[July 20, 2026]

Amentum Selected for the Department of Energy AI Data Center and Energy Generation Project

Amentum (NYSE: AMTM) has been selected by the U.S. Department of Energy's National Nuclear Security Administration (NNSA) to enter negotiations for a phased lease to develop one of the nation's largest integrated artificial intelligence and energy infrastructure projects at the Savannah River Site (SRS) in South Carolina. Once finalized, the public-private project would establish a 1-gigawatt artificial intelligence data center supported by approximately 2 gigawatts of on-site energy generation, initially powered by natural gas bridging to advanced nuclear energy.

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data center stock footage

"Artificial intelligence, energy resilience, and national security are becoming increasingly interconnected, creating new opportunities to strengthen America's strategic advantage," said John Heller, Chief Executive Officer of Amentum. "Amentum is uniquely positioned at that intersection, combining deep engineering expertise, trusted mission execution, and decades of partnership with the U.S. government. This agreement gives us the opportunity to partner with the NNSA to deliver infrastructure that will help power the technologies shaping our nation's future."

Artificial intelligence is transforming the way governments, industries and societies operate - and its continued advancement depends on resilient, secure energy infrastructure capable of powering the next generation of computing.

"For generations, Amentum has helped solve some of the nation's most complex engineering and nuclear challenges, including at the Savannah River Site," said Mark Whitney, president of Amentum's Energy & Environment business. "This opportunity builds on that legacy by bringing together our expertise in nuclear operations, infrastructure development, and program delivery to help our customer safely and securely accelerate the next generation of AI and energy infrastructure."

The SRS data center project is designed to accelerate domestic AI computing capacity, expand reliable power generation, and demonstrate how public-private parterships can advance innovative technologies while strengthening America's critical infrastructure. As demand for advanced technologies continues to grow, Amentum remains committed to delivering the engineering excellence, trusted partnerships, and mission-focused innovation that help customers strengthen national security, enhance energy resilience, and build the critical infrastructure that will define the future.

About Amentum
Amentum is a global leader in advanced engineering and innovative technology solutions, trusted by the United States and its allies to address their most significant and complex challenges in science, security and sustainability. Our people apply undaunted curiosity, relentless ambition and boundless imagination to challenge convention and drive progress. Our commitments are underpinned by the belief that safety, collaboration and well-being are integral to success. Headquartered in Chantilly, Virginia, we have approximately 50,000 employees in more than 70 countries across all seven continents.

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Forward-Looking Statements
This press release contains or incorporates by reference statements by Amentum Holdings, Inc. (the "Company") that relate to future events and expectations and, as such, constitute "forward-looking statements" as that term is defined in the Private Securities Litigation Reform Act of 1995 and other federal securities laws. These forward-looking statements may be characterized by terminology such as "believe," "project," "expect," "anticipate," "estimate," "forecast," "outlook," "target," "endeavor," "seek," "predict," "intend," "strategy," "plan," "may," "could," "should," "will," "would," "will be," "will continue," "will likely result," or the negative thereof or variations thereon or similar terminology generally intended to identify forward-looking statements. All statements, other than historical facts, including, but not limited to, statements regarding the anticipated work and revenue under the awarded contract, and the Company's objectives, expectations and intentions, applicable legal, economic and regulatory conditions, and any assumptions underlying any of the foregoing, are forward-looking statements.

A number of important factors could cause actual results to differ materially from those contained in or implied by these forward-looking statements, including those factors discussed in our filings with the Securities and Exchange Commission (SEC), including, among others: the occurrence of an accident or safety incident; the ability of the Company to control costs, meet performance requirements or contractual schedules; and other factors set forth under Item 1A, Risk Factors in our Annual Report on Form 10-K for the fiscal year ended September 27, 2024, which can be found at the SEC's website at www.sec.gov or the Investor Relations portion of our website at www.amentum.com. Any forward-looking statement speaks only as of the date on which it is made, and the Company assumes no obligation to update or revise such statement, whether as a result of new information, future events or otherwise, except as required by applicable law.

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