Kaplan Fox Encourages Hyliion Holdings Corp. (HYLN) Investors to Contact the Firm Before the Lead Plaintiff Deadline on October 27, 2026

Kaplan Fox & Kilsheimer LLP announces that a class action lawsuit has been filed against Hyliion Holdings Corp. ("Hyliion" or the "Company") (NYSE American: HYLN) on behalf of investors that purchased or otherwise acquired Hyliion securities between May 12, 2026 and June 23, 2026 (the "Class Period"). CLICK HERE TO JOIN THE CASE If you are an investor in Hyliion 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. DEADLINE REMINDER: If you are a member of the proposed Class, you may move the court no later than October 27, 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 12, 2026, according to the complaint, Hyliion announced a partnership with VFG Holdings LLC ("VFG") by means of a letter of intent ("LOI") to provide power modules to support data center applications. Further, the complaint alleges that after this announcement, Hyliion's stock appreciated over the next several days from a closing price of $2.68 per share on May 12, 2026 to close at $4.67 per share on May 15, 2026. According to the complaint, Defendants made false and misleading statements "in order to cause rapid price appreciation in Hyliion stock" and "to insider trade," among other things. Then, on June 23, 2026, according to the complaint, Pelican Way Research issued a report alleging that the announced LOI with VFG "is a sham because the counterparty (VFG Holdings, or legally VFG Tech Holdings, LLC) does not appear to have any substance." On this news, the complaint alleges the price of Hyliion stock fell $1.27, or 17.2%, on June 23, 2026 and declined an additional $1.18 per share, or 19.3%, on June 24, 2026 to close at $4.92 per share.

WHY CONTACT KAPLAN FOX? 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 & KILSH...