Grabar Law Office is investigating claims on behalf of York Space Systems Inc. (NYSE: YSS) shareholders concerning whether certain officers and directors breached their fiduciary duties to the Company.

If you have continuously owned York Space Systems Inc. (NYSE: YSS) shares since on or shortly after the Company’s January 29, 2026 IPO, you can pursue corporate reforms, the return of funds back to the company, and a court approved incentive award at no cost to you whatsoever.  Please contact Joshua H. Grabar at jgrabar@grabarlaw.com, or call 267-507-6085 to learn more. Alternatively, if you purchased shares between January 29, 2026 and May 11, 2026, you could participate in the class action.

York Space Systems, Inc. operates as a space and defense prime providing a comprehensive suite of mission-critical solutions for national security, government and commercial customers in the United States. It provides space and defense primes with proprietary hardware and software capabilities designed to address customers’ requirements across the elements of the space ecosystem throughout the mission lifecycle. The company also engages in the design, production, integration, and operation of spacecraft to manage spacecraft and constellations. It offers S-CLASS, LX-CLASS, and M-CLASS spacecraft, which are satellite platforms to a range of space market needs. In addition, the company provides software that enables versatile integration of a variety of payloads for customers and supply chain commonalities across platforms, as well as software-enabled services.

As alleged in an underlying securities fraud class action, York Space Systems Inc. (NYSE: YSS), through certain of its officers, made materially false and misleading statements and failed to disclose in the Company’s IPO’s offering documents and thereafter that: (i) York Space’s onboard mission and payload software was not fully functional before satellites were launched; (ii) this ongoing trend presented a risk to York Space’s contracts with the SDA; and (iii) as a result of the foregoing, defendants’ positive statements about York Space’s business, operations, and prospects, were materially misleading and/or lacked a reasonable basis.

The York Space class action lawsuit further alleges that on May 11, 2026, at approximately 10 a.m. EST, Wolfpack Research published a short report entitled “YSS: Lost In Space – The Pentagon Just Killed 96% of York’s Revenue.”  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,” and allegedly raised suspicions that the Pentagon’s decision to eliminate the Tranche 3 funding was “rooted in severe disappointment in York.”

Grabar Law Office’s Investigation

Grabar Law Office is investigating whether York Space Systems’ officers and directors adequately discharged their fiduciary duties in connection with the Company’s oversight of the development, testing, and operational readiness of its satellite software; York Space’s representations regarding the functionality and modularity of its satellite platforms and its performance under contracts with the Space Development Agency; the accuracy and completeness of the Company’s Registration Statement and other public disclosures concerning those matters; and the Board’s oversight of the operational, contractual, and disclosure risks associated with York Space’s substantial dependence on the SDA.

What Is a Shareholder Derivative Action?

A shareholder derivative action is brought on behalf of a company to address harm allegedly caused to the company by its officers or directors. Unlike a securities class action, which ordinarily seeks compensation for investors who purchased securities during a specified period and suffered investment losses, a derivative action seeks relief for the benefit of the company.

Potential relief may include monetary recovery for the company, improvements to corporate-governance practices, strengthened disclosure and compliance procedures, changes to executive-compensation or insider-trading controls, and a court approved incentive award.

Who May Have Rights?

Current York Space shareholders who have continuously held their shares since the company went public On January 29, 2026 can pursue derivative claims on behalf of the Company.

Request a Confidential Shareholder Review

If you have continuously held York shares since on or shortly after its January 29, 2026, IPO you should contact Grabar Law Office to discuss your rights. You can pursue corporate reforms, the return of funds back to the company, and a court approved incentive award at no cost to you whatsoever.  Please contact Joshua H. Grabar at jgrabar@grabarlaw.com, or call 267-507-6085 to learn more.

There is no cost or obligation associated with requesting an evaluation or participating in the litigation whatsoever.