YSS CLASS ACTION NOTICE: Glancy Prongay Wolke & Rotter LLP Files Securities Lawsuit On Behalf Of York Space Systems, Inc. Investors

LOS ANGELES--(BUSINESS WIRE)--Glancy Prongay Wolke & Rotter LLP (“GPWR”), announces that it has filed a class action lawsuit in the United States District Court for the District of Colorado, captioned Ianelli v. York Space Systems, Inc. et al., 1:26-cv-04074, on behalf of persons and entities that purchased or otherwise acquired York Space Systems, Inc. (“York Space Systems” or the “Company”) (NYSE: YSS): (a) common stock pursuant and/or traceable to the registration statement and prospectus issued in connection with the January 2026 initial public offering; and/or (b) securities between January 29, 2026 and May 11, 2026, inclusive (the “Class Period”). Plaintiff pursues claims under Sections 11 and 15 of the Securities Act of 1933 (the “Securities Act”) and Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 (the “Exchange Act”).

Investors are hereby notified that they have 60 days from the date of this notice to move the Court to serve as lead plaintiff in this action.

IF YOU SUFFERED A LOSS ON YOUR YORK SPACE SYSTEMS, INC. INVESTMENTS, CLICK HERE TO INQUIRE ABOUT POTENTIALLY PURSUING CLAIMS TO RECOVER YOUR LOSS UNDER THE FEDERAL SECURITIES LAWS.

What Happened?

On May 11, 2026, at approximately 10 AM EST, Wolfpack Research published a report, stating that it “suspect[s]” that the Pentagon’s decision to “halt Tranche 3 funding and destroy the SDA . . . may have been due to York’s failure to live up to their own hype.” Among other things, the report stated that the Company’s “main pitch to customers and investors” was “that they [are] operating on a modular platform” but multiple former employees claimed that York “sent satellites into space without even knowing if the software was fit to accomplish its basic mission.” That is, the report claimed that “York’s satellites simply did not function as expected because the company did not finish developing the software for these satellites before launching them” and waited until they were in orbit to fully debug them.

On this news, YSS stock price fell approximately $7 during intraday trading on May 11, 2026, thereby injuring investors.

By the commencement of this action, the Company’s stock was trading as low as $9.33 per share, an over 70% decline from the $34 per share IPO price.

What Is The Lawsuit About?

The complaint filed in this class action alleges that Defendants made materially false and/or misleading statements, as well as failed to disclose material adverse facts about the Company’s business, operations, and prospects. Specifically, Defendants failed to disclose to investors that: (1) that York’s onboard mission and payload software was not fully functional before satellites were launched; (2) that this ongoing trend presented a risk to the Company’s contracts with the SDA deceived the SDA with false advertising to win its contracts, cut corners, and delivered satellites whose mission-critical-software was not completed; and (3) that, as a result of the foregoing, Defendants’ positive statements about the Company’s business, operations, and prospects, were materially misleading and/or lacked a reasonable basis.

If you purchased or otherwise acquired York Space Systems, Inc. securities, you may move the Court no later than 60 days from the date of this notice to ask the Court to appoint you as lead plaintiff.

Contact Us To Participate or Learn More:

If you wish to learn more about this action, or if you have any questions concerning this announcement or your rights or interests with respect to these matters, please contact us:

Charles Linehan, Esq.,
Glancy Prongay Wolke & Rotter LLP,
1925 Century Park East, Suite 2100,
Los Angeles California 90067
Email: [e-mail]
Telephone: [phone],
Toll-Free: 888-773-9224
Visit our website at www.glancylaw.com.
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If you inquire by email, please include your mailing address, telephone number and number of shares purchased.

To be a member of the Class you need not take any action at this time; you may retain counsel of your choice or take no action and remain an absent member of the Class.

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