Philadelphia, Pennsylvania--(Newsfile Corp. - September 1, 2026) - Grabar Law Office is investigating potential claims on behalf of shareholders of Hyliion Holdings Corp. (NYSE American: HYLN).

What is This Investigation About? The investigation concerns whether certain Hyliion officers and directors breached the fiduciary duties they owed to the Company as it pertains to Hyliion's Disclosures Regarding Its VFG Holdings Partnership and Alleged Insider Stock Sales.

If you purchased Hyliion Holdings Corp. (NYSE: HYLN) shares prior to May 12, 2026 and still hold shares today, you are encouraged to visit https://grabarlaw.com/the-latest/hyliion-shareholder-investigation/, contact Joshua Grabar at jgrabar@grabarlaw.com, or call us at (267) 507-6085. You can seek corporate governance reforms, the return of funds back to the company, and a court approved incentive award at no cost to you whatsoever.

What is Alleged? On August 28, 2026, a federal securities fraud class action complaint was filed against Hyliion and certain of its officers in the United States District Court for the Western District of Texas. According to the complaint, Hyliion announced on May 12, 2026 that it had entered into a non-binding letter of intent with VFG Holdings, LLC ("VFG") establishing what the Company described as a strategic partnership involving the potential deployment of KARNO Power Modules for data-center applications. Hyliion stated that the parties intended to pursue opportunities involving as many as 250 KARNO Cores, representing approximately 50 megawatts of power-generation capacity, over a five-year period.

The underlying class action complaint alleges that Hyliion materially overstated the prospects and significance of the VFG relationship. Among other things, the complaint alleges that VFG had only been formed in January 2026, appeared to have approximately four employees, maintained a website containing limited information, and appeared to have publicized no meaningful business activity apart from its announced relationship with Hyliion.

The complaint further alleges that Hyliion officers sold Company shares shortly after the VFG announcement pursuant to Rule 10b5-1 trading plans. The cited transactions include the reported sale of 30,000 shares by Chief Executive Officer Thomas Healy for approximately $125,000 and 15,000 shares by Chief Financial Officer Jon Panzer for approximately $61,000.

On June 23, 2026, Pelican Way Research published a report questioning the substance of the proposed VFG transaction and VFG's apparent ability to carry it out. According to the complaint, Hyliion's stock price declined approximately 17.2% on June 23, 2026 and an additional 19.3% on June 24, 2026.

Grabar Law Office is investigating whether Hyliion's officers and directors adequately discharged their fiduciary duties in connection with the Company's evaluation of VFG, Hyliion's public statements concerning the proposed partnership, the Board's oversight of the Company's disclosure controls, and the adoption and administration of insider trading plans.

What Can You Do Now? If you acquired Hyliion Holdings Corp. (NYSE: HYLN) shares before May 12, 2026, have continuously held those shares, and still own Hyliion stock today, you are encouraged to visit https://grabarlaw.com/the-latest/hyliion-shareholder-investigation/, contact Joshua H. Grabar at jgrabar@grabarlaw.com or call (267) 507-6085. Eligible shareholders may be able to seek corporate-governance reforms, the return of funds to the Company, and, where appropriate and subject to court approval, an incentive award-all at no cost to them.

About Grabar Law Office

Grabar Law Office represents investors and shareholders in securities, shareholder derivative, corporate-governance, and other complex litigation involving publicly traded companies nationwide.

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Source: Grabar Law Office