York Space Systems Hit With Securities Fraud Lawsuit Over Alleged Software Failures; Lead Plaintiff Deadline Set for October 30

York Space Systems Inc. (NYSE: YSS) is facing a securities fraud lawsuit alleging the company made materially false statements about its satellite software and its contracts with the Pentagon's Space Development Agency (SDA), according to multiple law firms announcing the action.

The lawsuit, captioned *Ianelli v. York Space Systems, Inc. et al.*, No. 26-cv-04074, is pending in the U.S. District Court for the District of Colorado. It covers investors who purchased York Space common stock in the company's January 2026 initial public offering or traded securities between January 29, 2026 and May 11, 2026 — the "Class Period."

**IPO and Allegations**

York Space raised proceeds from an IPO of approximately 18.5 million shares at $34.00 per share, according to the complaint as described by Robbins Geller Rudman & Dowd LLP, one of the law firms representing investors. The company reported that for fiscal 2025, 96% of its revenue came from projects contracted by the U.S. Federal Government under the SDA.

The lawsuit alleges that defendants — including top current and former executives, incoming directors, and IPO underwriters — violated the Securities Act of 1933 and/or the Securities Exchange Act of 1934. Specifically, the complaint claims that York Space's onboard mission and payload software was not fully functional before satellites were launched, and that this ongoing deficiency put the company's SDA contracts at risk.

According to the allegations, York Space deceived the SDA with false advertising to win contracts, cut corners, and delivered satellites whose mission-critical software was not completed. As a result, the lawsuit asserts, defendants' positive statements about York Space's business, operations, and prospects were materially misleading and lacked a reasonable basis.

**The Triggering Event**

On May 11, 2026, at approximately 10 a.m. EST, Wolfpack Research published a short report titled "YSS: Lost In Space – The Pentagon Just Killed 96% of York’s Revenue," according to the complaint as described by Robbins Geller. The report allegedly cited multiple former software engineers who stated that York Space "sent satellites into space without even knowing if the software was fit to accomplish its basic mission." The report also raised suspicions that the Pentagon's decision to eliminate Tranche 3 funding was "rooted in severe disappointment in York."

**Lead Plaintiff Deadline**

Investors have until October 30, 2026 to move the court to serve as lead plaintiff — a representative party who directs the litigation on behalf of the class. The deadline applies to those who purchased York Space common stock in the IPO or during the Class Period.

Multiple law firms are seeking investor clients. The Rosen Law Firm, a global investor rights firm, reminded purchasers of the deadline. ClaimsFiler, a shareholder information service, noted that lawyers at Kahn Swick & Foti, LLC are available to discuss legal options. Robbins Geller Rudman & Dowd LLP, which ranked No. 1 on the most recent ISS Securities Class Action Services Top 50 Report, is also representing investors. Schall, Brown & Schwartz LLP similarly announced the action, citing violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934.

No class has been certified yet. Investors who wish to share in any potential recovery are not required to serve as lead plaintiff, and may remain absent class members. The law firms noted that representation is not automatic; investors must retain counsel to be represented.