UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): March 4, 2025

Y-MABS THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)


Delaware	001-38650	47-4619612
(State or other jurisdiction of incorporation or organization)	(Commission File Number)	(I.R.S. Employer Identification No.)

202 Carnegie Center, Suite 301

Princeton, NJ 08540

(Address of principal executive offices) (Zip Code)

(646) 885-8505

(Registrant’s telephone number, include area code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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


Title of each class:	Trading Symbol	Name of each exchange on which registered:
Common Stock, $0.0001 par value	YMAB	NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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. ☐

ITEM 1.01 ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT.

On March 4, 2025, Y-mAbs Therapeutics, Inc. (the “Company”) entered into an Equity Distribution Agreement (the “Sales Agreement”) with Oppenheimer & Co. Inc. (the “Sales Agent”), under which it may offer and sell its common stock from time to time through the Sales Agent. Pursuant to the prospectus supplement referenced below, the Company may offer and sell common stock having aggregate sales proceeds of up to $35.0 million. Sales of the Company’s common stock through the Sales Agent, if any, will be made by any method permitted by law deemed to be an “at the market offering” as defined in Rule 415(a)(4) under the Securities Act of 1933, as amended, including without limitation sales made directly on the Nasdaq Global Select Market or any other existing trading market for its common stock. The Sales Agent will use commercially reasonable efforts to sell the Company’s common stock from time to time, based upon instructions from the Company (including any price, time or size limits or other customary parameters or conditions the Company may impose). The Company will pay the Sales Agent a commission of up to 3.0% of the gross proceeds from any sale of common stock sold through the Sales Agent under the Sales Agreement. The Company has also provided the Sales Agent with customary indemnification rights.

The Company is not obligated to make any sales of common stock under the Sales Agreement. The offering of shares of the Company’s common stock pursuant to the Sales Agreement will terminate as provided therein.

The foregoing description of the Sales Agreement is not complete and is qualified in its entirety by reference to the full text of the Sales Agreement, a copy of which is filed herewith as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated herein by reference. This Current Report on Form 8-K also incorporates by reference the Sales Agreement into the Registration Statement (as defined below).

The Company’s common stock is being offered and sold pursuant to the Company’s effective shelf registration statement on Form S-3 and an accompanying prospectus (Registration Statement No. 333-271006) declared effective by the U.S. Securities and Exchange Commission on May 5, 2023 (the “Registration Statement”) and a prospectus supplement dated March 4, 2025. This Current Report on Form 8-K shall not constitute an offer to sell or the solicitation of an offer to buy any security nor shall there be any sale of these securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

A copy of the opinion of Cooley LLP regarding the shares to be sold under the Sales Agreement is filed herewith as Exhibit 5.1 to this Current Report on Form 8-K.

ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS.

(d) Exhibits


Exhibit No.		Description

1.1		Equity Distribution Agreement, dated March 4, 2025, by and between Y-mAbs Therapeutics, Inc. and Oppenheimer & Co. Inc.

5.1		Opinion of Cooley LLP.

23.1		Consent of Cooley LLP (included in Exhibit 5.1).

104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

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


	Y-MABS THERAPEUTICS, INC.

Date: March 4, 2025	By:	/s/ Michael Rossi
		Michael Rossi
		President and Chief Executive Officer

Y-mAbs Therapeutics, Inc. 8-K