Hyliion's KARNO Power Module named to TIME's Best Inventions of 2026. TIME recognizes Hyliion's breakthrough KARNO Power Module for its potential to transform how electricity is generated AUSTIN, Texas-(BUSINESS WIRE)-Hyliion Holdings Corp. (NYSE American: HYLN), a developer of modular power plant technology, today announced that its KARNO(TM) Power Module has been named to TIME's Best Inventions of 2026, an annual list recognizing groundbreaking innovations shaping the future. As global electricity demand accelerates, driven in large part by the rapid growth of AI, Hyliion is reimagining how power is generated. The KARNO Power Module is designed to deliver highly efficient, cost-effective electricity generation in a compact, scalable modular system that produces power directly where it is needed. The technology is designed for critical applications, including data centers and military operations. Hyliion's defense programs include a contract to power the U.S. Navy's USX-1 Defiant autonomous vessel, alongside nearly $50 million in new U.S. military programs expected to be awarded in 2026. Unlike conventional generators that rely on internal combustion engines or rotating turbines, the KARNO technology utilizes a proprietary linear heat generator architecture enabled by advanced additive manufacturing. The technology is designed to deliver efficient, fuel-flexible, low-emission power generation, scalable from hundreds of kilowatts to multi-megawatt installations. "Being recognized by TIME as one of the Best Inventions of 2026 is an incredible honor and a testament to our team," said Thomas Healy, Founder and CEO of Hyliion. "We set out to fundamentally rethink how electricity is generated, aiming to bring power plant-level performance directly to where it's needed. After years of engineering and development, seeing our KARNO Power Module recognized among the world's most innovative technologies is a tremendous milestone, and we believe this is just the beginning." To compile this year's list, TIME solicited nominations from TIME editors and correspondents around the world, as well as through an online application process, paying special attention to growing fields such as health care and AI. TIME then evaluated each contender on key factors, including originality, efficacy, ambition, and impact. About Hyliion Hyliion is creating innovative solutions that enable clean, flexible and affordable electricity production. The Company's primary focus is to provide modular power plant technology that can operate on various fuel sources to future-proof against an ever-changing energy economy. Headquartered in Austin, Texas, and with research and development in Cincinnati, Ohio, Hyliion is initially targeting data center, military, and commercial and industrial applications with a locally deployable KARNO Power Module that can offer prime power as well as energy arbitrage opportunities. Beyond stationary power, Hyliion will address mobile applications such as vehicles and marine vessels. The Company aims to offer innovative yet practical solutions that contribute positively to the environment in the energy economy. For further information, please visit www.hyliion.com. Forward-Looking Statements The information in this press release includes "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other than statements of present or historical fact included in this press release, regarding Hyliion and its future financial and operational performance, as well as its strategy, future operations, estimated financial position, estimated revenues and losses, projected costs, prospects, plans and objectives of management are forward-looking statements. When used in this press release, including any oral statements made in connection therewith, the words "could," "should," "will," "may," "believe," "anticipate," "intend," "estimate," "expect," "project," the negative of such terms and other similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain such identifying words. These forward-looking statements are based on management's current expectations and assumptions about future events and are based on currently available information as to the outcome and timing of future events. Except as otherwise required by applicable law, Hyliion expressly disclaims any duty to update any forward-looking statements, all of which are expressly qualified by the statements herein, to reflect events or circumstances after the date of this press release. Hyliion cautions you that these forward-looking statements are subject to numerous risks and uncertainties, most of which are difficult to predict and many of which are beyond the control of Hyliion. These risks include, but are not limited to, its status as an early-stage company with a history of losses; its expectation of incurring significant expenses and continuing losses for the foreseeable future; its ability to develop key commercial relationships with suppliers and customers; its ability to retain the services of Thomas Healy, its Chief Executive Officer; the expected performance of the KARNO generator and system; the execution of the strategic shift from its powertrain business to its KARNO business, and the other risks and uncertainties described under the heading "Risk Factors" in our SEC filings including in our Annual Report (See item 1A. Risk Factors) on Form 10-K filed with the Securities and Exchange Commission (the "SEC") on February 25, 2026 for the year ended December 31, 2025 and its subsequently filed Form 10-Qs. Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements. Should one or more of the risks or uncertainties described in this press release occur, or should underlying assumptions prove incorrect, actual results and plans could differ materially from those expressed in any forward-looking statements. Additional information concerning these and other factors that may impact Hyliion's operations and projections can be found in its filings with the SEC. Hyliion's SEC filings are available publicly on the SEC's website at www.sec.gov, and readers are urged to carefully review and consider the various disclosures made in such filings.

Hyliion Holdings Corp. (HYLN) shareholders who lost Money have opportunity to lead securities fraud lawsuit. Sep 24, 2026, 14:50 ET LOS ANGELES, Sept. 24, 2026 /PRNewswire/ - Glancy Prongay Wolke & Rotter LLP announces that investors with losses have opportunity to lead the securities fraud class action lawsuit against Hyliion Holdings Corp. IF YOU SUFFERED A LOSS ON YOUR HYLIION HOLDINGS CORP. INVESTMENTS, CLICK HERE BEFORE OCTOBER 27, 2026 (LEAD PLAINTIFF DEADLINE) TO PARTICIPATE IN THE SECURITIES FRAUD LAWSUIT What Is The Lawsuit About? The complaint filed in this class action alleges that between May 12, 2026 and June 23, 2026, Defendants made materially false and/or misleading statements, as well as failed to disclose material adverse facts about the Company's business, operations, and prospects. Specifically, Defendants failed to disclose to investors that: (1) in order to cause rapid price appreciation in Hyliion stock, Defendants announced a deal with an entity that was very recently formed and does not appear to have any actual business operations; (2) the Individual Defendants timed the announcement and foregoing price appreciation to insider trade; and (3) as a result, Defendants' statements about Hyliion's business, operations, and prospects, were materially false and misleading and/or lacked a reasonable basis at all relevant times. What's The Next Step? Glancy Prongay Wolke & Rotter LLP is a leading national shareholder rights law firm, ready to assist you in potentially pursuing claims to recover your loss. If you wish to serve as lead plaintiff, you must move the Court no later October 27, 2026. Please contact us to learn more about your rights and interests by clicking here, by email ([email protected]), or by telephone at 310-201-9150 (Toll-Free: 888-773-9224). You may retain counsel of your choice. If you bought securities during the class period, you may take no action and remain an absent class member. No class has been certified yet. Why Glancy Prongay Wolke & Rotter LLP? GPWR is a premier law firm with decades of experience representing investors and consumers in securities litigation and other complex class action litigation. Recognizing the firm's recent successes, GPWR was named one of Law360's Securities Groups of the Year and ranked 2nd in total investor recoveries by Institutional Shareholder Services Securities Class Action Services in 2025. GPWR's lawyers have handled cases covering a wide spectrum of corporate misconduct and relating to nearly all industries and sectors. GPWR's past successes have been widely covered by leading news and industry publications such as The Wall Street Journal, The Financial Times, Bloomberg Businessweek, Reuters, the Associated Press, Barron's, Investor's Business Daily, Forbes, and Money. Prior results do not guarantee a similar outcome. Contact Us: Glancy Prongay Wolke & Rotter LLP, 1925 Century Park East, Suite 2100, Los Angeles, CA 90067 Charles Linehan Email: [email protected] Telephone: 310-201-9150 Toll-Free: 888-773-9224 Visit our website at: www.glancylaw.com. SOURCE Glancy Prongay Wolke & Rotter LLP

Shareholders who lost money in shares of Hyliion Holdings Corp. (NYSE:HYLN) should contact Wolf Haldenstein Immediately. Stock score locked: want to see it? Benzinga Rankings give you vital metrics on any stock - anytime. NEW YORK, Sept. 07, 2026 (GLOBE NEWSWIRE) - Wolf Haldenstein Adler Freeman & Herz LLP ("Wolf Haldenstein"), a nationally recognized securities litigation law firm, announces that a securities class action lawsuit has been filed in the United States District Court for the Western District of Texas against Hyliion Holdings Corp. (NYSE:HYLN) ("Hyliion" or the "Company"), on behalf of all investors who purchases Hyliion shares between May 12, 2026 and June 23, 2026, inclusive (the "Class Period"). Investors who purchased Hyliion shares during the class period and suffered losses may be eligible to participate in the case, with the lead-plaintiff deadline set for October 27, 2026. The filed Complaint alleges that: * On May 12, 2026, Hyliion announced a non-binding Letter of Intent (LOI) with VFG Holdings ("VFG") involving up to 250 KARNO Cores / 50 MW of potential data-center power deployments over five years. * The lawsuit alleges Hyliion presented the VFG relationship and its broader commercial pipeline more positively than was justified by the underlying facts. * HYLN rose sharply after the May announcement. * On June 23, 2026, Pelican Way Research published a report questioning whether VFG had the operational and financial substance to execute the proposed deal. * On this news, 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. This illustrious firm, founded in 1888, is steadfast in their pursuit of justice for investors who have suffered financial harm due to these misrepresented statements. The law firm brings to the fore over 125 years of legal expertise in securities litigation and has a proven record of protecting the rights of investors. We encourage all investors who have been affected or have information that will assist in our investigation, to contact Wolf Haldenstein Adler Freeman & Herz LLP. There is no cost or obligation to speak with an attorney.