York Space Systems Inc. (NYSE: YSS) Securities Fraud Class Action

The York Space Systems Inc. securities fraud class action lawsuit was filed on behalf of those who purchased or otherwise acquired York Space Systems Inc. (“York”) (NYSE: YSS) (1) common stock pursuant and/or traceable to the registration statement and related prospectus (collectively, the “Offering Documents”) issued in connection with the company’s initial public offering conducted on or about January 29, 2026; and/or (2) securities between January 29, 2026 and May 11, 2026, inclusive (the “Class Period”). Captioned Ianelli v. York Space Systems Inc., No. 26-cv-04074 (D. Colo.), the York class action lawsuit alleges that York and/or certain of its officers and/or directors violated federal securities laws by making false or misleading statements and/or omitted to disclose material information.

If you lost money as a result of your York investment and want to find out more about this action and your rights, fill out the form on this page or contact attorney Jonathan Naji, Esq. of KTMC by calling (484) 270-1453 or via e-mail at [email protected]. 

COMPLAINT ALLEGATION SUMMARY:
York is a space and defense company that designs, builds, and sells satellites and related components and services. For fiscal year 2025, 96% of York’s revenue came from projects contracted by the U.S. Federal Government through the Pentagon’s Space Development Agency (“SDA”), and specifically under the SDA’s Transport Layer program, which is an experimental military satellite constellation designed to provide global
tactical data.

The complaint alleges that, in the Offering Documents and throughout the Class Period, Defendants made materially false and/or misleading statements, as well as failed to disclose material facts about the company’s business, operations, and prospects. Specifically, Defendants misrepresented and/or failed to disclose that: (1) York’s onboard mission and payload software was not fully functional before satellites were launched; (2) the company’s repeated issues with functionality created a risk to its contracts with the SDA; and (3) as a result of the foregoing, Defendants’ statements about the company’s business, operations, and prospects were materially false and misleading and/or lacked a reasonable basis at all relevant times.

WHY DID YORK’S STOCK DROP?
The U.S. Space Force released its Spring 2026 budget on April X, 2026, revealing that it was restructuring the SDA’s Transport Layer program and immediately halting the third tranche of Transport Layer payments. These payments, which had been expected to substantially benefit York, would instead fund the new Space Data Network.

On May 11, 2026, Wolfpack Research published a short report titled “YSS: Lost In Space — The Pentagon Just Killed 96% of York’s Revenue.” The report stated in part that it speculates 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 report went on to reveal, among other things, that former York employees had claimed that the company “sent satellites into space without even knowing if the software was fit to accomplish its basic mission,” and that the satellites “simply did not function as expected because the company did not finish developing the software for these satellites before launching them,” and waited until they were in orbit to fully debug them.

On this news, the price of York’s stock fell by $7 per share, or approximately 21%.

THE LEAD PLAINTIFF PROCESS:
The Private Securities Litigation Reform Act of 1995 permits any investor who purchased or acquired York securities during the Class Period to seek appointment as lead plaintiff in the York class action lawsuit. A lead plaintiff is a representative party that acts on behalf of other class members in directing the litigation. In order to be appointed lead plaintiff, the Court must determine that the class member’s claim is typical of the claims of other class members, and that the class member will adequately represent the class. Your ability to share in any recovery is not, however, affected by the decision whether or not to serve as a lead plaintiff. Filling out the online form above or communicating with any counsel is not necessary to participate or share in any recovery achieved in this case. Any member of the purported class may move the court to serve as a lead plaintiff through counsel of his/her choice, or may choose to do nothing and remain an inactive class member.

ABOUT KESSLER TOPAZ MELTZER & CHECK, LLP:
Kessler Topaz Meltzer & Check, LLP (KTMC) is a leading U.S. plaintiff-side law firm focused on securities-fraud class actions and global investor protection. The firm represents individual investors as well as institutions, such as major pension funds, asset managers, and international investors. KTMC has led some of the largest recoveries in securities litigation and has been recognized by peers and the legal media with numerous accolades, including being recognized in Chambers & Partners USA 2026 as a Band 1 Top Firm in Securities and Class Actions, Legal 500’s Tier 1 Rankings for Securities and M&A Litigation, The National Law Journal’s Plaintiff’s Hot List and Trailblazers in Plaintiffs’ Law, BTI Consulting Group’s Honor Roll of Most Feared Law Firms, The Legal Intelligencer’s Class Action Firm of the Year, Lawdragon’s Leading Plaintiff Financial Lawyers, and Law360’s Titans of the Plaintiffs Bar. The firm operates globally with offices in Pennsylvania and California. KTMC has recovered over $25 billion for our clients and the classes they represent.