Portnoy Law Firm Announces Class Action on Behalf of York Space Systems Investors

LOS ANGELES, Sept. 02, 2026 (GLOBE NEWSWIRE) — The Portnoy Law Firm advises York Space Systems, (“York” or the “Company”) (NYSE: YSS) investors of a class action on behalf of investors that bought securities between January 29, 2026 – May 11, 2026, inclusive (the “Class Period”). York investors have until October 30, 2026 to file a lead plaintiff motion.

Investors are encouraged to contact attorney Lesley F. Portnoy, by phone 310-692-8883 or email: lesley@portnoylaw.com, to discuss their legal rights, or join the case via https://portnoylaw.com/york-space-systems. The Portnoy Law Firm can provide a complimentary case evaluation and discuss investors’ options for pursuing claims to recover their losses.

On or around January 29, 2026, York completed its initial public offering (“IPO”) of 18.5 million shares priced at $34.00. Then, on May 11, 2026, Wolfpack published a short report entitled “YSS: Lost In Space – The Pentagon Just Killed 96% of York’s Revenue”. The Wolfpack report alleges that the Pentagon’s decision to eliminate its Space Development Agency (“SDA”) Tranche 3 Transport Layer—a program responsible for the majority of York’s annual revenue—“was rooted in severe disappointment in York.” Citing discussions with “multiple former employees who were highly critical of York,” Wolfpack alleges that it “heard claims that York deceived the SDA with false advertising to win its contracts, cut corners, and delivered satellites whose mission-critical-software was not completed.”

The Portnoy Law Firm represents investors in pursuing claims caused by corporate wrongdoing. The Firm’s founding partner has recovered over $5.5 billion for aggrieved investors. Attorney advertising. Prior results do not guarantee similar outcomes.

Lesley F. Portnoy, Esq.
Admitted CA, NY and TX Bar
lesley@portnoylaw.com
310-692-8883
www.portnoylaw.com

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