York Space Systems Inc. investors who bought shares in or traceable to its January 2026 IPO, or purchased securities from Jan. 29 through May 11, 2026, have until Oct. 30, 2026, to seek appointment as lead plaintiff in a proposed securities class action, Rosen Law Firm said. The lawsuit alleges that York Space launched satellites with incomplete onboard mission and payload software, creating risks for its Space Development Agency contracts. It further alleges that the company used misleading advertising to obtain SDA contracts and made positive business statements without a reasonable basis. The claims have not been proven, and no class has been certified.