New York, New York--(Newsfile Corp. - October 7, 2026) - The law firm of Kirby McInerney LLP reminds York Space Systems Inc. ("York" or the "Company") (NYSE: YSS) investors who acquired: (a) common stock pursuant and/or traceable to the registration statement and prospectus (collectively, the "Registration Statement") issued in connection with the Company's January 29, 2026 initial public offering ("IPO" or the "Offering"); and/or (b) securities during the period of January 29, 2026 through May 11, 2026, inclusive ("the Class Period") of the October 30, 2026 deadline to seek lead plaintiff appointment in the pending class action lawsuit.

Investors are encouraged to contact Lauren Molinaro of Kirby McInerney LLP by email at investigations@kmllp.com, or fill out the contact form below to discuss your rights or interests in the securities fraud class action lawsuit at no cost.

[CONTACT THE FIRM IF YOU SUFFERED A LOSS]

What Is The Lawsuit About?

The lawsuit alleges that York made materially false and/or misleading statements and failed to disclose to investors that: (i) York's onboard mission and payload software was not fully functional before satellites were launched; and (ii) this ongoing trend presented a risk to the Company's contracts with the Pentagon's Space Development Agency ("SDA").

York launched its IPO on January 29, 2026, selling 18.5 million shares priced at $34.00 per share.

On May 11, 2026, Wolfpack Research published a report entitled "YSS: Lost in Space - The Pentagon Just Killed 96% of York's Revenue." The report states, "While the Pentagon has not specified the reasons for their move to halt Tranche 3 funding and destroy the SDA, we suspect it may have been due to York's failure to live up to their own hype." Citing former software engineers, the report asserts that York "sent satellites into space without even knowing if the software was fit to accomplish its basic mission" and 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." On this news, York's stock price fell $3.91, or 10.9%, to close at $31.97 per share on May 12, 2026.

By the commencement of this action, the Company's stock traded as low as $9.33 per share, a more than 70% decline from the $34.00 per share IPO price.

[CLICK HERE TO LEARN MORE ABOUT THE CLASS ACTION]

What Should I Do?

Courts do not consider applications filed after the lead plaintiff deadline. The lead plaintiff oversees the litigation on behalf of the class and may influence key decisions, including litigation strategy and settlement. Courts regularly appoint individual investors as lead plaintiffs, not only institutions. Learn more about the lead plaintiff process and eligibility requirements here.

If you purchased or otherwise acquired York securities, have information, or would like to learn more about this investigation, please contact Lauren Molinaro of Kirby McInerney LLP by email at investigations@kmllp.com, or fill out the contact form above, to discuss your rights or interests with respect to these matters at no cost.

[WHAT SHOULD I KNOW ABOUT SECURITIES CLASS ACTIONS?]

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 on Kirby McInerney LLP's website.

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Source: Kirby McInerney LLP