOKYN ofroyalties ~~Qelbree~~due to lower sales and ~~the~~decrease ~~decline~~in Oxtellar XR sales due to generic erosion, primarily offset by increases in ~~net~~cost ~~product~~of revenues from Qelbree due to higher sales, increase in cost of ~~Trokendi~~revenues XRfrom ONAPGO, which was launched in the second quarter of 2025, and ~~Oxtellar~~increase XRin ~~due~~manufacturing costs related to ~~generic~~ZURZUVAE ~~erosion~~under the Biogen Collaboration Agreement from the acquisition of Sage in July 2025.

Research and Development Expense

The following table provides information regarding our ~~research~~Research and development (R&D) expenses for the years indicated (dollars in thousands):

	Year Ended December 31,				Change
	2024		2023		Amount		Percent
	2025		2024		Amount		Percent
Research and development	$	~~108~~106,~~796~~235	$	91108,~~593~~796	$	17(2,~~203~~561)	19(2)%

R&D expenses ~~increased~~decreased from $91108.68 million in ~~2023~~2024 to $~~108~~106.82 million in ~~2024~~2025. The ~~increase~~decrease was primarily due to ~~increased~~decreased clinical program costs on SPN-~~817~~820, partially offset by the increase in clinical program costs on SPN-~~820,~~817 and the ~~open-label~~Company's ~~study~~share of ~~Qelbree,~~R&D ~~and~~expenses ~~increased~~from ~~manufacturing~~the ~~costs~~collaboration arrangement with Biogen. The Company acquired a collaboration agreement with Biogen as part of ~~our~~the ~~product~~acquisition ~~candidates~~of Sage in July 2025.

Selling, General, and Administrative Expense

The table below provides information regarding our Selling, general, and administrative (SG&A) expenses for the years indicated (dollars in thousands):

Year Ended December 31,

Change

2024

2023

Amount

Percent

2025

2024

Amount

Percent

Selling and marketing expense

~~227~~288,~~293~~651

~~229~~227,~~186~~293

(161,~~893)~~358

~~(1)~~27%

General and administrative expense

94196,~~289~~912

~~107~~94,~~175~~289

~~(12~~102,~~886)~~623

~~(12)~~109%

Total

~~321~~485,~~582~~563

~~336~~321,~~361~~582

~~(14~~163,~~779)~~981

~~(4)~~51%

Selling, ~~general,~~ and ~~administrative~~marketing expenses ~~decreased~~increased from $~~336~~227.43 million in ~~2023~~2024 to $~~321~~288.67 million in ~~2024~~2025. ~~During~~The ~~the~~increase ~~year~~was ~~ended~~primarily ~~December~~due ~~31,~~to ~~2024,~~higher ~~the~~professional ~~Company~~and ~~recorded~~consulting ~~approximately~~expenses, ~~$14.2 million~~higher ofemployee-related ~~insurance~~expenses ~~recoveries~~due ~~for~~to ~~certain~~an ~~legal~~increase ~~costs.~~in ~~Legal~~headcount ~~costs~~because ~~were~~of ~~recorded~~the ~~under~~acquisition ~~general~~of ~~and~~Sage, ~~administrative~~higher marketing expense asrelated ~~incurred.~~to ~~Correspondingly~~ONAPGO, ~~the~~which ~~insurance~~was ~~recoveries~~launched ~~were~~in ~~recorded~~second asquarter aof ~~reduction~~2025, toand ~~general~~the ~~and~~Company's ~~administrative~~share of commercial expenses. ~~There~~from ~~were~~the nocollaboration ~~insurance~~arrangement ~~recoveries~~with ~~recorded~~Biogen in ~~2023~~2025.

~~Amortization of Intangible Assets~~94

	Year Ended December 31,				Change
	2024		2023		Amount		Percent
Amortization of intangible assets	$	77,977	$	82,385	$	(4,408)	(5)%

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~~Amortization~~General ofand ~~intangible~~administrative ~~decreased~~expenses increased from $8294.43 million in ~~2023~~2024 to $78196.09 million in ~~2024~~2025. The ~~decrease~~increase iswas primarily due to ~~impairment~~the ~~charges~~acquisition-related oncosts ~~certain~~associated ~~acquired~~with ~~intangible~~the ~~assets~~acquisition of Sage in ~~the~~July ~~fourth~~2025. ~~quarter~~The ofone-time ~~2023~~acquisition-related ~~which~~costs ~~reduced~~consist ~~amortization~~primarily ~~expense~~of intransaction ~~fiscal~~costs ~~year~~of ~~2024~~$10.0 million, aspost-combination ~~well~~employee-related asexpenses onof ~~Oxtellar~~$38.3 XRmillion, ~~which~~and ~~was~~post-combination ~~fully~~share-based ~~amortized~~compensation asexpense of ~~September~~$25.0 million ~~2024~~associated ~~and~~with ~~therefore,~~the noacceleration ~~further~~of ~~amortization~~the ~~expense~~vesting ~~was~~of ~~recognized~~certain Sage's equity awards under the terms of the Merger Agreement and change in value of contingent value rights of the portion of potential CVR payments to former Sage employees which are considered probable under the employee compensation accounting model as of the fourth quarter of ~~2024~~2025.

~~Intangible~~Amortization ~~Asset~~of ~~Impairment~~Intangible ~~Charges~~Assets

The following table provides information regarding the amortization expense for intangible assets during the periods indicated (dollars in thousands):

The following table provides information regarding the intangible asset impairment charges during the periods indicated (dollars in thousands):



	Year Ended December 31,				Change
	2025		2024		Amount		Percent
Amortization of intangible assets	$	89,456	$	77,977	$	11,479	15%

	Year Ended December 31,				Change
	2024		2023		Amount		Percent
Intangible asset impairment charges	$	—	$	20,189	$	(20,189)	(100)%

Amortization of intangible assets increased from $78.0 million in 2024 to $89.5 million in 2025. The increase is primarily due to ONAPGO and ZURZUVAE intangible assets amortization expense in 2025 offset by amortization expense in 2024 for Oxtellar XR and Namzaric intangible assets, which were fully amortized in 2024. Prior to the FDA approval of ONAPGO in February 2024, ONAPGO was previously accounted for as an indefinite-lived intangible asset not subject to amortization. ZURZUVAE intangible asset was acquired as part of the Sage Acquisition in July 2025.

InContingent ~~the~~Consideration ~~fourth~~Loss quarter of 2023, the Company recognized impairment charges of $20.2 million mainly due to the partial write-off of the carrying value of some of its acquired intangible assets, primarily XADAGO. The primary factors that led to the impairment determinations were the following: (1Gain) the performance of the commercial products; (2) forthcoming loss of exclusivity of XADAGO; and (3) the change in the Company's future outlook of the brands. No impairment of intangible assets was recognized during the year ended December 31, 2024.

The following table provides information regarding the Contingent consideration loss (gain) during the periods indicated (dollars in thousands):

Contingent Consideration Gain



	Year Ended December 31,				Change
	2025		2024		Amount		Percent
Contingent consideration loss (gain)	$	25,419	$	(6,110)	$	31,529	(516)%

	Year Ended December 31,				Change
	2024		2023		Amount		Percent
Contingent consideration gain	$	(6,110)	$	(1,517)	$	(4,593)	303%

Contingent consideration was a loss of $25.4 million for the year ended December 31, 2025, and a gain of $6.1 million for the year ended December 31, 2024, respectively. The change was primarily due to an increase in fair value of the Sage contingent consideration associated with the regulatory and commercial milestone with the approval of ZURZUVAE for the treatment of MDD in Japan in December 2025, and the accretion of the USWM contingent consideration liabilities to the full milestone payment amounts with the approval of ONAPGO by the FDA in February 2025.

Contingent consideration was a gain for the years ended December 31, 2024 and December 31, 2023 of $6.1 million and $1.5 million, respectively. The change of $4.6 million was primarily driven by the non achievement of the 2024 sales-based milestone associated with the Adamas Acquisition.

Other Income (Expense)

The following table provides the components of other income (expense) during the years indicated (dollars in thousands):

	Year Ended December 31,				Change
	2024		2023		Amount		Percent
	2025		2024		Amount		Percent
Interest income & other income, net	$	16,204	$	10,453	$	5,751	55%
Interest and other income, net	$	13,253	$	16,204	$	(2,951)	(18)%
Interest expense	—		(1,321)		1,321		(100)%
Total	$	13,253	$	16,204	$	(2,951)	(18)%
Noncash interest expense on nonrecourse liability related to sale of future royalties	—		(562)		562		(100)%
Noncash interest expense on debt	—		(532)		532		(100)%
Total	$	16,204	$	8,038	$	8,166	102%

~~Other~~Interest ~~income~~and ~~(expense)~~other ~~was~~income, annet ~~income~~decreased ofto $1613.23 million in ~~2024~~2025 ~~compared~~from ~~to an income of~~ $816.02 million in ~~2023~~2024. The ~~increase~~decrease was due to ~~higher~~lower interest income on marketable securities largely driven by ansale ~~overall~~of ~~higher~~marketable ~~investment~~securities ~~balance~~holdings inof ~~2024~~which ~~and~~the noproceeds ~~debt~~were ~~outstanding~~used into ~~2024.~~partially ~~The~~fund ~~interest expense recognized in 2023 was related to~~ the ~~2023~~Sage ~~Notes~~Acquisition ~~which were paid off~~ in ~~April~~July ~~2023~~2025.

8395

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Income Tax Expense (Benefit)

The following table provides information regarding our income tax expense (benefit) during the periods indicated (dollars in thousands):

	Year Ended December 31,						Change
	2024			2023			Dollar		Percent
	2025			2024			Dollar		Percent
Income tax expense	$	24,005		$	1,453		$	22,552	**
Income tax expense (benefit)	$	(10,480)		$	24,005		$	(34,485)	(144)%
Effective tax rate	2521		%	5325		%

~~______________________________~~Income tax expense (benefit) was a benefit of $10.5 million and expense of $24.0 million for the years ended December 31, 2025 and December 31, 2024, respectively. The 2025 income tax benefit is primarily driven by pre-tax book loss as compared to prior year. The effective tax rate is impacted by the favorable effect of state taxes and the research and development credit, which is offset by the effect of expenses related to current and prior year transactions that are not deductible for tax purposes. Included within transaction costs are payments to former employees of Sage which are not deductible for tax purposes.

**Net ~~Indicates~~Earnings ~~calculation result is equal to or greater than 100%~~(Loss)

The following table provides information regarding our Net earnings (loss) during the periods indicated (dollars in thousands):

Income tax expense was $24.0 million and $1.5 million for the years ended December 31, 2024 and December 31, 2023, respectively. The 2024 income tax expense is primarily driven by an increase in pre-tax book income as compared to prior year. The effective tax rate is impacted by benefits from research and development credits and capital losses that were mostly offset by an increase in the deferred tax asset valuation allowance for net operating losses and investments during the year. The 2023 income tax expense and effective tax rate was primarily driven by near break even pre-tax book income.


	Year Ended December 31,				Change
	2025		2024		Amount		Percent
Net earnings (loss)	$	(38,550)	$	73,865	$	(112,415)	(152)%

The decrease in Net ~~Earnings~~earnings (loss) was primarily due to higher amortization of intangible assets, higher selling, general, and administrative expenses, and higher contingent consideration loss as a result of the acquisition of Sage in 2025, offset by higher revenues.

	Year Ended December 31,				Change
	2024		2023		Amount		Percent
Net earnings	$	73,865	$	1,316	$	72,549	5,513%

The increase in net earnings was primarily due to the higher revenues in 2024 from Qelbree and GOCOVRI and lower total costs and expenses in 2024, as well as no intangible asset impairment charge in fiscal year 2024.

Financial Condition, Liquidity and Capital Resources

Summary of Cash Flows

The following table summarizes the major sources and uses of cash for the periods set forth below (dollars in thousands):

	Year Ended December 31,				Change
	2024		2023		Amount
	2025		2024		Amount
Net cash provided by (used in):
Operating activities	$	~~171~~47,~~951~~331	$	~~111~~171,~~085~~951	$	60(124,~~866~~620)
Investing activities	~~(189~~4,~~867)~~106		~~268~~(189,~~729~~867)		~~(458~~193,~~596)~~973
Financing activities	129,~~193~~130		~~(397~~12,~~880)~~193		~~410~~(3,~~073~~063)
Net change in cash and cash equivalents	$	(5,723)	$	(18,066)	$	12,343
Net change in cash, cash equivalents, and restricted cash	$	60,567	$	(5,723)	$	66,290

Operating Activities

Net cash provided by operating activities was $~~172~~47.03 million in ~~2024~~2025 compared to $~~111~~172.10 million in ~~2023~~2024. The ~~increase~~decrease in cash flows provided by operating activities was primarily due to ~~higher~~the decrease in net ~~income~~earnings for the year ended December 31, ~~2024~~2025 ~~compared~~as towell as changes in working capital. The Company reported a net loss of $38.6 million and net earnings of $73.9 million for the ~~same~~years ~~period~~ended inDecember 31, ~~prior~~2025 ~~year~~and December 31, 2024, respectively. The decline in earnings is principally due to higher costs and ~~changes~~expense in ~~working~~2025 ~~capital~~primarily ~~which~~due ~~reflects~~to the ~~timing~~Sage ~~impacts~~Acquisition ofin ~~cash~~July ~~collections~~2025. onThe ~~receivables~~Company ~~and~~recorded ~~settlement~~$72.9 ofmillion ~~payables~~acquisition-related costs in 2025.

Investing Activities

Net cash ~~used~~provided inby investing activities was $~~189~~4.91 million in ~~2024~~2025 compared to $~~268~~189.79 million ~~provided~~used byin investing activities in ~~2023~~2024. The change was primarily due to ~~an increase in cash outflows from purchases of marketable securities, partially offset by higher cash inflows from~~ the ~~maturities of marketable securities. In 2023, proceeds from the maturities of investments in marketable securities were used to pay off the 2023 Notes.~~ following:

~~Financing Activities~~96

Net cash provided by financing activities was $12.2 million in 2024 compared to $397.9 million used in the same period in 2023. The change was primarily due to the payment of the total principal amounts and remaining outstanding interest due on

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~~the~~•Net ~~0.625%~~cash ~~Convertible~~inflows ~~Senior~~from ~~Notes~~marketable insecurities ~~April~~activity ~~2023,~~were ~~partially~~higher ~~offset~~in by2025 ancompared ~~increase~~to the same period in ~~proceeds~~2024 ~~from~~due ~~issuance~~to maturities of ~~common~~the ~~stock~~marketable securities, whereby the proceeds were used to fund the Sage Acquisition in ~~2024.~~2025 offset by

•Cash, ~~Cash~~outflows ~~Equivalents~~related ~~and~~to ~~Marketable~~the ~~Securities~~Sage Acquisition in 2025 (net of cash acquired) of $293.1 million.

	December 31, 2024		December 31, 2023
Cash and cash equivalents	$	69,331	$	75,054
Marketable securities	384,281		179,820
Long-term marketable securities	—		16,617
Total	$	453,612	$	271,491

Net cash used in investing activities in 2024 was primarily due to purchases of marketable securities, partially offset by higher cash inflows from the maturities of marketable securities.

WeFinancing have financed our operations primarily with cash generated from product sales, supplemented by revenues from royalty and licensing arrangements, as well as proceeds from the sale of equity and debt securities. Continued cash generation is highly dependent on the success of our commercial products, as well as the success of our product candidates if approved by the FDA. While we expect continued profitability in future years, we anticipate there may be significant variability from year to year in the level of our profits particularly due to continued market and payor pressures for our commercial products; the unfavorable impact of the loss of patent exclusivity for Trokendi XR in January 2023 and Oxtellar XR in September 2024; the potential unfavorable impact of the forthcoming loss of exclusivity of XADAGO; funding for research and development of our product candidates; and the additional funding to launch ONAPGO (apomorphine hydrochloride) injection, formerly known as SPN-830, which was approved by the FDA in February 2025. ONAPGO will be launched in the second quarter of 2025.Activities

~~The~~Net ~~Company~~cash ~~believes~~provided ~~its~~by ~~balances~~financing ofactivities ~~cash,~~was ~~cash~~$9.1 ~~equivalents~~million ~~and~~in ~~unrestricted~~2025 ~~marketable~~compared ~~securities,~~to ~~which totaled~~ $~~453~~12.62 million asprovided ofin ~~December 31,~~the same period in 2024,. ~~along~~The ~~with~~change ~~cash~~was ~~generated~~primarily ~~from~~due ~~ongoing~~to ~~operations~~the ~~and~~payment ~~continued~~of ~~access~~the toUSWM ~~debt~~contingent ~~markets~~consideration milestones, ~~will~~offset beby ~~sufficient~~higher toproceeds ~~satisfy~~from ~~its~~the ~~cash~~issuances ~~requirements~~of ~~over~~common ~~the~~stock ~~next~~in ~~twelve~~2025 ~~months~~due ~~and~~to ~~beyond.~~exercising of stock options.

Cash, Cash Equivalents, Marketable Securities, and Restricted Cash

Cash and cash equivalents, marketable securities, and restricted cash are comprised of the following (dollars in thousands):


	December 31, 2025		December 31, 2024
Cash and cash equivalents	$	128,448	$	69,331
Marketable securities	180,222		384,281
Restricted cash	1,450		—
Total	$	310,120	$	453,612

We have financed our operations primarily with cash generated from product sales, supplemented by revenues from royalty and licensing arrangements, as well as proceeds from the sale of equity and debt securities. Continued cash generation is highly dependent on the success of our commercial products, as well as the success of our product candidates if approved by the FDA. While we expect continued profitability in future years, we anticipate there may be significant variability from year to year in the level of our profits particularly due to continued market and payor pressures for our commercial products; the unfavorable impact of the loss of patent exclusivity for Trokendi XR in January 2023 and Oxtellar XR in September 2024; the potential unfavorable impact of the forthcoming loss of exclusivity of XADAGO; funding for research and development of our product candidates; the additional funding for the launch of ONAPGO, which was approved by the FDA in February 2025 and launched in April 2025, and the additional funding for the marketing of ZURZUVAE which was acquired as part of the Sage Acquisition in July 2025. Our marketable securities were lower in 2025 than during 2024 as a portion of the marketable securities we held were sold to fund the Sage Acquisition.

The Company believes its balances of cash, cash equivalents and unrestricted marketable securities, which totaled $308.7 million as of December 31, 2025, along with cash generated from ongoing operations and continued access to debt markets, will be sufficient to satisfy its cash requirements over the next twelve months and beyond.

We may, from time to time, consider raising additional capital through: new collaborative arrangements; strategic alliances; additional equity and/or debt financings; or financing from other sources, especially in conjunction with opportunistic business development initiatives. We will continue to actively manage our capital structure and to consider all financing opportunities that could strengthen our long-term financial profile. Any such capital raises may or may not be similar to transactions in which we have engaged in the past. There can be no assurance that any such financing opportunities will be available on acceptable terms, if at all.

Material Cash Requirements

Our material cash requirements include the following contractual and other obligations.

Leases

Our operating lease commitments include leases of fleet vehicles, leases of certain facilities, including the lease of the current headquarters office and laboratory space. As of December 31, ~~2024~~2025, we have fixed lease payment obligations of $4047.0 ~~million, with $8.2 million payable within twelve months. Refer to Note 12, Leases in the Notes to the Consolidated Financial Statements in Part II, Item 8 of this report.~~

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million, with $12.4 million payable within twelve months. Refer to Note 13, Leases in the Notes to the Consolidated Financial Statements in Part II, Item 8 of this report.

Manufacturing Purchase Obligations

In October 2021, we entered into an amendment to the Merz Agreement which increased the price of the annual purchase commitment of MYOBLOC from €3.0 million to approximately €3.9 million. An amendment to the contract manufacturing agreement with Merz was executed in July 2025. Amendments to the contract manufacturing agreement in July 2025 included, among other things, the removal of the annual minimum purchase requirement of MYOBLOC, and the Company's agreement to pay a nonrefundable annual fee of €3.0 million to cover general maintenance and reservation costs for the manufacturing facilities. For further discussion on the embedded operating lease related to the Merz Agreement, refer to Note 1213, Leases in the Notes to the Consolidated Financial Statements in Part II, Item 8 of this report.

Milestone Payment Obligations from Acquisitions

~~The~~As ~~Company~~of ~~has~~December 31, 2025, no amounts are due from the contingent consideration ~~milestones~~milestone payable related to the Adamas Acquisition. As of December 31, 2024, ~~the~~there was one remaining outstanding milestone, Milestone ~~Payment~~2025. isMilestone ~~payable~~2025 (subject to certain terms and conditions and may only be achieved once) is payable upon the first occurrence of the achievement of aggregate worldwide net sales of GOCOVRI in excess of $225 million during any consecutive twelve-month period ending on or before December 31, 2025. At December 31, 2025, Milestone 2025 was not met in 2025 and therefore is no longer outstanding nor payable.

85We also had contingent consideration milestones payable related to the USWM Acquisition. At December 31, 2024, there were two remaining outstanding milestones, one related to the approval of ONAPGO and the other related to the commercial launch of ONAPGO. Both milestones were met in 2025 and the liability was accreted to the milestone amounts due resulting in the recognition of $7.7 million change in fair value of contingent consideration during 2025. In February 2025, the Company paid the $25 million milestone related to the FDA's approval of ONAPGO in February 2025. ONAPGO was launched in April 2025 and the $30 million milestone payment related to the commercial launch of ONAPGO, subject to certain holdbacks as permitted under the Sale and Purchase Agreement Relating to USWM Enterprises, LLC, dated April 28, 2020, by and between US WorldMeds Partners, LLC and Supernus Pharmaceuticals, Inc., (USWM Sale and Purchase Agreement) became due and payable. Of the $30 million, the Company paid $2.3 million in the second quarter of 2025 and the remaining amount held was reclassified to Other current liabilities in the consolidated balance sheet as the milestone had been met but payment remains subject to certain holdbacks permitted under the USWM Sale and Purchase Agreement. The Company paid $1.9 million of the principal amount held back in the third quarter of 2025. The outstanding liability as of December 31, 2025 is $26.6 million, which included the principal amount held back and the interest. During the third quarter of 2025, USWorldsMeds Partners, LLC filed a complaint in the Superior Court of the State of Delaware seeking payment for the withheld amount, plus interest, attorney's fees and costs. See Part I Item 3 Legal Proceedings for further information on this matter.

The Company has contingent consideration milestones payable related to the Sage Acquisition. As of December 31, 2025, all milestone payments remain outstanding and payable upon achievement. Subject to the terms of the Sage CVR Agreement, $1.00 per share (equal to aggregate of $66.9 million) would be payable if in any calendar year between closing and end of 2027, annual net sales (as defined in the Sage CVR Agreement) of ZURZUVAE allocable to Supernus or any of its affiliates reach $250 million or more in the U.S., $1.00 per share (equal to aggregate of $66.9 million) would be payable if in any calendar year between closing and end of 2028, annual net sales (as defined in the Sage CVR Agreement) of ZURZUVAE allocable to Supernus or any of its affiliates reach $300 million or more in the U.S., (3) $1.00 per share (equal to aggregate of $66.9 million) would be payable if in any calendar year between closing and end of 2030, annual net sales (as defined in the Sage CVR Agreement) of ZURZUVAE allocable to Supernus or any of its affiliates reach $375 million or more in the U.S., and (4) $0.50 per share (equal to aggregate of $33.4 million) per share would be payable upon the first commercial sale in Japan to a third-party customer after regulatory approval for ZURZUVAE for the treatment of major depressive disorder (MDD) in Japan by June 30, 2026. As of December 31, 2025, the possible outcomes for the contingent consideration range, on an undiscounted basis, range from $0 to $234 million.

Further, with the Sage Acquisition in the third quarter of 2025, our investment balance decreased as marketable securities were sold to fund the acquisition of Sage. Refer to Part II, Item 7 - Management's Discussion and Analysis of Financial Condition and Results of Operations and Management's discussion on Financial Condition, Liquidity and Capital Resources of this Annual Report on Form 10-K for the period ended December 31, 2025, and Note 1, Business Organization, in the Notes to the Consolidated Financial Statements in Part II, Item 8 of this Annual Report.

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~~achievement~~In ofJanuary ~~aggregate~~2026, ~~worldwide~~the ~~net~~Company ~~sales~~entered ofinto ~~GOCOVRI~~an inagreement ~~excess~~with offormer ~~$225 million~~Biscayne ~~during~~security ~~any~~holders ~~consecutive~~wherein ~~twelve-month~~the ~~period~~Company ~~ending~~will onpay or$10.0 ~~before~~million ~~December~~on 31June 30, ~~2025~~2026 ~~(Milestone~~for ~~2025)~~settlement ~~and~~of ~~may~~certain ~~only~~developmental bemilestones ~~achieved~~under ~~once~~the merger agreement entered into in 2018.

AsBiogen ofCollaboration ~~December 31, 2024, the possible outcomes for the contingent consideration range, on an undiscounted basis, related to remaining 2025 Milestone is from $0 to $25 million.~~Obligations

WePursuant ~~also have contingent consideration milestones payable related~~ to the ~~USWM~~Biogen ~~Acquisition.~~Collaboration ~~On February 18~~Agreement, ~~2022, the FDA accepted the SPN-830 NDA for review, and~~ we ~~paid~~are ~~the~~jointly ~~resulting~~commercializing ~~$25 million~~ZURZUVAE ~~milestone~~ in the ~~first~~United ~~quarter~~States ofwith ~~2022~~Biogen. InWe ~~addition,~~have ~~there~~a ~~are~~contractual ~~two~~obligation ~~other~~to ~~regulatory~~share ~~and~~equally ~~developmental~~in ~~contingent~~all ~~consideration~~operating ~~milestone~~profits ~~payments:~~and ~~the~~losses ~~first~~arising isfrom athe ~~$25 million~~sales ~~milestone~~of ~~due~~ZURZUVAE ~~upon~~in the ~~FDA's regulatory approval and $30 million upon commercial launch of SPN-830~~U.S. ~~In February 2025~~Consequently, ~~the~~we ~~FDA~~are ~~approved~~required ~~ONAPGO~~to ~~(apomorphine~~fund ~~hydrochloride)~~50% ~~injection,~~of ~~formerly known as SPN-830, as~~ the ~~first~~development and ~~only~~commercialization ~~subcutaneous~~expenses ~~apomorphine~~incurred ~~infusion device~~ for the ~~treatment~~U.S. ofmarket, ~~motor~~including ~~fluctuations~~50% inof ~~adults~~the ~~with~~costs ~~advanced~~associated ~~PD.~~with ~~ONAPGO~~non-discretionary ~~will~~FDA bepost-marketing ~~launched~~requirements, insuch ~~the~~as ~~second~~required ~~quarter~~studies ofin ~~2025~~adolescent populations. AsTo ~~such,~~ the ~~Company~~extent ~~paid~~that ~~the~~shared ~~milestone~~commercialization ~~related~~and todevelopment ~~the~~expenses ~~FDA's~~exceed ~~approval~~net ofrevenues ~~the SPN-830 NDA~~ in ~~February~~any ~~2025.~~given Weperiod, ~~expect~~we ~~the~~are ~~remaining~~obligated ~~regulatory~~to ~~and~~make ~~developmental~~cash ~~milestones~~payments to ~~become~~fund ~~due~~our ~~and~~share beof ~~paid~~the inoperating ~~2025~~loss.

While Biogen records net product sales for ZURZUVAE in the U.S., the collaboration necessitates a periodic reconciliation process to ensure the equal sharing of economics, which results in net expense reimbursement payments between the parties. We may incur obligations to reimburse Biogen for our share of selling, general, and administrative expenses, and research and development expenses, in each case, when Biogen’s incurred costs exceed ours.

We are also currently responsible for the manufacturing supply chain for the collaboration. This requires us to finance the costs of manufacturing active pharmaceutical ingredients (API) and bulk drug product for commercialization in territories outside of the United States other than Japan, the Republic of Korea and Taiwan (the Biogen Territory). While Biogen is obligated to reimburse us for the costs of supply related to marketing and sales in the Biogen Territory, we are required to fund the initial cash payments to third-party contract manufacturing organizations prior to receiving reimbursement from Biogen. These manufacturing activities result in working capital requirements that fluctuate based, in part, on Biogen’s long-term demand forecasts for sales in the Biogen Territory and will continue until such time as Biogen assumes manufacturing responsibilities for the Biogen Territory as permitted under the agreement.

Navitor Development Agreement

We have obligations from the Development Agreement with Navitor Inc. we entered into in April 2020. The Company can terminate the Development Agreement upon 30 days' notice. Under the terms of the Development Agreement, the Company and Navitor Inc. will jointly conduct a Phase 2 clinical program for NV-5138 (SPN-820) for treatment-resistant depression. The Company will bear all of Phase 1 and Phase 2 development costs incurred by either party, up to a maximum of $50 million. There are certain additional payments which could be incurred by the Company that are contingent upon Navitor Inc. achieving defined milestones. These milestone payments include an additional license or acquisition fee depending on whether the Company ultimately licenses or acquires NV-5138, and subsequent clinical, regulatory and sales milestone payments. The Company has an option to acquire or license NV-5138 (SPN-820), for which additional payments would be required. In the second quarter of 2024, the Company consented to payment of additional Phase II development costs for NV-5138 (SPN-820) as they are incurred, but reserves the right to terminate payment of future development costs at its discretion. On May 5, 2025, the Company entered into a binding memorandum of understanding (MOU) with Navitor Inc. Under the MOU, the Company agreed to conduct further development activities at its own cost and Navitor Inc. agreed to waive its right to receive the $100 million Initial Acquisition Fee under the Development Agreement. In addition, pursuant to the MOU the Company exercised the Purchase Option to purchase all assets of Navitor and its affiliates pursuant to the Development Agreement, subject to, among other things, completion of satisfactory due diligence by the Company, and negotiation and execution of a definitive Purchase Agreement. On June 24, 2025, October 31, 2025 and December 22, 2025, the Company amended the MOU with Navitor to extend the negotiation period.

Royalty Payments

We obtained exclusive licenses from third parties for proprietary rights to support our commercial products and product candidates. We are obligated to pay royalties to third parties, computed as a percentage of net product sales, for each respective product under a license agreement, beginning upon commercialization. The amount of future royalty obligations are dependent on future net product sales of each of the respective products under a license agreement.

Other Obligations

We have other obligations in which the timing, likelihood and, in some situations, the amount of such payments are not known, which include the following:

•any milestone payments which may become payable to third parties under license agreements or contractual agreements regarding our clinical trials, or those which may become payable upon achieving sales, regulatory, and developmental milestones ~~per contractual agreements.~~

•liabilities related to uncertain tax positions. Due to uncertainties in the timing of potential tax audits, the timing and the amounts associated with the resolution of these positions is uncertain. As such, we are unable to make a reasonably reliable estimate regarding the timing of payments beyond 12 months.99

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per contractual agreements.

Off-Balance Sheet Arrangements

We do not currently have, nor have we ever had, any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or for other contractually narrow or limited purposes. In addition, we do not engage in trading activities involving non-exchange traded contracts.

Recently Issued Accounting Pronouncements

For a discussion of new accounting pronouncements, see Note 2, Summary of Significant Accounting Policies in the Notes to Consolidated Financial Statements in Part II, Item 8 of this report.

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ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

The primary objective of our investment activities is to preserve our capital to fund operations and to facilitate business development activities. We also seek to maximize income from our investments without assuming significant interest rate risk, liquidity risk, or risk of default by investing in investment grade securities with maturities of four years or less. Our exposure to market risk is confined to investments in cash and cash equivalents, and marketable securities. As of December 31, ~~2024~~2025, we had unrestricted cash and cash equivalents and marketable securities of $~~453~~308.67 million.

We fully repaid the outstanding principal and interest on the 2023 Notes in April 2023. We borrowed funds pursuant to our Credit Line in connection with the payment of the 2023 Notes. We fully repaid the outstanding debt under the Credit Line in June 2023. In the future, we may borrow funds under the Credit Line. Variable rate borrowing, which may occur under the Credit Line, exposes us to interest rate risk as increases in interest rates would increase our borrowing costs.

Any borrowed funds pursuant to our Credit Line are subject to a collateral maintenance requirement. The Credit Line is secured primarily by our portfolio of marketable securities, which is primarily comprised of corporate and U.S. government agency and municipal debt securities and may fluctuate in value. The fluctuations may be driven by, among other things, changes in interest rates, economic conditions, and other financial conditions as well as idiosyncratic factors related to a security’s issuer. To the extent a fluctuation in value results in the value of the collateral decreasing below the required collateral maintenance requirements we may be required to promptly post additional collateral. Additionally, our Credit Line is an uncommitted facility that may be terminated by the lender at any time. During periods of rapidly changing interest rates, economic conditions or other financial conditions, the Credit Line may be terminated by the lender and/or the lender may declare that all borrowings thereunder are immediately due.

Our cash and cash equivalents consist primarily of cash held at banks and investments in highly liquid financial instruments with an original maturity of three months or less. Our marketable securities, which are reported at fair value, consist of investments in U.S. Treasury bills and notes; bank certificates of deposit; various U.S. governmental agency debt securities; and corporate and municipal debt securities. We place all investments with governmental, industrial, or financial institutions whose debt is rated as investment grade. We generally hold these securities to maturities of one to four years. Because of the relatively short period that we hold our investments and because we generally hold these securities to maturity, we do not believe that an increase in interest rates would have any significant impact on the realizable value of our investments.

We may contract with clinical research organizations (CROs) and investigational sites globally. Currently, we have ongoing clinical trials being conducted outside the U.S. We do not hedge our foreign currency exchange rate risk. Transactions denominated in currencies other than the U.S. dollar are recorded based on exchange rates at the time such transactions arise. As of December 31, ~~2024~~2025, and December 31, ~~2023~~2024, substantially all of our liabilities were denominated in the U.S. dollar.

Inflation generally affects us by increasing our cost of labor and the cost of services provided by our vendors. We do not believe that inflation and changing prices over the years ended December 31, ~~2024~~2025, and ~~2023~~2024 had a significant impact on our consolidated results of operations. While we expect significant year-to-year variability in labor and vendor service costs due to uncontrollable inflation factors like natural disasters, geopolitical conflicts, and government regulations, we strive to mitigate future price risks. We do this by forming strong partnerships with key suppliers and our CMOs, and by directly managing the ~~procurement and supply levels of key raw materials for our commercial products. However, these efforts may not fully protect us from cost increases, which could adversely impact our profitability.~~

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procurement and supply levels of key raw materials for our commercial products. However, these efforts may not fully protect us from cost increases, which could adversely impact our profitability.

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ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

Supernus Pharmaceuticals, Inc.

Consolidated Financial Statements

Reports of Independent Registered Public Accounting Firm (PCAOB ID 185)			89103
Consolidated Balance Sheets			92107
Consolidated Statements of Earnings			93
Consolidated Statements of Earnings (Loss)			108
Consolidated Statements of Comprehensive Earnings			94
Consolidated Statements of Comprehensive Earnings (Loss)			109
Consolidated Statements of Changes in Stockholders' Equity			95110
Consolidated Statements of Cash Flows			96111
Notes to Consolidated Financial Statements			97112

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Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors

Supernus Pharmaceuticals, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Supernus Pharmaceuticals, Inc. and subsidiaries (the Company) as of December 31, ~~2024~~2025 and ~~2023~~2024, the related consolidated statements of earnings (loss), comprehensive earnings (loss), changes in stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, ~~2024~~2025, and the related notes (collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, ~~2024~~2025 and ~~2023~~2024, and the results of its operations and its cash flows for each of the years in the three-year period ended December 31, ~~2024~~2025, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, ~~2024~~2025, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated ~~February~~March 252, ~~2025~~2026 expressed an unqualified opinion on the effectiveness of the Company's internal control over financial reporting.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of a critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Accrued sales deductions related to product returns

As disclosed in Notes 2 and 1416 to the consolidated financial statements, the Company recorded accrued product returns of $5337,~~375~~800 (dollars in thousands) as of December 31, ~~2024~~2025. The related provision for product returns is reflected as a reduction of gross product sales, and is recorded at the time of sale when the customer takes title to the product. Sale of the Company’s products are not subject to a general right of return; however, the Company will accept return of expired product six months prior to and up to 12 months subsequent to the product’s expiry date for certain products. The Company's products have a shelf life of up to 48 months from date of manufacture.

We identified the evaluation of accrued sales deductions related to Trokendi XR, Oxtellar XR and Qelbree product returns, and specifically the assessment of the expected long-term return rates, as a critical audit matter. The assessment of the expected long-term return rates included a comparison to actual returns experience and involved a high degree of auditor judgment due to the significant passage of time between product sale and the time at which the Company issues credit for expired product.

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The following are the primary procedures we performed to address this critical audit matter. We evaluated the design and tested the operating effectiveness of certain internal controls related to the accrued sales deductions process. This included a control over the expected long-term return rate assumptions used in estimating the accrued product returns. We assessed the Company's long-term return rate assumptions by evaluating the consistency of those assumptions with the trend of actual historical return rates. We compared prior period expected long-term return rate assumptions against actual return rates experience.

/s/ KPMG LLP

We have served as the Company's auditor since 2015.

Baltimore, Maryland

~~February~~March 252, ~~2025~~2026

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Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors

Supernus Pharmaceuticals, Inc.:

Opinion on Internal Control Over Financial Reporting

We have audited Supernus Pharmaceuticals, Inc. and subsidiaries' (the Company) internal control over financial reporting as of December 31, ~~2024~~2025, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, ~~2024~~2025, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, ~~2024~~2025 and ~~2023~~2024, the related consolidated statements of earnings (loss), comprehensive earnings (loss), changes in stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, ~~2024~~2025, and the related notes (collectively, the consolidated financial statements), and our report dated ~~February~~March 252, ~~2025~~2026 expressed an unqualified opinion on those consolidated financial statements.

The Company acquired Sage Therapeutics, Inc. during 2025, and management excluded from its assessment of the effectiveness of the Company’s internal control over financial reporting as of December 31, 2025, Sage Therapeutics, Inc.’s internal control over financial reporting associated with 9% of total revenues and 7% of total assets included in the consolidated financial statements of the Company as of and for the year ended December 31, 2025. Our audit of internal control over financial reporting of the Company also excluded an evaluation of the internal control over financial reporting of Sage Therapeutics, Inc.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

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Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ KPMG LLP

Baltimore, Maryland

~~February~~March 252, ~~2025~~2026

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Supernus Pharmaceuticals, Inc.

Consolidated Balance Sheets

(in thousands, except share and per share data)

	December 31, 2024		December 31, 2023
	December 31, 2025		December 31, 2024
Assets
Current assets
Cash and cash equivalents	$	69128,~~331~~448	$	7569,~~054~~331
Marketable securities	~~384~~180,~~281~~222		~~179~~384,~~820~~281
Accounts receivable, net	~~142~~187,~~077~~802		~~144~~142,~~155~~077
Inventories, net	5482,~~293~~385		7754,~~408~~293
Prepaid expenses and other current assets	3665,~~088~~325		1636,~~676~~088
Total current assets	~~686~~644,~~070~~182		~~493~~686,~~113~~070
Long-term marketable securities	—		16,617
Restricted cash	1,450		—
Property and equipment, net	1110,~~545~~531		1311,~~530~~545
Intangible assets, net	~~521~~569,~~912~~456		~~599~~521,~~889~~912
Goodwill	~~117~~124,~~019~~882		117,019
Other assets	31,527		37,505
Deferred income tax assets, net	38,351		—
Total assets	$	1,368,073	$	1,277,673
Other assets	63,796		31,527
Liabilities and stockholders’ equity
Total assets	$	1,452,648	$	1,368,073
Liabilities and stockholders' equity
Current liabilities
Accounts payable and accrued liabilities	$	76107,~~352~~800	$	7976,~~569~~352
Accrued product returns and rebates	~~168~~161,~~705~~097		~~154~~168,~~274~~705
Contingent consideration, current portion	4731,~~340~~052		5247,~~070~~340
Other current liabilities	—38,222		~~4,283~~—
Total current liabilities	~~292~~338,~~397~~171		~~290~~292,~~196~~397
Contingent consideration, long-term	—206		~~1,380~~—
Operating lease liabilities, long-term	2730,~~382~~365		3327,~~196~~382
Deferred income tax liabilities, net	~~4,961~~—		244,~~963~~961
Other liabilities	722,~~600~~192		67,~~422~~600
Total liabilities	~~332~~390,~~340~~934		~~356~~332,~~157~~340
Commitments and contingencies (Note 16)
Commitments and contingencies (Note 18)
Stockholders’ equity
Stockholders' equity
Common stock, $0.001 par value; 130,000,000 shares authorized; 55,743,095 and 54,723,356 shares issued and outstanding as of December 31, 2024 and December 31, 2023, respectively	56		55
Common stock, $0.001 par value; 130,000,000 shares authorized; 57,457,462 and 55,743,095 shares issued and outstanding as of December 31, 2025 and December 31, 2024, respectively	57		56
Additional paid-in capital	~~479~~543,~~440~~825		~~439~~479,~~493~~440
Accumulated other comprehensive loss, net of tax	(~~189~~44)		(~~593~~189)
Retained earnings	~~556~~517,~~426~~876		~~482~~556,~~561~~426
Total stockholders’ equity	1,035,733		921,516
Total stockholders' equity	1,061,714		1,035,733
Total liabilities and stockholders’ equity	$	1,368,073	$	1,277,673
Total liabilities and stockholders' equity	$	1,452,648	$	1,368,073

See accompanying notes.

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Supernus Pharmaceuticals, Inc.

Consolidated Statements of Earnings (Loss)

(in thousands, except share and per share data)

	Year Ended December 31,
	2024		2023		2022
	2025		2024		2023
Revenues
Net product sales	$	~~637~~626,~~696~~536	$	~~573~~637,~~933~~696	$	~~649~~573,~~432~~933
Royalty, licensing and other revenues	24,121		33,588		17,806
Collaboration revenue (ZURZUVAE)	52,996		—		—
Total revenues	661,817		607,521		667,238
Royalty, licensing, and other revenues	39,420		24,121		33,588
Total revenues	718,952		661,817		607,521
Costs and expenses
Cost of goods sold(a)	77,906		83,779		87,221
Cost of revenues(a)	74,562		77,906		83,779
Research and development	~~108~~106,~~796~~235		91108,~~593~~796		7491,~~552~~593
Selling, general and administrative	~~321~~485,~~582~~563		~~336~~321,~~361~~582		~~377~~336,~~221~~361
Amortization of intangible assets	7789,~~977~~456		8277,~~385~~977		82,~~630~~385
Intangible asset impairment charges	—		~~20,189~~—		—20,189
Contingent consideration gain	(6,110)		(1,517)		(510)
Contingent consideration loss (gain)	25,419		(6,110)		(1,517)
Total costs and expenses	~~580~~781,~~151~~235		~~612~~580,~~790~~151		~~621~~612,~~114~~790
Operating earnings (loss)	81(62,~~666~~283)		(581,~~269)~~666		46(5,~~124~~269)
Other income (expense)
Interest and other income, net	1613,~~204~~253		1016,~~453~~204		2110,~~689~~453
Interest expense	—		~~(2,415)~~—		(72,~~070~~415)
Total other income (expense), net	1613,~~204~~253		816,~~038~~204		148,~~619~~038
Earnings before income taxes	97,870		2,769		60,743
Earnings (loss) before income taxes	(49,030)		97,870		2,769
Income tax expense	24,005		1,453		32
Income tax expense (benefit)	(10,480)		24,005		1,453
Net earnings	$	73,865	$	1,316	$	60,711
Net earnings (loss)	$	(38,550)	$	73,865	$	1,316
Earnings per share
Earnings (Loss) per share
Basic	$	1(0.3468)	$	01.0234	$	10.1302
Diluted	$	1(0.3268)	$	01.0232	$	10.0402
Weighted average shares outstanding
Basic	5556,~~100~~451,~~063~~136		5455,~~536~~100,~~281~~063		5354,~~665~~536,~~143~~281
Diluted	5556,~~958~~451,~~537~~136		55,~~506~~958,~~828~~537		6155,~~679~~506,~~800~~828

(a) Excludes amortization of intangible assets.

See accompanying notes.

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Supernus Pharmaceuticals, Inc.

Consolidated Statements of Comprehensive Earnings (Loss)

(in thousands)

	Year Ended December 31,
	2024		2023		2022
	2025		2024		2023
Net earnings	$	73,865	$	1,316	$	60,711
Net earnings (loss)	$	(38,550)	$	73,865	$	1,316
Other comprehensive gain (loss)
Unrealized gain (loss) on marketable securities, net of tax	~~404~~145		~~2,617~~404		(42,~~749)~~617
Other comprehensive gain (loss)	~~404~~145		~~2,617~~404		(42,~~749)~~617
Comprehensive earnings	$	74,269	$	3,933	$	55,962
Comprehensive earnings (loss)	$	(38,405)	$	74,269	$	3,933

See accompanying notes.

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Supernus Pharmaceuticals, Inc.

Consolidated Statements of Changes in Stockholders' Equity

(in thousands, except share data)

	Common Stock			AdditionalPaid-inCapital		AccumulatedOtherComprehensiveEarnings (Loss)		RetainedEarnings		TotalStockholders'Equity
	Shares	Amount
Balance, December 31, 2021	53,256,094	$	53	$	434,337	$	1,539	$	379,922	$	815,851
Balance, December 31, 2022	54,253,796	$	54	$	408,115	$	(3,210)	$	481,245	$	886,204
Cumulative effect of adoption of ASU 2020-06	—	—		(56,212)		—		40,612		(15,600)
Balance, January 1, 2022	53,256,094	53		378,125		1,539		420,534		800,251
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		17,568		—		—		17,568
Issuance of common stock related to employee stock purchase plan and share-based awards	997,702	1		12,422		—		—		12,423
Net earnings	—	—		—		—		60,711		60,711
Unrealized loss on marketable securities, net of tax	—	—		—		(4,749)		—		(4,749)
Balance, December 31, 2022	54,253,796	54		408,115		(3,210)		481,245		886,204
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		26,759		—		—		26,759
Issuance of common stock related to employee stock purchase plan and share-based awards	469,560	1		4,619		—		—		4,620
Net earnings	—	—		—		—		1,316		1,316
Unrealized gain on marketable securities, net of tax	—	—		—		2,617		—		2,617
Balance, December 31, 2023	54,723,356	55		439,493		(593)		482,561		921,516
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		27,755		—		—		27,755
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	1,019,739	1		12,192		—		—		12,193
Net earnings	—	—		—		—		73,865		73,865
Unrealized gain on marketable securities, net of tax	—	—		—		404		—		404
Balance, December 31, 2024	55,743,095	$56	56	$479,440	~~479,440~~	$(189)	~~(189)~~	$556,426	~~556,426~~	$1,035,733	~~1,035,733~~
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		31,000		—		—		31,000
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	1,714,367	1		33,385		—		—		33,386
Net loss	—	—		—		—		(38,550)		(38,550)
Unrealized gain on marketable securities, net of tax	—	—		—		145		—		145
Balance, December 31, 2025	57,457,462	$	57	$	543,825	$	(44)	$	517,876	$	1,061,714

See accompanying notes.

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Supernus Pharmaceuticals, Inc.

Consolidated Statements of Cash Flows

(in thousands)

	Year Ended December 31,
	2024		2023		2022
	2025		2024		2023
Cash flows from operating activities
Net earnings	$	73,865	$	1,316	$	60,711
Net earnings (loss)	$	(38,550)	$	73,865	$	1,316
Adjustments to reconcile net earnings to net cash provided by operating activities:
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Depreciation and amortization	8091,~~414~~563		8480,~~859~~414		8584,~~543~~859
Other income from Navitor (see Note 4)	—		—		(12,888)
Intangible asset impairment charges	—		—		20,189
Intangible asset impairment charges	—		20,189		—
Amortization of deferred financing costs and debt discount	—		—		532
Amortization of deferred financing costs and debt discount	—		532		2,112
Realized loss (gains) from sales of marketable securities	439		(9)		—
Realized gains from sales of marketable securities	(9)		—		(14)
Amortization of premium/discount on marketable securities	(1,529)		1,823		(122)
Amortization of premium/discount on marketable securities	1,823		(122)		3,233
Change in fair value of contingent consideration	25,419		(6,110)		(1,517)
Change in fair value of contingent consideration	(6,110)		(1,517)		(510)
Share-based compensation expense	33,051		27,755		26,759
Share-based compensation expense	27,755		26,759		17,568
Deferred income tax benefit	5,206		(20,136)		(25,714)
Deferred income tax benefit	(20,136)		(25,714)		(26,324)
Inventory valuation write-down	1,926		8,876		8,023
Inventory valuation write-down	8,876		8,023		10,442
Payment of contingent consideration	(4,900)		—		—
Other noncash adjustments, net	7,525		5,897		1,196
Noncash lease expense	7,980		5,452		6,503
Other noncash adjustments, net	1,885		2,073		(606)
Changes in operating assets and liabilities:
Accounts receivable	2(22,~~078~~304)		182,~~765~~078		~~(16~~18,~~366)~~765
Inventories	15(7,~~806~~502)		615,~~110~~806		~~(17~~6,~~858)~~110
Prepaid expenses and other assets	(1913,~~352~~179)		(~~334~~19,352)		~~12,303~~(334)
Accrued product returns and rebates	14(7,~~431~~608)		214,~~609~~431		182,~~941~~609
Accounts payable and other liabilities	(1524,~~015~~566)		(3615,~~287~~015)		(1936,~~163~~287)
Payment of contingent consideration	—		—		(2,100)
Net cash provided by operating activities	47,331		171,951		111,085
Net cash provided by operating activities	171,951		111,085		116,826
Cash flows from investing activities
Purchases of marketable securities	(688,013)		(101,621)		(406,990)
Acquisition of Sage, net of cash acquired	(293,093)		—		—
Maturities of marketable securities	498,871		370,901		190,739
Purchases of marketable securities	(475,941)		(688,013)		(101,621)
Purchases of property and equipment	(725)		(551)		(412)
Maturities of marketable securities	774,478		498,871		370,901
Net cash provided by (used in) investing activities	(189,867)		268,729		(216,663)
Purchases of property and equipment	(1,338)		(725)		(551)
Net cash provided by (used in) investing activities	4,106		(189,867)		268,729
Cash flows from financing activities
Proceeds from Credit Line	—		~~93,000~~—		—93,000
Payments on Credit Line	—		~~(93,000)~~—		—(93,000)
Payment on convertible notes	—		~~(402,500)~~—		—(402,500)
Proceeds from issuance of common stock	1437,~~908~~616		614,~~610~~908		126,~~423~~610
Employee taxes paid related to net share settlement of equity awards	(24,~~715~~229)		(12,~~990~~715)		—(1,990)
Payment of contingent consideration	—(24,257)		—		~~(22,900)~~—
Net cash provided by (used in) financing activities	129,~~193~~130		~~(397~~12,~~880)~~193		(10397,~~477~~880)
Net change in cash and cash equivalents	(5,723)		(18,066)		(110,314)
Net change in cash, cash equivalents, and restricted cash	60,567		(5,723)		(18,066)
Cash and cash equivalents at beginning of year	7569,~~054~~331		9375,~~120~~054		~~203~~93,~~434~~120
Cash and cash equivalents at end of year	$	69,331	$	75,054	$	93,120
Cash, cash equivalents, and restricted cash at end of year	$	129,898	$	69,331	$	75,054
Reconciliation of cash, cash equivalents, and restricted cash reported in the consolidated balance sheets
Cash and cash equivalents	$	128,448	$	69,331	$	75,054
Restricted cash	1,450		—		—
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows	$	129,898	$	69,331	$	75,054
Supplemental cash flow information
Cash paid for income taxes	$	5316,~~254~~051	$	3653,~~602~~254	$	1636,~~200~~602
Cash paid for interest on debt	$	—	$	~~1,946~~—	$	21,~~516~~946
Noncash investing and financing activities
Property and equipment additions from utilization of tenant improvement allowance	—		—		$	580

See accompanying notes.

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Table of Contents

Supernus Pharmaceuticals, Inc.

Notes to Consolidated Financial Statements

1. Business Organization

Supernus Pharmaceuticals, Inc. (the Company, see Consolidation in Note 2, Summary of Significant Accounting Policies) was incorporated in Delaware and commenced operations in 2005. The Company is a biopharmaceutical company focused on developing and commercializing products for the treatment of central nervous system (CNS) diseases. The Company's diverse neuroscience portfolio includes approved treatments for attention-deficit hyperactivity disorder (ADHD), dyskinesia in Parkinson's Disease (PD) patients receiving levodopa-based therapy, hypomobility in PD, postpartum depression (PPD), epilepsy, migraine, cervical dystonia, and chronic sialorrhea. The Company is developing a broad range of novel ~~CNS~~ product candidates ~~including new potential treatments~~ for ~~hypomobility in PD, epilepsy, depression, and other~~ CNS disorders.

The Company has ~~eight~~nine commercial products: Qelbree®, GOCOVRI®, Oxtellar XR®, APOKYN®, Trokendi XR®, XADAGO®, MYOBLOC®, ~~and~~ ONAPGOTM , (formerly known as SPN-830), and ZURZUVAE® (see Note 3, Sage Acquisition). In February 2025, the FDA approved ONAPGO (apomorphine hydrochloride) injection as the first and only subcutaneous apomorphine infusion device for the treatment of motor fluctuations in adults with advanced PD. ONAPGO ~~will~~was be launched in ~~the~~April ~~second~~2025. ~~quarter~~In ofSeptember 2025., the Federal Drug Administration (FDA) withdrew the New Drug Application (NDA) for OSMOLEX ER.

Acquisition of Sage Therapeutics, Inc. and Reorganization

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