0002032950false--12-31Q120260.00011000000000000.0001490000000218000021800004900000000.0001falsefalsefalsefalsetrue0711350000020329502026-01-012026-03-310002032950us-gaap:OperatingSegmentsMember2025-01-012025-03-310002032950us-gaap:OperatingSegmentsMember2026-01-012026-03-310002032950hspt:PrivateUnitsMemberhspt:RightMember2025-12-310002032950hspt:IndependentDirectorMember2024-07-012024-07-260002032950hspt:IndependentDirectorMember2024-07-260002032950srt:ChiefFinancialOfficerMember2024-07-260002032950hspt:SponsorMember2023-03-210002032950hspt:SponsorMember2024-07-012024-07-260002032950hspt:SponsorMember2024-07-260002032950hspt:RightMember2025-12-310002032950hspt:RightMember2026-03-310002032950hspt:RightMember2026-01-012026-03-310002032950hspt:UnderwriterMember2026-03-310002032950hspt:UnderwriterMember2026-01-012026-03-310002032950hspt:TopMember2026-03-310002032950us-gaap:OverAllotmentOptionMemberhspt:TopMember2024-11-012024-11-210002032950hspt:UnderwritersAgreementMember2024-11-012024-11-180002032950hspt:UnderwritersAgreementMember2024-11-012024-11-210002032950hspt:PromissoryNoteAgreementMember2025-07-022025-07-050002032950hspt:PromissoryNoteAgreementMember2025-12-310002032950hspt:PromissoryNoteAgreementMember2026-03-310002032950hspt:PromissoryNoteAgreementMember2024-07-250002032950us-gaap:RelatedPartyMember2024-11-210002032950us-gaap:RelatedPartyMember2024-11-012024-11-180002032950us-gaap:RelatedPartyMember2024-11-1800020329502023-03-012023-03-2100020329502026-05-1800020329502025-11-012025-11-1700020329502025-11-1700020329502024-07-012024-07-2600020329502025-01-012025-12-310002032950hspt:OrdinarySharesSubjectToRedemptionMember2026-01-012026-03-310002032950hspt:BusinessCombinationEGMMember2026-01-012026-03-310002032950hspt:BusinessCombinationEGMMember2026-02-120002032950hspt:OrdinarySharesSubjectToRedemptionMember2026-02-012026-02-120002032950hspt:OrdinarySharesSubjectToRedemptionMember2026-02-120002032950hspt:OrdinarySharesSubjectToRedemptionMember2026-03-310002032950us-gaap:FairValueInputsLevel1Member2026-03-310002032950us-gaap:FairValueInputsLevel1Member2025-12-310002032950hspt:RedeemableOrdinaryStockMember2025-01-012025-03-310002032950hspt:RedeemableOrdinaryStockMember2026-01-012026-03-310002032950hspt:NonRedeemableOrdinaryStockMember2025-01-012025-03-310002032950hspt:NonRedeemableOrdinaryStockMember2026-01-012026-03-310002032950hspt:BusinessCombinationAgreementMember2025-05-090002032950hspt:BusinessCombinationAgreementMember2025-05-012025-05-090002032950hspt:TopMember2026-01-012026-03-310002032950hspt:UnderwriterMember2024-11-210002032950hspt:UnderwriterMember2024-11-012024-11-210002032950us-gaap:IPOMember2024-11-180002032950us-gaap:IPOMember2024-11-012024-11-180002032950us-gaap:OverAllotmentOptionMember2024-11-012024-11-190002032950us-gaap:PrivatePlacementMember2026-03-310002032950us-gaap:PrivatePlacementMember2026-01-012026-03-310002032950hspt:AdditionalPrivateUnitsMember2024-11-210002032950hspt:AdditionalPrivateUnitsMember2024-11-012024-11-2100020329502026-02-1800020329502025-11-3000020329502024-11-012024-11-180002032950us-gaap:RetainedEarningsMember2026-03-310002032950us-gaap:AdditionalPaidInCapitalMember2026-03-310002032950hspt:OrdinaryShareMember2026-03-310002032950us-gaap:PreferredStockMember2026-03-310002032950us-gaap:RetainedEarningsMember2026-01-012026-03-310002032950us-gaap:AdditionalPaidInCapitalMember2026-01-012026-03-310002032950hspt:OrdinaryShareMember2026-01-012026-03-310002032950us-gaap:PreferredStockMember2026-01-012026-03-310002032950us-gaap:RetainedEarningsMember2025-12-310002032950us-gaap:AdditionalPaidInCapitalMember2025-12-310002032950hspt:OrdinaryShareMember2025-12-310002032950us-gaap:PreferredStockMember2025-12-3100020329502025-03-310002032950us-gaap:RetainedEarningsMember2025-03-310002032950us-gaap:AdditionalPaidInCapitalMember2025-03-310002032950hspt:OrdinaryShareMember2025-03-310002032950us-gaap:PreferredStockMember2025-03-310002032950us-gaap:RetainedEarningsMember2025-01-012025-03-310002032950us-gaap:AdditionalPaidInCapitalMember2025-01-012025-03-310002032950hspt:OrdinaryShareMember2025-01-012025-03-310002032950us-gaap:PreferredStockMember2025-01-012025-03-3100020329502024-12-310002032950us-gaap:RetainedEarningsMember2024-12-310002032950us-gaap:AdditionalPaidInCapitalMember2024-12-310002032950hspt:OrdinaryShareMember2024-12-310002032950us-gaap:PreferredStockMember2024-12-3100020329502025-01-012025-03-310002032950hspt:OrdinaryStocksMember2025-12-310002032950hspt:OrdinaryStocksMember2026-03-3100020329502025-12-3100020329502026-03-3100020329502026-05-150002032950hspt:UnitsConsistingOfOneOrdinaryShareMember2026-01-012026-03-310002032950hspt:OrdinaryStocksMember2026-01-012026-03-310002032950hspt:RightsEachWholeRightToAcquireMember2026-01-012026-03-31iso4217:USDxbrli:sharesiso4217:USDxbrli:sharesxbrli:pure

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended March 31, 2026

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

For the transition period from _______ to _______

Commission file number: 001-42406

HORIZON SPACE ACQUISITION II CORP.

(Exact name of registrant as specified in its charter)

Cayman Islands		N/A
(State or other jurisdiction of		(I.R.S. Employer
incorporation or organization)		Identification No.)

1412 Broadway, 21st Floor, Suite 21V,

New York, NY 10018

(Address of principal executive offices)

(646)257-5537

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Units, consisting of one ordinary share, $0.0001 par value, and one Right to acquire one-tenth of one ordinary share	HSPTU	The Nasdaq Stock Market LLC
Ordinary shares, par value $0.0001 per share	HSPT	The Nasdaq Stock Market LLC
Rights, each whole right to acquire one-tenth of one ordinary share	HSPTR	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant has (1) 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 (clso§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, or 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.

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. ☐

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

As of the date hereof, there were 5,860,689 ordinary shares of the Company, par value $0.0001 per share issued and outstanding.

HORIZON SPACE ACQUISITION II CORP.

FORM 10-Q

FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2026

TABLE OF CONTENTS

		Page
Part I.	Financial Information
Item 1.	Financial Statements (Unaudited)	3
	CONDENSED BALANCE SHEETS	3
	UNAUDITED CONDENSED STATEMENTS OF OPERATIONS	4
	UNAUDITED CONDENSED STATEMENTS OF SHAREHOLDERS’ (DEFICIT) EQUITY	5
	UNAUDITED CONDENSED STATEMENTS OF CASH FLOWS	6
	Notes to Unaudited Condensed Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	22
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	25
Item 4.	Controls and Procedures	25
Part II	Other Information
Item 1.	Legal Proceedings	27
Item 1A.	Risk Factors	27
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	27
Item 3.	Defaults upon Senior Securities	27
Item 4.	Mine Safety Disclosures	27
Item 5.	Other Information	27
Item 6.	Exhibits	28
Signatures		29

Table of Contents

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements

HORIZON SPACE ACQUISITION II CORP.

CONDENSED BALANCE SHEETS

(Currency expressed in United States Dollars (“US$”), except for number of shares)

	March 31, 2026			December 31, 2025
	(Unaudited)			(Audited)
Assets
Current Assets
Cash	$	9,586		$	7,917
Prepaid expense		72,395			21,614
Total Current Assets		81,981			29,531

Investment held in Trust Account		39,390,860			72,924,060

Total Assets	$	39,472,841		$	72,953,591

Liabilities, Ordinary Shares Subject to Possible Redemptions and Shareholders’ Deficit
Current Liabilities
Promissory note, related party	$	990,000		$	990,000
Amount due to related party		571,134			354,484
Promissory note, third party		100,000			-
Ordinary shares subject to redemption		37,482,848			-
Other payable and accrued expenses		205,401			4,696
Total Current Liabilities		39,349,383			1,349,180

Total Liabilities		39,349,383			1,349,180

Commitments and Contingencies (Note 7)

Ordinary shares, $0.0001 par value, 490,000,000 shares authorized, 178,285 and 6,900,000 shares subject to possible redemption at $10.70 and $10.57 per share as of March 31,2026 and December 31,2025, respectively.		1,908,012			72,924,060

Shareholder's Deficit:
Preferred share, $0.0001 par value, 10,000,000 shares authorized, none issued and outstanding		-			-
Ordinary shares, $0.0001 par value, 490,000,000 shares authorized, 2,180,000 shares issued and outstanding as of March 31, 2026 and December 31, 2025 (excluding 3,502,404 shares subject to redemption and 178,285 shares subject to possible redemption as of March 31, 2026, and 6,900,000 shares subject to possible redemption as of December 31, 2025), respectively		218			218
Additional paid-in capital		-			-
Accumulated deficit		(1,784,772	)		(1,319,867	)
Total Shareholder's Deficit		(1,784,554	)		(1,319,649	)
Total Liabilities Ordinary Shares Subject to Possible Redemptions and Shareholder’s Deficit	$	39,472,841		$	72,953,591

The accompanying notes are an integral part of these unaudited condensed financial statements.

Table of Contents

HORIZON SPACE ACQUISITION II CORP.

UNAUDITED CONDENSED STATEMENTS OF OPERATIONS

(Currency expressed in United States Dollars (“US$”), except for number of shares)

	For the Three Months Ended March 31, 2026			For the Three Months Ended March 31, 2025

Formation and operating costs	$	364,905		$	253,479
Loss from operations		(364,905	)		(253,479	)

Other income
Interest and dividend income on investments held in Trust		588,076			726,071
Interest expense		(252,293	)		-
Net (loss) income		(29,122	)		472,592

Weighted average shares outstanding of redeemable ordinary shares		1,752,170			6,900,000
Basic and diluted net income per share, ordinary shares	$	0.07		$	0.08
Weighted average shares outstanding of non-redeemable ordinary shares		2,180,000			2,180,000
Basic and diluted net loss per share, non-redeemable ordinary shares	$	(0.06	)	$	(0.03	)

The accompanying notes are an integral part of these unaudited condensed financial statements.

Table of Contents

HORIZON SPACE ACQUISITION II CORP.

UNAUDITED CONDENSED STATEMENTS OF SHAREHOLDERS' (DEFICIT) EQUITY

(Currency expressed in United States Dollars (“US$”), except for number of shares)

									Additional					Total
	Preferred Shares				Ordinary Shares				Paid-in		Accumulated			Shareholder's
	Shares		Amount		Shares		Amount		Capital		Deficit			Deficit
Balance as of December 31,2025 (Audited)		-	$	-		2,180,000	$	218	$	-	$	(1,319,867	)	$	(1,319,649	)
Accretion of carrying value to redemption value		-		-		-		-		-		(435,783	)		(435,783	)
Net income		-		-		-		-		-		(29,122	)		(29,122	)
Balance as of March 31, 2026 (Unaudited)		-	$	-		2,180,000	$	218	$	-	$	(1,784,772	)	$	(1,784,554	)

									Additional						Total
	Preferred Shares				Ordinary Shares				Paid-in			Retained			Shareholder's
	Shares		Amount		Shares		Amount		Capital			Earning			Equity
Balance as of December 31, 2024 (Audited)		-	$	-		2,180,000	$	218	$	312,035		$	138,622		$	450,875
Accretion of carrying value to redemption value		-		-		-		-		(312,035	)		(414,036	)		(726,071	)
Net income		-		-		-		-		-			472,592			472,592
Balance as of March 31, 2025 (Unaudited)		-	$	-		2,180,000	$	218	$	-		$	197,178		$	197,396

The accompanying notes are an integral part of these unaudited condensed financial statements.

Table of Contents

HORIZON SPACE ACQUISITION II CORP.

UNAUDITED CONDENSED STATEMENTS OF CASH FLOWS

(Currency expressed in United States Dollars (“US$”), except for number of shares)

	For the Three Months Ended March 31, 2026			For the Three Months Ended March 31, 2025
Cash Flows from Operating Activities:
Net (loss) income	$	(29,122	)	$	472,592
Adjustments to reconcile net income to net cash provided by operating activities:
Dividend and interest income on Trust Account		(588,076	)		(726,071	)
Interest expense		252,293			-
Changes in operating assets and liabilities:
Prepaid expense		(50,781	)		(50,781	)
Accrued expense		200,705			22,316
Net Cash Used in Operating Activities		(214,981	)		(281,944	)

Cash flows from investing activities:
Proceeds from sale of investments in the Trust Account		34,221,276			-
Extension fee deposited into Trust Account		(100,000	)		-
Net Cash Provided by Investing Activities		34,121,276			-

Cash Flows from Financing Activities:
Ordinary shares redemption		(34,221,276	)		-
Proceed from promissory note, third party		100,000			-
Proceeds from related party		216,650			-
Net Cash Used in Financing Activities		(33,904,626	)		-

Net Change in Cash		1,669			(281,944	)

Cash at beginning of the period		7,917			646,720
Cash, end of the period	$	9,586		$	364,776

Supplemental Disclosure of Cash Flow Information:
Subsequent accretion of carrying value for public shares to redemption value	$	435,783		$	726,071
Ordinary share subject to redemption	$	37,230,555		$	-

The accompanying notes are an integral part of these unaudited condensed financial statements.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

Note 1 — Organization, Business Operation and Going Concern Consideration

Horizon Space Acquisition II Corp. (the “Company”) is a blank check company incorporated in the Cayman Islands on March 21, 2023 (“Inception”). The Company was formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization, or similar business combination with one or more businesses (the “Business Combination”). The Company has selected December 31 as its fiscal year end.

As of March 31, 2026, the Company had not commenced any operations. For the period from March 21, 2023 (inception) through March 31, 2026, the Company’s efforts have been limited to organizational activities as well as activities related to the initial public offering, identifying a target company for a Business Combination and completing the SL Bio Business Combination (as defined below). The Company will not generate any operating revenues until after the completion of a Business Combination, at the earliest. The Company will generate non-operating income in the form of dividend and/or interest income from the proceeds derived from the IPO (as defined below) and private placement (“Private Placement,” see Note 4).

The Company’s founder and sponsor is Horizon Space Acquisition II Sponsor Corp., a Cayman Islands company (the “Sponsor”). The Company’s ability to commence operations is contingent upon obtaining adequate financial resources through IPO and the Private Placement.

On November 18, 2024, the Company consummated its initial public offering (the “IPO”) of 6,000,000 units (“Units”). Each unit consists of one ordinary share, and one right to receive one-tenth (1/10) of one ordinary share. Each ten rights entitle the holder thereof to receive one ordinary share upon the consummation of the Business Combination. The Units were sold at an offering price of $10.00 per Unit, generating total gross proceeds of $60,000,000. On November 19, 2024, the underwriter notified the Company of its exercise of the over-allotment option in full to purchase additional 900,000 Units of the Company (the “Over-Allotment Option”). As a result, on November 21, 2024, 900,000 Units were sold to the underwriter at an offering price of $10.00 per Option Unit (the “Option Units” and together with the Units, collectively, the “Public Units”), generating gross proceeds of $9,000,000. (refer to Note 3).

Simultaneously with the consummation of the IPO and the sale of the Units, the Company consummated the private placement (“Private Placement”) of 200,000 units (the “Initial Private Units”) to the Sponsor, at a price of $10.00 per Initial Private Unit, generating total proceeds of $2,000,000, which is described in Note 4. Simultaneously with the issuance and sale of the Option Units, the Company completed a private placement sale of additional 13,500 units (the “Additional Private Units” and together with the Initial Private Units, collectively, the “Private Units”) to the Sponsor at a purchase price of $10.00 per Additional Private Unit, generating gross proceeds of $135,000.

Transaction costs amounted to aggregated total of $1,844,819, consisting of $1,035,000 of underwriting commissions which was paid in cash at the closing date of the IPO, and upon the exercise of the overallotment option, $341,602 of the Representative Shares (discussed in the below), and $468,217 of other offering costs. At the IPO date, cash of $939,635 was held outside of the Trust Account (as defined below) and is available for the payment of accrued offering costs and for working capital purposes.

In conjunction with the IPO, the Company issued to the underwriter 210,000 ordinary shares for no consideration (the “Representative Shares”). The fair value of the Representative Shares accounted for as compensation under Accounting Standards Codification (“ASC”) 718, “Compensation – Stock Compensation” (“ASC 718”) is included in the offering costs. The fair value of the Representative Shares was estimated by using Black Scholes model as of the IPO date totaled $297,045. In connection with the exercise of the underwriter’s over-allotment option, the Company issued additional 31,500 Representative Shares to the underwriter with fair value of $44,557.

The Company’s initial Business Combination must occur with one or more target businesses that together have an aggregate fair market value of at least 80% of the assets held in the Trust Account (excluding interest income earned on the Trust Account that is released to the Company to pay taxes) at the time of the agreement to enter into the initial Business Combination. However, the Company will only complete such Business Combination if the post-transaction company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act of 1940, as amended (the “Investment Company Act”). There is no assurance that the Company will be able to complete a Business Combination successfully.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

Upon the closing of the IPO, management has agreed that the net proceeds of the IPO and the sale of the Private Units, $10.00 per unit will be placed into a U.S.-based Trust Account (“Trust Account”) maintained by Wilmington Trust, N.A., acting as trustee, and will be invested only in U.S. government treasury bills with a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act which invest only in direct U.S. government treasury obligations. Except with respect to interest earned on the funds held in the Trust Account that may be released to pay the Company’s tax obligations and liquidation expenses up to $50,000, the proceeds from the IPO and the sale of the Private Units that are deposited in the Trust Account will not be released from the Trust Account until the earliest to occur of:(a) the completion of the initial Business Combination, (b) the redemption of any public shares properly submitted in connection with a shareholder vote to amend the Company’s memorandum and articles of association (i) to modify the substance or timing of the Company’s obligation to allow redemption in connection with the Business Combination or to redeem 100% of the Company’s public shares if the Company does not complete the Business Combination by June 18, 2026 (or up to February 18, 2027 if the Company extends the period of time to consummate the Business Combination by the full amount of time) as amended on February 13, 2026 pursuant to the extraordinary general meeting (the “Extension EGM”) or (ii) with respect to any other provision relating to shareholders’ rights or pre-initial Business Combination activity and (c) the redemption of the public shares if the Company is unable to complete the Business Combination by June 18, 2026 (or up to February 18, 2027 if the Company extends the period of time to consummate a Business Combination by the full amount of time) as amended on February 13, 2026 pursuant to the Extension EGM (the “Combination Period”), subject to applicable law. Although the Company will seek to have all vendors, including lenders for money borrowed, prospective target businesses or other entities the Company engages execute agreements with us waiving any right, title, interest or claim of any kind in or to any monies held in the Trust Account for the benefit of the Company’s public shareholders, the proceeds deposited in the Trust Account could become subject to the claims of the Company’s creditors, if any, which could have priority over the claims of the public shareholders.

The Company will provide its public shareholders with the opportunity to redeem all or a portion of their public shares upon the completion of the Business Combination either (i) in connection with a shareholder meeting called to approve the Business Combination or (ii) by means of a tender offer.

The ordinary shares subject to redemption accredited to the redemption value and classified as temporary equity upon the completion of the IPO, in accordance with Financial Accounting Standard Board’s (FASB) Accounting Standards Codification (“ASC”) Topic 480“Distinguishing Liabilities from Equity.” In such case, the Company has determined that the Company will proceed with a Business Combination if the Company has net tangible assets of at least $5,000,001 upon such consummation of a Business Combination and, if the Company seeks shareholder approval, a majority of the issued and outstanding shares votes are voted in favor of the Business Combination. If the Company cannot complete a Business Combination by June 18, 2026 (or up to February 18, 2027 if the Company extends the period of time to consummate a Business Combination by the full amount of time) as amended on February 13, 2026 pursuant to the Extension EGM, unless the Company extends such period pursuant to its amended and restated memorandum and articles of association, the Company will: (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the public shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest (which interest shall be net of income taxes payable, and less up to $50,000 of interest to pay liquidation expenses) divided by the number of then outstanding public shares, which redemption will completely extinguish public shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining shareholders and Board of Directors, liquidate and dissolve, subject in each case to the Company’s obligations under Cayman Islands law to provide for claims of creditors and the requirements of other applicable law. There will be no redemption rights or liquidating distributions with respect to public rights or private rights. The rights will expire worthless if the Company fails to complete a Business Combination by June 18, 2026 (or up to February 18, 2027 if the Company extends the period of time to consummate a Business Combination by the full amount of time) as amended on February 13, 2026 pursuant to the Extension EGM.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

Extension Deposit and Notes

Pursuant to the terms of the Company’s memorandum and articles of association, in order to extend the time available for the Company to consummate its initial Business Combination, the Sponsor or designees, must deposit into the Trust Account for each three months extension, $690,000 as the underwriter’s over-allotment option had been exercised in full ($0.10 per share in either case), up to an aggregate of $1,380,000, on or prior to the date of the applicable deadline. In November 2025, $690,000 was deposited into the Trust Account for the Company’s public shareholders, which extended the deadline to consummate a Business Combination to February 18, 2026.

Pursuant to the amendment to the amended and restated memorandum and articles of association approved in the extraordinary general meeting held on February 13, 2026 (the “Charter Amendment”) of the Company, the Company has until February 18, 2026 to complete its initial business combination. However, the Company may extend the period of time to consummate a business combination up to twelve times, each by an additional one-month extension, up to February 18, 2027, subject to the Sponsor and/or its designee, depositing the lesser of (i) $50,000 for all remaining public shares and (ii) $0.033 for each remaining public share (the “Extension Fee”) into the Trust Account.

For the three months ended March 31, 2026, an aggregate total of $100,000 was deposited into the Trust Account by William Wang, the Chief Executive Officer of SL BIO, on behalf of the Company’s public shareholders, to extend the deadline for the Company to consummate its initial Business Combination to April 18, 2026. In connection with such extensions, the Company issued two unsecured promissory notes (see Note 5) to William Wang, each with a principal amount of $50,000, on February 18, 2026 and March 17, 2026, respectively.

On April 18, 2026 and May 14, 2026, an aggregate total of $100,000, consisting of two installments of $50,000 each, was deposited into the Trust Account on behalf of the Company’s public shareholders to further extend the deadline for the Company to consummate its initial Business Combination to June 18, 2026. Of the aggregate amount deposited, $50,000 was funded by the Sponsor and $50,000 was funded by William Wang. In connection with such extensions, the Company issued unsecured promissory notes with a principal amount of $50,000 each on April 18, 2026 and May 18, 2026 to the Sponsor and William Wang, respectively.

Business Combination

On May 9, 2025, the Company entered into a business combination agreement (the “Business Combination Agreement”) with SL Science Holding Limited, a Cayman Islands exempted company (“PubCo”), CW Mega Limited, a Cayman Islands exempted company and a wholly-owned subsidiary of PubCo (“Merger Sub I”), WW Century Limited, a Cayman Islands exempted company and a wholly-owned subsidiary of PubCo (“Merger Sub II”), and SL Bio Ltd., a Cayman Islands exempted company limited by shares (“SL Bio”), pursuant to which, among other things, (i) Merger Sub I will merge with and into the Company, with the Company as the surviving entity and a wholly-owned subsidiary of PubCo (the “First Merger”), and (ii) following the First Merger, Merger Sub II will merge with and into SL Bio, with SL Bio as the surviving entity and a wholly-owned subsidiary of PubCo (the “Second Merger,” and together with the First Merger and the other transactions contemplated by the Business Combination Agreement, the “SL Bio Business Combination”). In connection with the SL Bio Business Combination, PubCo filed with the SEC a registration statement on Form F-4 (File No. 333-292214), which was declared effective on January 13, 2026 (as amended and supplemented, the “Form F-4”), and the Company filed a definitive proxy statement (as amended and supplemented, the “Proxy Statement”) for the solicitation of proxies in connection with an extraordinary general meeting of the Company’s shareholders on January 13, 2026.

On May 9, 2025, the Company entered into a Business Combination Agreement with SL Science Holding Limited (“PubCo”), its wholly owned subsidiaries, and SL BIO Ltd., pursuant to which a series of mergers will be effected resulting in the Company and SL BIO becoming wholly owned subsidiaries of PubCo, and the Company’s shareholders receiving PubCo ordinary shares. In connection with the Business Combination, on March 24, 2026, PubCo entered into subscription agreements with certain investors for a private placement (the “PIPE Financing”) of 780,000 units at $10.00 per unit for aggregate gross proceeds of $7,800,000. Each unit consists of one PubCo ordinary share and one preferred share, with each preferred share convertible into one-third of one PubCo ordinary share six months following the closing of the Business Combination.

Going Concern Consideration

As of March 31, 2026, the Company had cash of $9,586 and working capital deficit of $1,784,554, excluding $37,482,848 payables due to redeeming shareholders to be paid out from the Trust Account. The Company has incurred and expects to continue to incur significant professional costs to remain as a publicly traded company and to incur significant transaction costs in pursuit of the consummation of a Business Combination.

The Company expects to continue to incur significant professional costs to remain as a publicly traded company and to incur significant transaction costs in pursuit of the consummation of a Business Combination. The Company may need to obtain additional financing either to complete its Business Combination or because it becomes obligated to redeem a significant number of public shares upon consummation of its Business Combination, in which case, subject to compliance with applicable securities laws, the Company may issue additional securities or incur debt prior to or in connection with such Business Combination.

In connection with the Company’s assessment of going concern considerations in accordance with ASC Subtopic 205-40, Presentation of Financial Statements - Going Concern, management has determined that these conditions raise substantial doubt about the Company’s ability to continue as a going concern. Management’s plan in addressing this uncertainty is through the Working Capital Loans, as defined below (see Note 6). Accordingly, the Company may not be able to obtain additional financing. If the Company is unable to raise additional capital, it may be required to take additional measures to conserve liquidity, which could include, but not necessarily be limited to, curtailing operations, suspending the pursuit of a potential transaction, and reducing overhead expenses. The Company cannot provide any assurance that new financing will be available to it on commercially acceptable terms, if at all.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

The Company has incurred and expects to continue to incur significant costs in pursuit of its financing and acquisition plans. The Company currently has no commitments in place to receive such financing and there is no assurance that the Company’s plans to raise capital will be successful. In addition, if the Company is unable to complete a Business Combination by June 18, 2026 (or up to February 18, 2027 if fully extended), unless further extended, the Company’s board of directors would proceed to commence a voluntary liquidation and thereby a formal dissolution of the Company. There is no assurance that the Company’s plans to consummate a Business Combination will be successful within the Combination Period. As a result, management has determined that such additional condition also raise substantial doubt about the Company’s ability to continue as a going concern for a period within one year after the date that the accompanying unaudited condensed financial statements are issued. The unaudited condensed financial statements of the Company do not include any adjustments that might result from the outcome of this uncertainty.

Risks and Uncertainties

As a result of the ongoing Russia/Ukraine, Hamas/Israel conflicts and/or other future global conflicts, the Company’s ability to consummate a Business Combination, or the operations of a target business with which the Company ultimately consummates a Business Combination, may be materially and adversely affected. In addition, the Company’s ability to consummate a transaction may be dependent on the ability to raise equity and debt financing which may be impacted by these events, including as a result of increased market volatility, or decreased market liquidity in third-party financing being unavailable on terms acceptable to the Company or at all. The impact of this action and potential future sanctions on the world economy and the specific impact on the Company’s financial position, results of operations or ability to consummate a Business Combination are not yet determinable. The unaudited condensed financial statements of the Company do not include any adjustments that might result from the outcome of this uncertainty.

Note 2 — Significant accounting policies

Basis of Presentation

The accompanying unaudited condensed financial statements are presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Interim results are not necessarily indicative of results to be expected for any other interim period or for the full year. The information included in this Form 10-Q should be read in conjunction with information included in the Company’s annual report on Form 10-K for the year ended December 31, 2025, filed with the SEC on April 8, 2026. The accompanying balance sheet as of December 31, 2025 has been derived from the Company’s audited financial statements included in Form 10-K.

Segment Reporting

ASC Topic 280, “Segment Reporting,” establishes standards for companies to report in their financial statement information about operating segments, products, services, geographic areas, and major customers. Operating segments are defined as components of an enterprise for which separate financial information is available that is regularly evaluated by the Company’s chief operating decision maker, or group, in deciding how to allocate resources and assess performance.

The Company’s chief operating decision maker has been identified as the Chief Executive Officer (“CODM”), who reviews the operating results for the Company as a whole to make decisions about allocating resources and assessing financial performance. Accordingly, management has determined that the Company only has one operating segment.

When evaluating the Company’s performance and making key decisions regarding resource allocation, the CODM reviews several key metrics, formation and operational costs and interest earned on cash and investments held in Trust Account which are included in the accompanying consolidated statements of operations.

The key measures of segment profit or loss reviewed by our CODM are interest earned on investment in Trust Account and formation and operating expenses. The CODM reviews interest earned on investment in Trust Account to measure and monitor shareholder value and determine the most effective strategy of investment with the Trust Account funds while maintaining compliance with the trust agreement. Within formation and operating costs, the CODM specifically reviews professional service fees in connection with the business combination, which are a significant segment expense, and include legal fees, and advisory fees, as these represent significant costs affecting the Company’s consummation of the Business Combination. Other formation and operating costs, including accounting expenses, printing expenses, and regulatory filing fees, are reviewed in aggregate to ensure alignment with budget and contractual obligations. These expenses are monitored to manage and forecast cash available to complete a business combination within the required period.

Emerging Growth Company Status

The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act of 1933, as amended, (the “Securities Act”), as modified by the Jumpstart The Company’s Business Startups Act of 2012, (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in its periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and shareholder approval of any golden parachute payments not previously approved.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

Further, Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such an election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This may make comparison of the Company’s financial statements with another public company which is neither an emerging growth company nor an emerging growth company which has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.

Use of Estimates

The preparation of the unaudited condensed financial statements of the Company in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the unaudited condensed financial statements and the reported amounts of expenses during the reporting period.

Making estimates requires management to exercise significant judgment. It is at least reasonably possible that the estimate of the effect of a condition, situation or set of circumstances that existed at the date of the unaudited condensed financial statements, which management considered in formulating its estimate, could change in the near term due to one or more future confirming events. Accordingly, the actual results could differ significantly from those estimates.

Cash and Cash Equivalents

The Company considers all short-term investments with an original maturity of three months or less when purchased to be cash equivalents. The Company had $9,586 and $7,917 in cash as of March 31, 2026 and December 31, 2025, respectively, and did not have any cash equivalents as of March 31, 2026 and December 31, 2025.

Investment Held in Trust Account

The Company’s portfolio of investments held in the Trust Account is comprised of an investment in money market fund that invest in U.S government treasury obligations and generally have a readily determinable fair value. Gains and losses resulting from the change in fair value of these securities are included in income on Trust Account in the accompanying statement of operations. The estimated fair values of investments held in the Trust Account are determined using available market information.

In connection with the extraordinary general meeting (the “Business Combination EGM”) in connection with the SL Bio Business Combination on February 13, 2026, an aggregate of 3,219,311 ordinary shares of the Company were redeemed for $34,221,276 on March 17, 2026.

As of March 31, 2026 and December 31, 2025, the Trust Account had balance of $39,390,860 and $72,924,060, respectively. During the three months ended March 31, 2026, 3,219,311 ordinary shares of the Company were redeemed by public shareholders. In connection with the redemptions, an aggregate of $34,221,276 was withdrawn from the Trust Account and paid to the public shareholders. Earnings on these trading securities are included in interest earned on investments held in the Trust Account in the accompanying statements of operations. Income earned on these investments were fully reinvested into the Trust and therefore considered as an adjustment to reconcile net income (loss) to net cash used in operating activities in the condensed statements of cash flows. For the three months ended March 31, 2026 and 2025, there were $588,076 and 726,071 of interest and dividend income recognized, respectively.

Net Income (Loss) Per Ordinary Share

The Company complies with accounting and disclosure requirements of FASB ASC 260, Earnings Per Share. In order to determine the net income (loss) attributable to both the redeemable shares and non-redeemable shares, the Company first considered the undistributed income (loss) allocable to both the redeemable shares and non-redeemable shares and the undistributed income (loss) is calculated using the total net loss less interest income and unrealized gain or loss on investments in trust account less any dividends paid. The Company then allocated the undistributed income (loss) ratably based on the weighted average number of shares outstanding between the redeemable and non-redeemable shares. Any remeasurement of the accretion to redemption value of the ordinary shares subject to possible redemption was considered to be dividends paid to the public shareholders.

For the three months ended March 31, 2026 and December 31, 2025, the Company had 3,502,404 and nil mandatorily redeemable ordinary shares outstanding, respectively, which will be redeemed upon and following the consummation of the Business Combination. The mandatorily redeemable ordinary shares contain a right to dividends and hence are considered as participating securities. The two-class method was applied to compute basic net income (loss) attributable to the redeemable shares.

As of March 31, 2026 and December 31, 2025, the Company did not have any dilutive securities and other contracts that could, potentially, be exercised or converted into ordinary shares and then shared in the earnings of the Company. As a result, diluted income (loss) per share is the same as basic loss per share for the period presented.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

The net income (loss) per share presented in the statement of operations is based on the following:

	For the three months ended March 31, 2026			For the three months ended March 31, 2025

Net (loss) income	$	(29,122	)	$	472,592
Accretion of carrying value to redemption value		(435,783	)		(726,071	)
Net loss including accretion of carrying value of redemption value	$	(464,905	)	$	(253,479	)

	For the Three Months Ended
	March 31, 2026
				Non-
	Redeemable			Redeemable
	Common			Common
	Stock			Stock
Basic and diluted net income (loss) per share:
Numerators:
Allocation of net loss including carrying value to redemption value	$	(328,583	)	$	(136,222	)
Net loss attributable to ordinary shares subject to redemption		12,675
Accretion of carrying value to redemption value		435,783			-
Allocation of net income (loss)	$	119,875		$	(136,222	)

Denominators:
Weighted-average shares outstanding		1,752,170			2,180,000
Basic and diluted net income (loss) per share	$	0.07		$	(0.06	)

	For the Three Months Ended
	March 31, 2025
				Non-
	Redeemable			Redeemable
	Common			Common
	Stock			Stock
Basic and diluted net income (loss) per share:
Numerators:
Allocation of net loss including carrying value to redemption value	$	(192,622	)	$	(60,857	)
Accretion of carrying value to redemption value		726,071			-
Allocation of net income (loss)	$	533,449		$	(60,857	)

Denominators:
Weighted-average shares outstanding		6,900,000			2,180,000
Basic and diluted net income (loss) per share	$	0.08		$	(0.03	)

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

Ordinary shares Subject to Redemption

The Company accounts for ordinary shares subject to redemption in accordance with ASC Topic 480 “Distinguishing Liabilities from Equity.” Upon the occurrence of the redemption event, or when the redemption became unconditional and no longer contingent, the ordinary shares subject to redemption were reclassified from temporary equity to liabilities in accordance with ASC 480-10-25-7. Upon reclassification, the liability was initially measured at fair value in accordance with ASC 480-10-30-2, with no gain or loss recognized upon reclassification.

Subsequent to reclassification, the liability is measured in accordance with ASC 480-10-35. If the instrument requires the repurchase of a fixed number of the Company’s ordinary shares and both the settlement amount and settlement date are fixed, the liability is subsequently measured at the present value of the amount to be paid at settlement using the effective interest method. If either the settlement amount or settlement date varies based on specified conditions, the liability is subsequently measured at the amount of cash that would be payable if settlement occurred as of the reporting date, with changes in measurement recognized as interest cost.

In connection with the Business Combination EGM held on February 12, 2026, 3,502,404 ordinary shares of the Company were submitted for redemption, which will be redeemed upon and following the consummation of the Business Combination. Because the redeeming shareholders had submitted valid redemption notices and the approval of the Business Combination occurred on February 12, 2026, the redemption became unconditional on February 12, 2026. Accordingly, the Company reclassified 3,502,404 ordinary shares previously classified as ordinary shares subject to possible redemption from temporary equity to liabilities, which were initially measured at fair value upon reclassification, amounting to $37,230,555 ($10.63 per share). Since the settlement dates are varies depending on the consummation of the Business Combination, the liability is subsequently measured at the amount of cash that would be paid if settlement occurred at the reporting date, with changes in the measurement recognized as interest cost. Accordingly, the Company recognized interest expense of $252,293, and the ordinary shares subject to redemption liability were remeasured to $37,482,848 as of March 31, 2026.

Ordinary shares Subject to Possible Redemption

The Company accounts for its ordinary shares subject to possible redemption in accordance with the guidance in ASC Topic 480 “Distinguishing Liabilities from Equity.” Ordinary shares subject to mandatory redemption (if any) are classified as a liability instrument and are measured at fair value. Conditionally redeemable ordinary shares (including ordinary shares that feature redemption rights that are either within the control of the holder or subject to redemption upon the occurrence of uncertain events not solely within the Company’s control) are classified as temporary equity. At all other times, ordinary shares are classified as shareholders’ equity. The Company’s public shares feature certain redemption rights that are outside of the Company’s control and subject to occurrence of uncertain future events.

In connection with the Business Combination EGM on February 12, 2026, 3,502,404 ordinary shares of the Company were submitted for redemption, which will be redeemed upon and following the consummation of the Business Combination. Upon the approval of the Business Combination EGM on February 12, 2026, the redemption became unconditional, and the related ordinary shares were reclassified from temporary equity to liabilities in accordance with ASC 480.

In connection with the Business Combination EGM on February 13, 2026, an aggregate of 3,219,311 ordinary shares of the Company were redeemed to $34,221,276 on March 17, 2026.

Accordingly, as of March 31, 2026 and December 31, 2025, 178,285 and 6,900,000 ordinary shares subject to possible redemption are presented at the redemption value as temporary equity, outside of the shareholders’ equity section of the Company’s balance sheet. The Company recognizes changes in redemption value immediately as they occur and adjusts the carrying value of redeemable common stock to equal the redemption value at the end of each reporting period. Increases or decreases in the carrying amount of redeemable common stock are affected by charges against additional paid in capital and accumulated deficit.

Share Rights

The Company accounts for the Public Rights and private placement rights issued in connection with the IPO and the Private Placement in accordance with the guidance contained in FASB ASC Topic 815, “Derivatives and Hedging”. Accordingly, the Company evaluated and classified the rights under equity treatment at their assigned values.

Share-Based Compensation

The Company accounts for the share-based compensation issued to the underwriter under Accounting Standards Codification (“ASC”) 718, “Compensation – Stock Compensation” (“ASC 718”) is included in the offering costs.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentration of credit risk consist of cash accounts in a financial institution, which, at times, may exceed the Federal Depository Insurance Coverage of $250,000. As of March 31, 2026 and December 31, 2025, the Company has not experienced losses on these accounts and management believes the Company is not exposed to significant risks on such accounts.

Fair Value of Financial Instruments Measurements

The fair value of the Company’s assets and liabilities, which qualify as financial instruments under ASC Topic 820, “Fair Value Measurement,” approximates the carrying amounts represented in the accompanying balance sheet, primarily due to their short-term nature.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

The Company applies ASC 820, which establishes a framework for measuring fair value and clarifies the definition of fair value within that framework. ASC 820 defines fair value as an exit price, which is the price that would be received for an asset or paid to transfer a liability in the Company’s principal or most advantageous market in an orderly transaction between market participants on the measurement date. The fair value hierarchy established in ASC 820 generally requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Observable inputs reflect the assumptions that market participants would use in pricing the asset or liability and are developed based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the entity’s own assumptions based on market data and the entity’s judgments about the assumptions that market participants would use in pricing the asset or liability and are to be developed based on the best information available in the circumstances. The fair value hierarchy is categorized into three levels based on the inputs as follows:

·	Level 1 - Valuations based on unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not being applied. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these securities does not entail a significant degree of judgment.

·	Level 2 - Valuations based on (i) quoted prices in active markets for similar assets and liabilities, (ii) quoted prices in markets that are not active for identical or similar assets, (iii) inputs other than quoted prices for the assets or liabilities, or (iv) inputs that are derived principally from or corroborated by market through correlation or other means.

·	Level 3 - Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

As of March 31, 2026 and December 31, 2025, the assets held in the Trust Account were held in treasury funds. All of the Company’s investments held in the Trust Account are classified as trading securities.

The following table presents information about the Company’s assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2026 and December 31, 2025 and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine such fair value.

March 31, 2026

December 31, 2025

(Unaudited)

Level

Fair value

Level

Fair value

Assets:

Investments held in Trust Account

39,390,860

72,924,060

Income Taxes

The Company accounts for income taxes under ASC740 Income Taxes (“ASC 740”). ASC 740 requires the recognition of deferred tax assets and liabilities for both the expected impact of differences between the financial statements and tax basis of assets and liabilities and for the expected future tax benefit to be derived from tax loss and tax credit carry forwards. ASC 740 additionally requires a valuation allowance to be established when it is more likely than not that all or a portion of deferred tax assets will not be realized.

ASC 740 also clarifies the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements and prescribes a recognition threshold and measurement process for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not to be sustained upon examination by taxing authorities. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim period, disclosure and transition. The Company has identified Cayman Islands as its only “major” tax jurisdiction, as defined. Based on the Company’s evaluation, it has been concluded that there are no significant uncertain tax positions requiring recognition in the Company’s unaudited condensed financial statements. Since the Company was incorporated on March 21, 2023, the evaluation was performed for 2023, 2024, and 2025 tax year which will be the only periods subject to examination. The Company believes that its income tax positions and deductions would be sustained on audit and does not anticipate any adjustments that would result in a material change to its financial position. The Company’s policy for recording interest and penalties associated with audits is to record such items as a component of income tax expense.

The Company may be subject to potential examination by foreign taxing authorities in the area of income taxes. These potential examinations may include questioning the timing and amount of deductions, the nexus of income among various tax jurisdictions and compliance with foreign tax laws.

The Company’s tax provision was deemed to be de minimis for the period presented. The Company is considered to be an exempted Cayman Islands Company and is presently not subject to income taxes or income tax filing requirements in the Cayman Islands or the United States.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

Related parties

Parties, which can be a corporation or individual, are considered to be related if the Company has the ability, directly or indirectly, to control the other party or exercise significant influence over the other party in making financial and operational decisions. Companies are also considered to be related if they are subject to common control or common significant influence.

Recently issued accounting standards which have not yet been adopted

In November 2024, the FASB issued ASU 2024-03, “Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures” (“ASU 2024-03”), which requires disaggregated disclosure of certain costs and expenses, including purchases of inventory, employee compensation, depreciation, amortization and depletion, in each relevant expense caption. ASU 2024-03 is effective for fiscal years beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption and retrospective application is permitted. The Company is currently assessing the impact of this guidance; however, the Company does not expect a material impact on its unaudited condensed financial statements.

In December 2025, the FASB issued ASU 2025-11, “Interim Reporting (Topic 270),” which clarifies the applicability of interim reporting guidance and provides a comprehensive list of interim disclosures required under GAAP. The amendments also introduce a disclosure principle requiring entities to disclose events occurring since the end of the last annual reporting period that have a material impact on the entity. The guidance is effective for interim reporting periods within annual reporting periods beginning after December 15, 2027 for public business entities, and after December 15, 2028 for entities other than public business entities. Early adoption is permitted, and the amendments may be applied prospectively or retrospectively. The Company is currently evaluating the impact of adopting this guidance on its unaudited condensed consolidated financial statements.

Except as mentioned above, the Company does not believe other recently issued but not yet effective accounting standards, if currently adopted, would have a material effect on the on the Company’s unaudited condensed financial statements.

Note 3 — Initial Public Offering

On November 18, 2024, the Company sold 6,000,000 Units, at a price of $10.00 per Unit. Each Unit consists of one ordinary share, and one right to receive one-tenth (1/10) of one ordinary share. Each ten rights entitle the holder thereof to receive one ordinary share upon the consummation of the Business Combination. The Company has also granted the underwriters a 45-day option to purchase up to an additional 900,000 Option Units to cover over-allotments, if any. On November 19, 2024, the underwriter notified the Company of its exercise of the over-allotment option in full to purchase additional 900,000 Option Units of the Company. On November 21, 2024, 900,000 Option Units were sold to the underwriter at an offering price of $10.00 per Option Unit, generating gross proceeds of $9,000,000. As of the date of March 31, 2026 and December 31, 2025, 142,091 and 343,933 public placement units have not been separated into their relevant components, respectively.

All of the 6,900,000 public shares sold as part of the Public Units in the IPO contain a redemption feature which allows for the redemption of such public shares if there is a stockholder vote or tender offer in connection with the Business Combination and in connection with certain amendments to the Company’s amended and restated memorandum and articles of association, or in connection with the Company’s liquidation. In accordance with the Securities and Exchange Commission (the “SEC”) and its staff’s guidance on redeemable equity instruments, which has been codified in ASC 480-10-S99, redemption provisions not solely within the control of the Company require common stock subject to redemption to be classified outside of permanent equity.

The Company’s redeemable ordinary share is subject to SEC and its staff’s guidance on redeemable equity instruments, which has been codified in ASC 480-10-S99. If it is probable that the equity instrument will become redeemable, the Company has the option to either accrete changes in the redemption value over the period from the date of issuance (or from the date that it becomes probable that the instrument will become redeemable, if later) to the earliest redemption date of the instrument or to recognize changes in the redemption value immediately as they occur and adjust the carrying amount of the instrument to equal the redemption value at the end of each reporting period. The Company has elected to recognize the changes immediately. The accretion or remeasurement is treated as a deemed dividend (i.e., a reduction to retained earnings, or in absence of retained earnings, additional paid-in capital).

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

As of March 31, 2026 and December 31, 2025, the amounts of ordinary shares reflected on the balance sheet are reconciled in the following table.

	Share			Amount
Gross proceeds from the IPO		6,900,000		$	69,000,000
Less:
Gross Proceeds from the IPO allocated to public rights		-			(903,900	)
Offering costs of public shares		-			(1,806,783	)
Plus:
Initial accretion of carrying value to redemption value		-			2,710,683
Accretion of carrying value to redemption value		-			3,924,060
Ordinary shares subject to possible redemption, December 31, 2025		6,900,000		$	72,924,060
Less:
Redemption of Ordinary Shares		(3,219,311	)		(34,221,276	)
Reclassification of ordinary share subject to redemption as liability		(3,502,404	)		(37,230,555	)
Plus: Accretion of carrying value to redemption value		-			435,783
Ordinary shares subject to possible redemption, March 31, 2026		178,285		$	1,908,012

Note 4 — Private Placement

Simultaneously with the closing of the IPO, the Sponsor purchased an aggregate of 200,000 Initial Private Units at a price of $10.00 per Initial Private Units for an aggregate purchase price of $2,000,000. Each Initial Private Unit was identical to the Public Units sold in the IPO, except as described below. Simultaneously with the closing of the Option Units on November 21, 2024, the Company consummated the sale of additional 13,500 Additional Private Units to the Sponsor at a price of $10.00 per Additional Private Unit, generating total proceeds of $135,000. As of March 31, 2026 and December 31, 2025, 213,500 private placement units have not been separated into their relevant components.

The Sponsor has agreed to waive its redemption rights with respect to its Private Placement shares (i) in connection with the consummation of a Business Combination, (ii) in connection with a shareholder vote to amend the Company’s amended and restated memorandum and articles of association to modify the substance or timing of the Company’s obligation to allow redemption in connection with the Company’s initial Business Combination or to redeem100% of the Company’s public shares if the Company does not complete the Company’s initial Business Combination within the Combination Period, and (iii) if the Company fails to consummate a Business Combination within the Combination Period or if the Company liquidates prior to the expiration of the Combination Period. However, the Sponsor will be entitled to redemption rights with respect to any public shares held by it if the Company fails to consummate a Business Combination or liquidate within the Combination Period.

The Sponsor has agreed not to transfer, sell or assign the Private Units and the underlying securities until the consummation of the Company’s initial Business Combination.

Note 5 — Promissory Notes — Third Party

On February 18, 2026 and March 17, 2026, the Company issued two unsecured promissory notes in the aggregate principal amount of $100,000 to William Wang, the Chief Executive Officer of SL BIO to fund the extension fees associated with extending the deadline for the Company to consummate a Business Combination. The terms of the promissory notes are substantially the same as the related party promissory note described below. As of March 31, 2026, the outstanding balance under the promissory notes - third party was $100,000.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

Note 6— Related Party Transactions

Founder Shares

On March 21, 2023, the Company issued 1 ordinary share of a par value of $0.0001 to the Sponsor without consideration. On July 26, 2024, the Sponsor acquired 1,725,000 ordinary shares (“Founder Shares”) for a purchase price of $25,000, or approximately $0.0145 per share and surrendered 1 ordinary share, all share amounts have been retroactively restated to reflect this issuance and surrender of 1 ordinary share. On August 2, 2024, Sponsor transferred (i) to each independent director nominee 20,000 Founder Shares, in the aggregate amount of 60,000 Founder shares, and (ii) to Chief Financial Officer, 10,000 Founder Shares, all at the original purchase price of $0.0145 per share when the Sponsor acquired such shares.

As of November 18, 2024, there were 1,725,000 Founder Shares issued and outstanding, amount with up to 225,000 Founder Shares are subject to forfeiture if the underwriters’ over-allotment is not exercised. On November 21, 2024, the underwriters exercised their over-allotment option in full, all 225,000 Founder Shares were no longer subject to forfeiture.

The Founder Shares are designated as ordinary shares and are identical to the Private Placement shares except for the following (a) the Founder Shares must be voted in favor of any proposed Business Combination and cannot vote for amendments that would prevent public shareholders from converting or selling their shares in connection with a Business Combination, (b) the Founder Shares cannot be converted into cash from the Trust Account in connection with a shareholder vote to approve the initial Business Combination or amend shareholders’ rights or pre-Business Combination activity. They do not participate in liquidating distributions if a Business Combination is not consummated; and (c) the Founder Shares cannot be transferred, assigned, or sold until the earlier of nine months after the initial Business Combination or upon certain triggering events (e.g., liquidation, merger). If the share price exceeds $12.00 for 20 out of 30 trading days post-Business Combination, the lock-up is released.

Promissory Notes — Related Parties

On July 25, 2024, the Company entered into a promissory note agreement (“Promissory Note Agreement”), pursuant which the Sponsor agreed to loan the Company up to $500,000 to be used for a portion of the expenses of the IPO. As of March 31, 2026 and December 31, 2025, the Company had not drawn any amounts under the Promissory Note Agreement.

On July 5, 2025, the Company issued unsecured promissory notes in the principal amount of $300,000 to its Sponsor to provide additional working capital. The promissory notes bear no interest and are payable upon the earlier of the consummation of a Business Combination or the Company’s termination date. At the Sponsor’s discretion, the promissory notes may be converted into private placement units upon completion of the Business Combination at a conversion price of $10.00 per unit, with each unit consisting of one ordinary share and one right. The proceeds from the $300,000 promissory notes were funded via wire transfer on July 7, 2025.

On November 17, 2025, an aggregate of $690,000 of the extension fee was deposited into the Trust Account for the Company’s public shareholders (the “Extension Payment”) by a designee of the Sponsor (the “Payee”), which enables the Company to extend the period of time it has to consummate its initial business combination by three months from November 18, 2025 to February 18, 2026. In connection with such extension fee, the Company issued an unsecured promissory note of $690,000 (the “Note”) to the Payee. At the Payee’s discretion, the promissory note may be converted into private placement units upon completion of the Business Combination at a conversion price of $10.00 per unit, each consisting of one ordinary share and one right.

As of March 31, 2026 and December 31, 2025, the outstanding balance under the promissory notes – related parties amounted to $990,000.

Amount Due to Related Party

Amount due to related party represents advancement made by the sponsor to the Company to pay formation expenses, a portion of the expenses of the IPO, and the Company’s ongoing operational expense. As of March 31, 2026 and December 31, 2025, the Company had amount due to related party amounted to $571,134 and $354,484, respectively.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

Working Capital Notes

In addition, in order to meet with the Company’s working capital needs following the consummation of this offering or to extend the Company’s life, the Company’s founders, officers and directors or their affiliates/designees may, but are not obligated to, loan the Company funds, from time to time or at anytime, in whatever amount they deem reasonable in their sole discretion. The notes would either be paid upon consummation of our initial Business Combination, without interest, or, at the lender’s discretion, up to $2,500,000 of the notes may be converted upon consummation of our Business Combination into working capital units (“the Working Capital Units”) at a price of $10.00 per unit in addition to the convertible notes in connection with the potential extensions.

On May 18, 2026, the Company issued a promissory note (the “Working Capital Note”) to the Sponsor, under which the Sponsor agreed to loan the Company up to $850,000 to be used for a portion of the working capital. This loan is non-interest bearing, unsecured and is due at the earlier of (i) the consummation of the Company’s initial business combination or (ii) the date of expiry of the term of the Company. The Sponsor, as the payee, has the right, but not the obligation, to convert the note, in whole or in part, into Working Capital Units of the Company, that are identical to the Private Units issued by the Company in the Private Placement consummated simultaneously with the Company’s IPO, subject to certain exceptions, by providing the Company with written notice of the intention to convert at least two business days prior to the closing of a business combination. The number of Working Capital Units to be received by the Sponsor in connection with such conversion shall be an amount determined by dividing (x) the sum of the outstanding principal amount payable to the Sponsor by (y) $10.00.

Administrative Support Services

Commencing on the date that the Company’s securities are first listed on NASDAQ through the earlier of consummation of the Company’s initial Business Combination and liquidation, the Company will pay an affiliate of Sponsor a total of $10,000 per month for office space, administrative and support services.

On February 5, 2025, upon the approval of the Board and Audit Committee of the Company, the Company and the Sponsor agreed to waive full payment of the Administrative Service Fee.

Note 7 — Commitments & Contingencies

Registration Rights

The holders of the Founder Shares and private units, units issuable upon the conversion of certain working capital notes and any underlying securities will be entitled to registration rights pursuant to a registration rights agreement to be signed prior to or on the effective date of this offering requiring the Company to register such securities for resale. In addition, the holders have certain “piggy-back” registration rights with respect to registration statements filed subsequent to our completion of our initial business combination and rights to require us to register for resale such securities pursuant to Rule 415 under the Securities Act. The Company will bear the expenses incurred in connection with the filing of any such registration statements.

Underwriters Agreement

The Company had granted the underwriter a 45-day option from the date of the IPO to purchase up to an additional 900,000 Option Units to cover over-allotments, if any. On November 21, 2024, the underwriters exercised the over-allotment option in full. The Company has agreed to pay an underwriting discount of 1.5% of the gross proceeds of the IPO, or $900,000 (or up to $1,035,000 if the underwriters’ over-allotment is exercised in full) to the underwriters at the closing of the IPO in addition to the issuance of the Representative Shares. $900,000 was paid at the closing of the IPO on November 18, 2024. In connection with the issuance and sales of the Option Units, additional $135,000 was paid on November 21, 2024.

Representative Shares

The Company has agreed to issue to the underwriter 210,000 Representative Shares (or up to 241,500 Representative Shares if the underwriters’ over-allotment option is exercised in part or in full), upon the consummation of the IPO. These shares were registered in the registration statement on Form S-1 in connection with the IPO. In connection with the IPO, the Company issued 210,000 Representative Shares to the underwriter with a fair value of $297,045. In connection with the issuance and sales of the Option Units, the Company issued additional 31,500 Representative Shares to the underwriter with a fair value of $44,557.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

The underwriter has agreed not to transfer, assign or sell any Representative Shares until the completion of the Company’s initial Business Combination. In addition, the underwriter has agreed (i) to waive its redemption rights with respect to such shares in connection with the completion of the Company’s initial Business Combination and (ii) to waive its rights to liquidating distributions from the Trust Account with respect to such shares if the Company fails to complete its initial Business Combination within the periods of time.

The Representative Shares are subject to a lock-up for a period of 180 days immediately following the commencement of sales of this offering pursuant to FINRA Rule 5110(e)(1). Pursuant to this FINRA lock-up, these securities cannot be sold, transferred, assigned, pledged or hypothecated or the subject of any hedging, short sale, derivative, put or call transaction that would result in the economic disposition of the securities by any person for a period of 180 days from the commencement of sales of this offering except as permitted under FINRA Rule 5110(e)(2), including to any underwriter and selected dealer participating in the offering and their officers or partners, registered persons or affiliates. These securities have resale registration rights including three demand (one at the Company’s expense and two at the underwriter’s expense) and unlimited “piggy-back” rights at any time, and from time to time.

Note 8 — Shareholders’ Equity

Preference Share

The Company is authorized to issue 10,000,000 shares of preferred share, with a par value of $0.0001 per share with such designations, voting and other rights and preferences as may be determined from time to time by the Company’s board of directors. As of March 31, 2026 and December 31, 2025, there were no preference shares issued or outstanding.

Ordinary Share

The Company is authorized to issue 490,000,000 ordinary shares, with a par value of $0.0001 per share.

On March 21, 2023, the Company issued one ordinary share of a par value of $0.0001 to the Sponsor without consideration.

On July 26, 2024, the Sponsor acquired 1,725,000 Founder Shares (up to 225,000 of which are subject to forfeiture) at a price of approximately 0.0145 per share for an aggregate of $25,000 and surrendered one ordinary share. All share amounts have been retroactively restated to reflect this issuance. On August 2, 2024, Sponsor transferred (i) to each independent director nominee 20,000 Founder Shares, in the aggregate amount of 60,000 Founder Shares, and (ii) to Chief Financial Officer, 10,000 Founder Shares, all at the original purchase price when the Sponsor acquired such shares. Those shares issuance and cancelation were considered as a recapitalization, which were recorded and presented retroactively. As a result of the underwriters’ election to fully exercise their over-allotment option on November 19, 2024, no Founder Shares are currently subject to forfeiture

As of March 31, 2026 and December 31, 2025, there were 2,180,000 ordinary shares issued and outstanding, excluding 3,502,404 shares subject to redemption and 178,285 shares subject to possible redemption as of March 31, 2026, and 6,900,000 shares subject to possible redemption as of December 31, 2025.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

Shareholders of ordinary shares are entitled to one vote for each share held on all matters to be voted on by shareholders. Unless specified in the Company’s amended and restated memorandum and articles of association, or as required by applicable provisions of the Companies Act or applicable share exchange rules, the affirmative vote of a majority of the Company’s issued and outstanding ordinary shares that are voted at a shareholder meeting (in person or by proxy) is required to approve any such matter voted on by the Company’s shareholders. Approval of certain actions will require a special resolution under Cayman Islands law and pursuant to the Company’s amended and restated memorandum and articles of association; such actions include amending the Company’s amended and restated memorandum and articles of association and approving a statutory merger or consolidation with another company.

The Company’s board of directors will be divided into three classes, each of which will generally serve for a term of three years with only one class of directors being elected in each year. There is no cumulative voting with respect to the election of directors, with the result that the holders of more than 50% of the shares voted for the election of directors can elect all of the directors. The Company’s shareholders are entitled to receive ratable dividends when, as and if declared by the board of directors out of funds legally available therefor.

Rights

As of March 31, 2026 and December 31, 2025, there were 7,113,500 rights outstanding, 6,900,000 of which are publicly traded. Among these, 213,500 rights were issued as part of 213,500 Private Units, which have not yet been separated.

Each holder of a right will automatically receive one-tenth (1/10) of one ordinary share upon consummation of the Company initial Business Combination, even if the holder of such right redeemed all ordinary shares held by it in connection with the initial Business Combination or an amendment to the Company’s amended and restated memorandum and articles of association with respect to our pre-business combination activities. In the event the Company will not be the surviving company upon completion of its initial Business Combination, each right will automatically be converted to receive the kind and amount of securities or properties of the surviving entity that each one-tenth of an ordinary share underlying each right is entitled to upon consummation of the Business Combination, subject to any dissenter rights under the applicable law. No additional consideration will be required to be paid by a holder of rights in order to receive its additional ordinary shares upon consummation of an initial Business Combination. The shares issuable upon the conversion of the rights will be freely tradable (except to the extent held by the Company’s affiliates). If the Company enters into a definitive agreement for a Business Combination in which the Company will not be the surviving entity, the definitive agreement will provide for the holders of rights to receive the same per share consideration the holders of the ordinary shares will receive in the transaction on an as-converted into ordinary shares basis.

The Company will not issue fractional shares in connection with a conversion of rights. Fractional shares will either be rounded down to the nearest whole share or otherwise addressed in accordance with the applicable provisions of the Companies Act and any other applicable law. As a result, the holders hold rights in multiples of ten in order to receive shares for all of your rights upon closing of a business combination. If the Company is unable to complete an initial business combination within the required time period and liquidate the funds held in the Trust Account, holders of rights will not receive any of such funds with respect to their rights, nor will they receive any distribution from the Company’s assets held outside of the Trust Account with respect to such rights, and the rights will expire worthless. Additionally, in no event will be required to net cash settle the rights. Accordingly, the rights may expire worthless.

The Company shall reserve such amount of its profits or share premium in order to pay up the par value of each share issuable in respect of the rights.

Note 9 — Segment information

ASC Topic 280, “Segment Reporting,” establishes standards for companies to report in their financial statements information about operating segments, products, services, geographic areas, and major customers. Operating segments are defined as components of an enterprise for which separate financial information is available that is regularly evaluated by the Company’s chief operating decision maker, or group, in deciding how to allocate resources and assess performance. The Company has adopted the guidance in ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, in the accompanying unaudited condensed financial statements using the retrospective method of adoption.

Table of Contents

Horizon Space Acquisition II Corp.

Notes To Unaudited Condensed Financial Statements

When evaluating the Company’s performance and making key decisions regarding resource allocation the CODM reviews several key metrics, which include the following:

	For the Three Months Ended March 31, 2026			For the Three Months Ended March 31, 2025
	(Unaudited)			(Unaudited)
Professional services fee in connection with Business Combination	$	(109,150	)	$	(142,800	)
Other formation and operating costs		(255,755	)		(110,679	)
Total formation and operating costs		(364,905	)		(253,479	)
Interest earned on investment held in Trust Account		588,076			726,071
Interest expense		(252,293	)		-
Net income	$	(29,122	)	$	472,592

Note 10 — Subsequent Events

The Company’s management reviewed all material events that have occurred after the balance sheet date through the date when the financial statements were issued. Based on the review, except for the subsequently issued extension deposit and notes mentioned in Note 1 and Working Capital Note mentioned in Note 5, the Company did not identify any other subsequent events that would require adjustment or disclosure in the financial statements.

Table of Contents

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Forward-Looking Statements

This Quarterly Report on Form 10-Q includes forward-looking statements. We have based these forward-looking statements on our current expectations and projections about future events. These forward-looking statements are subject to known and unknown risks, uncertainties and assumptions about us that may cause our actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by such forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may,” “should,” “could,” “would,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “continue,” or the negative of such terms or other similar expressions. Factors that might cause or contribute to such a discrepancy include, but are not limited to, those described in our other Securities and Exchange Commission (“SEC”) filings. References to the “Company,” “us,” “our,” or “we” refer to Horizon Space Acquisition II Corp. The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our unaudited financial statements and related notes herein.

Overview

We are a blank check company formed under the laws of Cayman Island on March 21, 2023, for the purpose of entering into a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities, which we refer to as a “target business.” Our efforts to identify a prospective target business will not be limited to a particular industry or geographic region. Because of our significant ties to China, we may pursue opportunities in China (including Hong Kong and Macau).

We presently have no revenue, have had losses since inception from incurring formation and operating costs and have had no operations other than identifying and evaluating suitable acquisition transaction candidates. We have relied upon the working capital available to us following the consummation of the IPO (as defined below) and the Private Placement (as defined below) to fund our operations, as well as the funds loaned by the Sponsor (as defined below), our officers, directors or their affiliates. We expect to continue to incur significant costs in the pursuit of our acquisition plans. We cannot assure you that our plans to raise capital or to complete our initial business combination will be successful.

On November 18, 2024, we consummated the initial public offering (the “IPO”) of 6,000,000 units (the “Units”). Each Unit consists of one ordinary share, $0.0001 par value per share (each, an “Ordinary Share”), and one right (each, a “Right”), each one Right entitling the holder thereof to exchange for one-tenth of one Ordinary Share upon the completion of the Company’s initial business combination. The Units were sold at an offering price of $10.00 per Unit, generating gross proceeds of $60,000,000. On November 19, 2024, Maxim Group LLC, the representative of the underwriters of the IPO (the “Representative”) notified us of its exercise of the over-allotment option in full to purchase additional 900,000 Units of the Company (the “Over-Allotment Option”). As a result, on November 21, 2024, 900,000 Units were sold to the Representative at an offering price of $10.00 per Unit (the “Option Units” and together with the Units, collectively, the “Public Units”), generating gross proceeds of $9,000,000.

Simultaneously with the consummation of the IPO, we consummated the private placement of 200,000 units (the “Initial Private Units”) to our Sponsor, Horizon Space Acquisition II Sponsor Corp. (the “Sponsor”), at a price of $10.00 per Private Unit, generating total proceeds of $2,000,000. Simultaneously with the issuance and sale of the Option Units, we completed a private placement sale of additional 13,500 units (the “Additional Private Units” and together with the Initial Private Units, collectively, the “Private Units”) to the Sponsor at a purchase price of $10.00 per Additional Private Unit, generating gross proceeds of $135,000. The sale of the Initial Private Units and the Additional Private Units are collectively referred to herein as the “Private Placement.”

Table of Contents

The proceeds of $69,000,000 ($10.00 per Unit) from the IPO, the sale of the Option Units, and the Private Placement were placed in a trust account (the “Trust Account”) established for the benefit of our public shareholders and the underwriters of the IPO with Wilmington Trust, N.A. acting as trustee.

We also issued to the Representative, 241,500 Ordinary Shares as part of the underwriting compensation (the “Representative Shares”), among which, 210,000 were issued on the closing of the IPO and 31,500 were issued simultaneously with the issuance and sale of the Option Units. The Representative Shares are identical to the Ordinary Shares included in the Units, with certain exceptions.

Commencing on or about February 5, 2025, the holders of the Public Units may select to separately trade on Nasdaq the Ordinary Shares and Rights included in the Public Units under the symbols “HSPT” and “HSPTR”, respectively. Public Units not separated will continue to trade on Nasdaq under the symbol “HSPTU.”

In connection with the Business Combination EGM on February 13, 2026, an aggregate of 3,219,311 ordinary shares of HSPT were redeemed for $34,221,276 on March 17, 2026. In addition, in connection with the Business Combination EGM on February 12, 2026, 3,502,404 ordinary shares of HSPT were submitted for redemption, which will be redeemed upon and following the consummation of the Business Combination.

Extension Deposit and Note

On or about May 14, 2026, an aggregate of $50,000 was deposited into the Trust Account for the Company’s public shareholders by William Wang, the Chief Executive Officer of SL Bio, which enables the Company to extend the period of time it has to consummate its initial business combination by one month from May 18, 2026 to June 18, 2026. In connection with the deposit, on March 18, 2026, the Company issued an unsecured promissory note (the “Extension Note”) of $50,000 to William Wang.

The Extension Note bears no interest and is payable in full upon the earlier to occur of (i) the consummation of the Company’s business combination or (ii) the date of expiry of the term of the Company (the “Maturity Date”). The following shall constitute an event of default: (i) a failure to pay the principal within five business days of the Maturity Date; (ii) the commencement of a voluntary or involuntary bankruptcy action, (iii) the breach of the Company’s obligations thereunder; (iv) any cross defaults; (v) an enforcement proceedings against the Company; and (vi) any unlawfulness and invalidity in connection with the performance of the obligations thereunder, in which case the Extension Note may be accelerated.

The payee has the right, but not the obligation, to convert the Extension Note, in whole or in part, respectively, into private units of the Company, each consisting of one Ordinary Share, and one right to receive one-tenth (1/10) of one Ordinary Share upon the consummation of a business combination, as described in the prospectus of the Company (File No: 333-282758), by providing the Company with written notice of the intention to convert at least two business days prior to the closing of the business combination. The number of units to be received by the payee in connection with such conversion shall be an amount determined by dividing (x) the sum of the outstanding principal amount payable to the payee by (y) $10.00.

Working Capital Note

In order to meet our working capital needs following the consummation of this offering until completion of an initial business combination, our Sponsor, officers and directors or their affiliates or designees may, but are not obligated to, loan us funds, from time to time or at any time, in whatever amount they deem reasonable in their sole discretion. The notes would either be paid upon consummation of our initial business combination, without interest, or, at the lender’s discretion, up to $2,500,000 of the working capital loans may be converted upon consummation of our business combination into working capital units at a price of $10.00 per unit.

The Working Capital Units would be identical to the Private Units sold in the Private Placement. The terms of such loans by the Sponsor or its affiliates, if any, have not been determined and no written agreements exist with respect to such loans. As of March 31, 2026 and December 31, 2025, the Company had no borrowings under the Working Capital Loans.

On May 18, 2026, the Company issued a promissory note (the “Working Capital Note”) to the Sponsor, under which the Sponsor agreed to loan the Company up to $850,000 to be used for a portion of the working capital. This loan is non-interest bearing, unsecured and is due at the earlier of (i) the consummation of the Company’s initial business combination or (ii) the date of expiry of the term of the Company. The Sponsor, as the payee, has the right, but not the obligation, to convert the note, in whole or in part, into Private Units of the Company, that are identical to the Private Units issued by the Company in the Private Placement consummated simultaneously with the Company’s IPO, subject to certain exceptions, by providing the Company with written notice of the intention to convert at least two business days prior to the closing of a business combination. The number of Private Units to be received by the Sponsor in connection with such conversion shall be an amount determined by dividing (x) the sum of the outstanding principal amount payable to the Sponsor by (y) $10.00.

Results of Operations and Known Trends or Future Events

We have neither engaged in any operations nor generated any revenues to date. Our only activities from inception through March 31, 2026 were organizational activities and those necessary to prepare for the IPO, search for a target candidate and complete the proposed business combination. We do not expect to generate any operating revenues until after the completion of the business combination. There has been no significant change in our financial or trading position and no material adverse change has occurred since the date of our audited financial statements. After the IPO, we expect to incur increased expenses as a result of being a public company (for legal, financial reporting, accounting and auditing compliance), as well as for expenses associated with the search for target opportunities.

For the three months ended March 31, 2026, we had a net loss of $29,122, of which $588,076 was interest income and dividend income from investments held in trust, offset formation and operating expenses of $364,905 and interest expense of $252,293.

For the three months ended March 31, 2025, we had a net income of $472,592, of which $726,071 was interest and dividend income from investments held in trust, offset formation and operating expenses of $253,479.

Table of Contents

Liquidity and Capital Resources

As of March 31, 2026, the Company had cash of $9,586 and working capital deficit of $1,784,554, excluding $37,482,848 payables due to redeeming shareholders to be paid out from the Trust Account.

We intend to use substantially all of the net proceeds of the IPO, including the funds held in the Trust Account, to acquire a target business or businesses and to pay our expenses relating thereto. To the extent that our share capital is used in whole or in part as consideration to effect our initial business combination, the remaining proceeds held in the Trust Account as well as any other net proceeds not expended will be used as working capital to finance the operations of the target business. Such working capital funds could be used in a variety of ways including continuing or expanding the target business’ operations, for strategic acquisitions and for marketing, research and development of existing or new products. Such funds could also be used to repay any operating expenses or finders’ fees which we had incurred prior to the completion of our initial business combination if the funds available to us outside of the Trust Account were insufficient to cover such expenses.

Prior to consummation of an initial business combination, we will be using the funds held outside of the Trust Account for identifying and evaluating prospective acquisition candidates, performing business due diligence on prospective target businesses, traveling to and from the offices, plants or similar locations of prospective target businesses, reviewing corporate documents and material agreements of prospective target businesses, selecting the target business to acquire and structuring, negotiating and consummating the business combination.

If our estimates of the costs of undertaking in-depth due diligence and negotiating our initial business combination is less than the actual amount necessary to do so, or the amount of interest available to us from the Trust Account is less than we expect as a result of the current interest rate environment, we may have insufficient funds available to operate our business prior to our initial business combination. Moreover, we may need to obtain additional financing either to consummate our initial business combination or because we become obligated to redeem a significant number of our public shares upon consummation of our initial business combination, in which case we may issue additional securities or incur debt in connection with such business combination. Subject to compliance with applicable securities laws, we would only consummate such financing simultaneously with the consummation of our initial business combination. Following our initial business combination, if cash on hand is insufficient, we may need to obtain additional financing in order to meet our obligations.

The Company has incurred and expects to continue to incur significant professional costs to remain as a publicly traded company and to incur significant transaction costs in pursuit of the consummation of a business combination. In connection with the Company’s assessment of going concern considerations in accordance with ASC Subtopic 205-40, Presentation of Financial Statements - Going Concern, management has determined that these conditions raise substantial doubt about the Company’s ability to continue as a going concern. Management’s plan in addressing this uncertainty is through the working capital loans from our Sponsor or its affiliates. In addition, if the Company is unable to complete a business combination by June 18, 2026 (or up to February 18, 2027, if fully extended) (the “Combination Period”), unless further extended, the Company’s board of directors would proceed to commence a voluntary liquidation and thereby a formal dissolution of the Company. There is no assurance that the Company’s plans to consummate a business combination will be successful within the Combination Period. As a result, management has determined that such additional condition also raise substantial doubt about the Company’s ability to continue as a going concern. The financial statements of the Company do not include any adjustments that might result from the outcome of this uncertainty.

Off-Balance Sheet Financing Arrangements

We have no obligations, assets or liabilities that would be considered off-balance sheet arrangements as of March 31, 2026. We do not participate in transactions that create relationships with unconsolidated entities or financial partnerships, often referred to as variable interest entities, which would have been established for the purpose of facilitating off-balance sheet arrangements. We have not entered into any off-balance sheet financing arrangements, established any special purpose entities, guaranteed any debt or commitments of other entities, or purchased any non-financial assets.

Table of Contents

Contractual Obligations

As of March 31, 2026, we do not have any long-term debt, capital lease obligations, operating lease obligations or long-term liabilities.

The Ordinary Shares initially issued to the Sponsor prior to the consummation of the IPO (the “Founder Shares”), Ordinary Shares included in the Private Units, and any Ordinary Shares that may be issued upon conversion of working capital loans (and any underlying securities) will be entitled to registration rights pursuant to a registration rights agreement entered into in connection with the IPO. The holders of these securities are entitled to make up to two demands, excluding short form demands, that we register such securities. In addition, the holders have certain “piggy-back” registration rights with respect to registration statements filed subsequent to our completion of our initial business combination. We will bear the expenses incurred in connection with the filing of any such registration statements.

Critical Accounting Estimates

We prepare our financial statements in accordance with accounting principles generally accepted in the United States of America. The preparation of financial statements also requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, costs and expenses and related disclosures. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances. Actual results could differ significantly from the estimates made by our management. We did not identify any critical accounting estimates.

Recent Accounting Pronouncements

Recently issued accounting standards which have not yet been adopted

Item 3. Quantitative and Qualitative Disclosures about Market Risk

As a smaller reporting company, we are not required to make disclosures under this Item.

Item 4. Controls and Procedures

Disclosure controls and procedures are controls and other procedures that are designed to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosure.

Table of Contents

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of our management, including our principal executive officer and principal financial and accounting officer, we conducted an evaluation of the effectiveness of our disclosure controls and procedures as of the end of the quarter ended March 31, 2026, as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act. Based on this evaluation, our principal executive officer and our principal financial and accounting officer have concluded that during the period covered by this report, our disclosure controls and procedures were effective.

Disclosure controls and procedures are designed to ensure that information required to be disclosed by us in our Exchange Act reports is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial and accounting officer or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There have been no changes in our internal control over financial reporting during the quarter ended March 31, 2026 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Table of Contents

PART II – OTHER INFORMATION

Item 1. Legal Proceedings

We are not currently a party to any material litigation or other legal proceedings brought against us. We are also not aware of any legal proceeding, investigation or claim, or other legal exposure that has a more than remote possibility of having a material adverse effect on our business, financial condition or results of operations.

Item 1A. Risk Factors

Not applicable to a smaller reporting company. However, factors that could cause our actual results to differ materially from those in this Quarterly Report are any of the risks described in the prospectus dated November 14, 2024, relating to the IPO (File No. 333- 282758), filed with the SEC on November 15, 2024 (the “Prospectus”), and our annual report on Form 10-K for the fiscal year ended December 31, 2025 (the “Annual Report”) as filed with the SEC on April 8, 2026. Any of these factors could result in a significant or material adverse effect on our results of operations or financial condition. Additional risk factors not presently known to us or that we currently deem immaterial may also impair our business or results of operations. As of the date of this Quarterly Report, there have been no material changes to the risk factors disclosed in the Prospectus and the Annual Report.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds from Registered Securities

The information under Item 2 – “Extension Deposit and Note” and “Working Capital Note” of this Quarterly Report is incorporated herein by reference in response to this item. The issuances of the Working Capital Note and the Extension Note were made pursuant to the exemption from registration contained in Section 4(a)(2) of the Securities Act of 1933, as amended.

Item 3. Defaults upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

Table of Contents

Item 6. Exhibits.

Exhibit No.		Description
10.1*		Sponsor Promissory Note, dated May 18, 2026, issued by the Company to Horizon Space Acquisition II Sponsor Corp.
10.2*		Promissory Note, dated May 18, 2026, issued by the Company to William Wang
31.1*		Certification of Chief Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*		Certification of Chief Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**		Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2**		Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS		Inline XBRL Instance Document.
101.SCH		Inline XBRL Taxonomy Extension Schema Document.
101.CAL		Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF		Inline XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB		Inline XBRL Taxonomy Extension Label Linkbase Document.
101.PRE		Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104		Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

*	Filed herewith.

**	Furnished.

Table of Contents

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Horizon Space Acquisition II Corp.

Date: May 20, 2026	By:	/s/ Mingyu (Michael) Li
		Mingyu (Michael) Li
		Chief Executive Officer

Date: May 20, 2026	By:	/s/ Min (Lydia) Zhai
		Min (Lydia) Zhai
		Chief Financial Officer

Horizon Space Acquisition II Corp. 10-Q