A securities class action has been filed against York Space Systems Inc. (“York” or the “Company”) (NYSE: YSS) and certain officers and other defendants on behalf of investors who purchased or otherwise acquired: (a) York common stock pursuant and/or traceable to the registration statement and prospectus (collectively, the “Registration Statement”) issued in connection with the Company’s January 2026 initial public offering; and/or (b) York securities between January 29, 2026 and May 11, 2026, inclusive (the “Class Period”).

The action, Ianelli v. York Space Systems Inc., et al., Case No. 1:26-cv-04074, was filed on August 31, 2026 in the U.S. District Court for the District of Colorado. The complaint asserts claims under Sections 11 and 15 of the Securities Act of 1933 and Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder.

If you acquired York securities in connection with the IPO or during the Class Period and suffered a financial loss, contact Kehoe Law Firm to discuss your legal rights without cost or obligation.

What Does the York Space Systems Securities Class Action Allege?

The complaint alleges that York’s registration statement and certain public statements were materially false and/or misleading and failed to disclose material adverse information concerning the Company’s business, operations, and prospects. Specifically, the complaint alleges that defendants failed to disclose that:

• York’s onboard mission and payload software was not fully functional before satellites were launched;
• This alleged ongoing trend presented a risk to York’s contracts with the U.S. Space Development Agency (“SDA”); and
• As a result, defendants’ positive statements about York’s business, operations, and prospects were materially misleading and/or lacked a reasonable basis.

The May 11, 2026 Report and YSS Stock Decline

According to the complaint, on May 11, 2026, Wolfpack Research published a report citing former employees who claimed, among other things, that York launched satellites before mission-critical software was fully developed. Wolfpack Research also suspected that the Pentagon’s decision to halt Tranche 3 funding may have been related to York’s alleged software and performance issues.

The complaint alleges that, on this news, YSS stock fell approximately $7 during intraday trading on May 11, 2026, on unusually heavy trading volume. By the commencement of the action, York’s stock was trading as low as $9.33 per share, more than 70% below the $34.00 per-share IPO price.

Review the York Space Systems Securities Class Action Complaint

York Space Systems Investors: Contact Kehoe Law Firm

Investors who acquired York common stock in connection with the January 2026 IPO and/or York securities during the Class Period and suffered financial losses are encouraged to complete Kehoe Law Firm’s confidential Stockholder Information Request Form or send us a message to discuss their legal rights.

For a free, no-obligation legal evaluation, contact:

Michael Yarnoff, Esq.
(215) 792-6676, Ext. 804
[email protected]
[email protected]

Lead Plaintiff Deadline: October 30, 2026. Investors who wish to seek appointment as lead plaintiff must do so by October 30, 2026. Investors do not need to seek appointment as lead plaintiff to remain potential members of the proposed class or to be eligible to share in any potential recovery.

About Kehoe Law Firm, P.C.

Kehoe Law Firm, P.C. is a nationally recognized, plaintiff-side class action law firm representing investors, consumers, and employees in matters involving securities fraud, corporate misconduct, mergers and acquisitions, antitrust violations, whistleblower claims, data breaches, consumer fraud, employment law violations, and retirement-plan mismanagement. Its attorneys have served as lead or co-lead counsel in major securities cases, recovering more than $10 billion for institutional and individual investors.

Kehoe Law Firm’s class action legal services are provided on a contingency-fee basis, meaning plaintiffs are not responsible for attorneys’ fees or litigation expenses. Any request for attorneys’ fees and expenses will be subject to court approval.

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