ATLANTA, GA – – (Globe Newswire – September 1, 2026) – – A shareholder class action lawsuit has been filed against York Space Systems, Inc. (“York”) (NYSE: YSS). The lawsuit alleges that Defendants, in York’s Registration Statement and throughout the Class Period, made false and misleading statements and/or failed to disclose material adverse facts, including allegations that: (1) York’s onboard mission and payload software was not fully functional before satellites were launched; (2) this ongoing trend presented a risk to York’s contracts with the Space Development Agency; and (3) as a result of the foregoing, Defendants’ positive statements about York’s business, operations, and prospects, were materially misleading and/or lacked a reasonable basis.

If you purchased York shares between January 29, 2026 and May 11, 2026 and experienced a loss on that investment, you are encouraged to discuss your legal rights by contacting Marshall P. Dees, Esq. at mdees@holzerlaw.com, by toll-free telephone at (888) 508-6832, or by visiting the firm’s website at www.holzerlaw.com/case/york-space-systems/ for more information.

The deadline to ask the court to be appointed lead plaintiff in the case is October 30, 2026.