Hyliion Holdings Corp. (NYSE:HYLN), a leading provider of innovative KARNO™ Power Modules, announced today that they were selected by the Department of the Air Force and the Department of Defense's Chief Digital and Artificial Intelligence Office (CDAO) to respond to a validated operational requirement within the Air Force to maintain critical operations during fuel supply disruptions by allowing seamless transitions between available fuels.

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Having achieved "Awardable" status, Hyliion can now directly support the Air Force's transition toward more resilient energy sources, reducing reliance on one fuel and enabling integration of alternative fuels in-line with DoD energy strategy. Hyliion was selected through the CDAO's innovative solicitation process known as the Tradewinds Solutions Marketplace, which is designed to accelerate the procurement and adoption of mission critical technologies, such as Artificial Intelligence, Machine Learning, and resilient energy technologies.

"The Air Force leveraged the Tradewinds solicitation process to quickly collaborate with innovative American companies to enhance our ability to maintain critical operations during fuel supply disruptions, simplify logistics, and reduce procurement and maintenance costs over time," said Mr. Kirk Phillips, Director, Air Force Office of Energy Assurance.

"Being featured on the Tradewinds Solutions Marketplace is a significant milestone for Hyliion," said Thomas Healy, Founder and CEO of Hyliion. "It validates the strategic value of our KARNO technology and underscores our commitment to supporting government missions. We are excited to play a role in reducing logistical burdens and increasing agility by eliminating the need for separate generators for each fuel type."

The KARNO system's versatility across fuel types and its superior environmental footprint makes it ideal for dynamic and remote deployment scenarios where resilience, efficiency, and sustainability are paramount.

Hyliion was recognized among a competitive field of applicants to the Tradewinds Solutions marketplace whose solutions demonstrated innovation, scalability, and potential impact on DoD missions. Government customers interested in viewing the video solution can create a Tradewinds Solutions Marketplace account at tradewindAI.com.

About Hyliion

Hyliion is committed to 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 the commercial and waste management industries with a locally deployable KARNO^TM 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. The Company aims to offer innovative, yet practical solutions that contribute positively to the environment in the energy economy. Visit www.hyliion.com to learn more.

About the Tradewinds Solutions Marketplace

The Tradewinds Solutions Marketplace is a digital repository of post-competition, readily awardable pitch videos that address the Department of Defense's (DoD) most significant challenges in the Artificial Intelligence/Machine Learning (AI/ML), data, and analytics space. All awardable solutions have been assessed through complex scoring rubrics and competitive procedures and are available to Government customers with a Marketplace account. Government customers can create an account at www.tradewindai.com. Tradewinds is housed in the DoD's Chief Digital Artificial Intelligence Office.

For more information or media requests, contact: Success@tradewindai.com

About the Air Force Office of Energy Assurance

The Air Force Office of Energy Assurance (AF OEA), a directorate of the Air Force Civil Engineer Center (AFCEC), develops energy solutions that close energy resilience gaps and strengthen our nation's Air Force and Space Force installations at home and abroad. By leveraging the expertise of the energy community, AF OEA builds tailored energy solutions for each installation that are resilient, innovative, and cost-effective. For more information visit https://www.afcec.af.mil/energy

For more information or media requests, contact: Success@tradewindai.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, our status as an early stage company with a history of losses, and our expectation of incurring significant expenses and continuing losses for the foreseeable future; our ability to develop key commercial relationships with suppliers and customers; our ability to retain the services of Thomas Healy, our Chief Executive Officer; the expected performance of the KARNO generator and system; the execution of the strategic shift from our powertrain business to our KARNO business; our ability to comply with governmental regulations related to defense spending and procurement; the suitability of our products for defense applications; 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, 2025 for the year ended December 31, 2024 and in our subsequently filed Forms 10-Q. 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.

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Hyliion Holdings Corp.

press@hyliion.com

Investor Relations

ir@hyliion.com

Hyliion KARNO Power Module selected by US Air Force and DOD Chief Digital and Artificial Intelligence Office Under Military Multi-Fuel Initiative