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Kirby McInerney LLP Reminds Investors That a Class Action Lawsuit Has Been Filed on Behalf of Y-mAbs Therapeutics, Inc. (YMAB) Investors and Encourages Investors to Contact the Firm Before March 20, 2023

Newsfile 17-Mar-2023 5:45 PM

New York, New York--(Newsfile Corp. - March 17, 2023) - The law firm of Kirby McInerney LLP announces that a class action lawsuit has been filed in the U.S. District Court for the Southern District of New York on behalf of those who acquired Y-mAbs Therapeutics, Inc. ("Y-mAbs") (NASDAQ:YMAB) securities during the period from October 6, 2020 through October 28, 2022 (the "Class Period"). Investors have until March 20, 2023 to apply to the Court to be appointed as lead plaintiff in the lawsuit.

On October 26, 2022, the FDA publicly released its Briefing Document for the Advisory Committee Meeting, in which it identified three key issues in the application submitted by Y-mAbs and brought to light Y-mAbs's election to resubmit the BLA on March 31, 2022 prior to reaching agreement with the FDA on the content of the application. The Briefing Document stated that the FDA had allegedly repeatedly raised its concerns to the defendants in prior communications and meetings such as the pre-BLA Type B meeting on January 13, 2022. On this news, the price of Y-mAbs shares declined by $4.16 per share, or approximately 27.42%, from $15.17 per share to close at $11.01 on October 26, 2022. The price then declined again by $2.16 per share, or approximately 19.62%, from $11.01 per share to close at $8.85 on October 27, 2022.

On October 28, 2022, Y-mAbs filed a Form 8-K with the SEC, which informed investors that the AdCom had voted 16 to 0 that Y-mAbs had not provided sufficient evidence to conclude that Omburtamab improved overall survival. The grounds for denial were precisely the same grounds that Y-mAbs was apprised of by the FDA during their 2020 bid for BLA approval. On this news, the price of Y-mAbs shares declined by $5.32 per share, or approximately 59.57%, from $8.93 per share to close at $3.61 on October 31, 2022.

The lawsuit alleges that, throughout the Class Period, Defendants made false and/or misleading statements, as well as failed to disclose that: (i) the FDA had repeatedly advised Y-mAbs that the treatment of effect of omburtamab cannot be objectively established or quantified based on the methods Y-mAbs were utilizing; (ii) Study 101 was neither sufficiently advanced nor indicative of efficacy to justify approval; and (iii) Y-mAbs had elected to submit the March 31, 2022 biologics license application prior to reaching agreement with the FDA on the content of the application.

If you purchased or otherwise acquired Y-mAbs securities, have information, or would like to learn more about this investigation, please contact Thomas W. Elrod of Kirby McInerney LLP by email at, or by filling out this contact form, to discuss your rights or interests with respect to these matters without any cost to you.

Kirby McInerney LLP is a New York-based plaintiffs' law firm concentrating in securities, antitrust, whistleblower, and consumer litigation. The firm's efforts on behalf of shareholders in securities litigation have resulted in recoveries totaling billions of dollars. Additional information about the firm can be found at Kirby McInerney LLP's website:

This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and ethical rules.

Kirby McInerney LLP
Thomas W. Elrod, Esq.

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