Kaplan Fox Reminds York Space Systems, Inc. (YSS) Investors with Significant Losses to Seek a Leadership Role Before Deadline on October 30, 2026

Kaplan Fox & Kilsheimer LLP announces that a class action lawsuit has been filed against York Space Systems, Inc. ("York" or the "Company") (NYSE: YSS) on behalf of investors that purchased or otherwise acquired York common stock pursuant and/or traceable to the Company's registration statement and prospectus issued in connection with its January 2026 initial public offering, and/or between January 29, 2026 and May 11, 2026 (the "Class Period").

If you are an investor in York and have suffered losses, you may CLICK HERE to contact us. You may also contact Kaplan Fox by emailing [email protected] or by calling (646) 315-9003.

If you are a member of the proposed Class, you may move the court no later than October 30, 2026 to serve as a lead plaintiff for the purported class. If you have losses we encourage you to contact us to learn more about the lead plaintiff process. You need not seek to become a lead plaintiff in order to share in any possible recovery.

On May 11, 2026, according to the complaint, Wolfpack Research published a report, stating that it "suspect[s]" that the Pentagon's decision to "halt Tranche 3 funding and destroy the SDA . . . may have been due to York's failure to live up to their own hype." The complaint alleges, among other things, that throughout the Class Period, Defendants made false and/or misleading statements and/or failed to disclose "(1) that York's onboard mission and payload software was not fully functional before satellites were launched; (2) that this ongoing trend presented a risk to the Company's contracts with the SDA; and (3) that, as a result of the foregoing, Defendants' positive statements about the Company's business, operations, and prospects, were materially misleading and/or lacked a reasonable basis."

Kaplan Fox & Kilsheimer LLP is a nationally recognized law firm focused on complex litigation, with offices in New York, Oakland, Los Angeles, Chicago, and New Jersey. Founded in 1956, the firm has spent more than 50 years prosecuting securities, antitrust, and consumer protection actions in federal and state courts nationwide, recovering more than $10 billion for clients and the classes it has represented. Kaplan Fox is widely regarded as one of the nation's premier plaintiffs' securities litigation firms and has received recognition from Chambers and Partners, Benchmark Litigation, Super Lawyers, and Lawdragon. Serving as lead or co-lead counsel in many landmark cases, the firm has secured some of the largest recoveries in the history of securities litigation, including a $2.425 billion recovery on behalf of Bank of America shareholders in In re Bank of America —the largest recovery ever obtained for claims under Section 14(a) of the Securities Exchange Act—$800 million recovered for the Arkansas Teacher Retirement System and other pension funds in ATRS v. Allianz Global Investors , and a $475 million settlement in In re Merrill Lynch . For decades, Kaplan Fox has represented public pension funds, institutional investors, businesses, and individuals in high-stakes litigation. Through its successful advocacy and precedent-setting victories, the firm has helped shape important areas of securities and corporate law while advancing accountability and protecting investor interests.

This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and ethical rules. Past results do not guarantee future outcomes. If you have any questions about this Notice, your rights, or your interests, please contact:

CONTACT: Pamela A. Mayer KAPLAN FOX & KILSHEIMER LLP 800 Third Avenue, 38th Floor New York, New York 10022 (646) 315-9003 [email protected] Laurence D. King KAPLAN FOX & KILSHEIMER LLP 1999 Harrison Street, Suite 1501 Oakland, California 94612 (415) 772-4704 [email protected]