YSS Shareholder Alert: York Space Systems Inc. Securities Class Action Lawsuit - Investors Should Contact Levi & Korsinsky

SEC filings warned only that a "material adverse change in the SDA's mandate could materially reduce our revenues," while, the complaint alleges, York's mission-critical satellite software was already incomplete at launch and 96% of revenue rested on a program the Pentagon was restructuring.

NEW YORK, Sept. 30, 2026 /PRNewswire/ -- Levi & Korsinsky, LLP notifies investors in York Space Systems Inc. (NYSE: YSS) that a securities class action has been filed on behalf of shareholders who purchased or acquired securities between January 29, 2026 and May 11, 2026, and on behalf of purchasers in or traceable to the Company's January 2026 initial public offering. Submit your information. You may also contact Joseph E. Levi, Esq. at [email protected] or (212) 363-7500.

YSS priced its IPO at $34.00 per share, selling approximately 18.5 million shares for net proceeds of roughly $583.4 million. Shares have since traded as low as $9.33, a decline of $24.67 per share, or over 70%. Lead plaintiff applications must be submitted by October 30, 2026.

What York's SEC Filings Actually Disclosed

SEC filings stated that the Space Development Agency accounted for substantially all revenue and that "[a] material adverse change in the SDA's mandate could materially reduce our revenues and backlog." The same filings touted an "incumbent position leading into Tranches 3 and 4" and "proprietary satellite software enabling versatile integration of a variety of payloads." Disclosure language indicated risk only in conditional terms, using "could" and "may."

Disclosure Gaps Alleged

The complaint challenges the adequacy of those disclosures on the following grounds:

• Onboard mission and payload software was allegedly not fully functional before satellites were launched, with debugging allegedly performed in orbit.
• Former employees cited in a May 11, 2026 research report allegedly described the "modular" platform as "false advertising," stating satellites were "made to order."
• Manufacturing and testing corners were allegedly cut to protect launch dates.
• Applicable SEC rules required disclosure of known trends, events, or uncertainties reasonably likely to affect continuing operations; plaintiffs allege this software trend was omitted.
• Conditional SDA risk language allegedly did not convey that alleged performance shortfalls already threatened the contracts generating 96% of fiscal 2025 revenue.

Regulatory Reality Behind the Warnings

On March 26, 2026, Breaking Defense reported the SDA was at least three months behind on demonstrating Tranche 1 laser mesh links and was taking a "strategic pause" on launches. In April 2026, the Space Force Spring 2026 budget restructured the Transport Layer program and halted Tranche 3 payments. On May 11, 2026, YSS fell approximately $7 intraday on unusually heavy volume following the research report.

"Generic risk factor language cannot substitute for disclosing specific, known problems that are already affecting a company's operations. Here, the action alleges investors were told a change in the SDA's mandate 'could' reduce revenue while software was allegedly still being debugged on orbit." -- Joseph E. Levi, Esq.

Act now. Click here to learn more or call (212) 363-7500.

ABOUT LEVI & KORSINSKY, LLP — Over the past 20 years, Levi & Korsinsky has secured hundreds of millions of dollars for aggrieved shareholders. The firm has extensive expertise in complex securities litigation and a team of over 70 employees. For seven consecutive years, Levi & Korsinsky has ranked in ISS Securities Class Action Services' Top 50 Report. Investors who suffered losses have until October 30, 2026 to seek appointment as lead plaintiff.

Frequently Asked Questions About the YSS Lawsuit

Q: Who is eligible to join the YSS investor lawsuit? A: Investors who purchased YSS stock or securities between January 29, 2026 and May 11, 2026 and suffered financial losses may be eligible. Eligibility is based on purchase date and documented losses, not on whether you still hold the shares.

Q: What specific misstatements does the YSS lawsuit allege? A: The complaint alleges York Space Systems Inc. made materially false or misleading statements regarding the functionality and readiness of its satellite software and the maturity of its purportedly modular platform during the Class Period. When reports disclosed that mission-critical software was allegedly incomplete at launch and that Tranche 3 Transport Layer funding had been halted, the stock price declined sharply.

Q: What court was the YSS class action filed in? A: The case was filed in the United States District Court for the District of Colorado, governed by the Private Securities Litigation Reform Act of 1995.

Q: What do YSS investors need to do right now? A: Investors may gather brokerage records showing purchase dates, share quantities, and prices paid. Submit your information for a no-cost, no-obligation evaluation of your potential recovery. No immediate action is required to remain eligible as an absent class member.

Q: What documents do I need to to submit my information? A: Brokerage statements or trade confirmations showing purchase dates, share quantities, prices paid, and any subsequent sale dates and prices.

Q: What if I already sold my YSS shares, can I still recover losses? A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought during the Class Period and sold at a loss may still be eligible to participate.

Q: What does it cost me to participate? A: There is no upfront cost to submit your information and review whether you may be eligible to recover. Should you choose to participate in the securities class action, they are generally handled on a contingency basis, with any attorneys' fees and expenses subject to court approval.

Q: What if I live outside the United States? A: U.S. securities class actions generally cover purchases on U.S. exchanges regardless of the investor's country of residence.

CONTACT:
Levi & Korsinsky, LLP
Joseph E. Levi, Esq.
Ed Korsinsky, Esq.
33 Whitehall Street, 27th Floor
New York, NY 10004
[email protected]
Tel: (212) 363-7500
Fax: (212) 363-7171
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SOURCE Levi & Korsinsky, LLP