Amentum Joint Venture Secures Preferred Position for Major UK Nuclear Contract

CHANTILLY, Va.--(BUSINESS WIRE)--Sep 30, 2026--

United Kingdom nuclear site operator Sellafield Ltd has selected an Amentum (NYSE: AMTM) joint venture as preferred supplier for an asset care and asset creation program valued at up to $2.78 billion (£2.1 billion).

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Under the Projects and Asset Care Execution (PACE) framework contract, Amentum and its supply chain partners will support Sellafield Ltd’s spent fuel management and retrievals mission by providing full lifecycle capabilities including engineering and design, procurement, installation and plant modification, project management and controls, commissioning, dismantling, removal and ongoing asset care.

“Sellafield Ltd has selected us and our trusted suppliers because of our record of excellent delivery performance, collaborative behaviors and constant innovation and improvement, driven by application of technologies such as digital visualization and advanced robotics,” said John Heller, Chief Executive Officer of Amentum. “PACE provides a significant, long-term growth opportunity for Amentum at Sellafield, building on our existing capability and relationships while also enabling us to deliver a broader, integrated full lifecycle scope on higher value projects across engineering and asset care.”

"Our mission is to create a clean, safe and secure environment for future generations. To do this we must ensure our assets remain safe, reliable and fit for the future,” said Matthew Johns, Chief Engineer, Sellafield Ltd. “The PACE agreement is an important step to strengthen our asset care capability. It will provide the expertise we need to maintain a high standard of safe and efficient delivery.”

Formal award of the framework agreement will follow when final contractual arrangements are concluded.

Lot 1 of PACE will be delivered by OneAxIoM, a joint venture between Amentum and Mitie Plc, supported by key supply chain partners Assystem and Mott MacDonald. The initial contract duration is nine years, with an optional six-year extension.

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 7 continents.

Visit us at amentum.com to learn how we advance the future together.

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About Amentum in the UK

With more than 6,000 people in the UK, Amentum is the delivery partner for project and construction management services at Hinkley Point C; sole program and project management delivery partner at Sizewell C; and supports the UK’s existing nuclear power stations under a Lifetime Enterprise Agreement with EDF. It is a major supplier of engineering design, safety case and project management at Sellafield and other UK nuclear decommissioning sites and operates the country’s largest private sector complex of nuclear laboratories and engineering test facilities in Warrington.

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.

Image courtesy of Sellafield Ltd.

SEOUL, South Korea (AP) — South Korea’s spy agency said Wednesday that Ukrainian President Volodymyr Zelenskyy 's recent revelation of a supposedly secret transfer of two North Korean prisoners of war to the South was likely meant to generate public support in this Asian democracy for greater assistance to Ukraine.

Zelenskyy’s disclosure during his U.N. speech last week of the transfer of the captured soldiers has stunned South Korea and drawn strong protests. Seoul called on Kyiv to apologize and explain the violation of what it said was a nondisclosure agreement about the transfer. Ukraine denied agreeing to any such deal.

The fracas surrounding the revelation has shaken the traditionally good relations between Kyiv and Seoul but it's unclear if it would lead to something more dramatic.

The soldiers were among thousands sent by North Korea to help Russia repel a Ukrainian incursion into Russia’s Kursk border region as part of expanding cooperation between Pyongyang and Moscow. North Korea has supplied conventional weapons to Russia as well.

South Korea’s National Intelligence Service held a closed-door meeting with a parliament committee on Wednesday about the matter.

According to lawmaker Yoo Yeong-ha who attended the meeting, the committee was told there has been no apology or expression of regret from Ukraine — either through official or unofficial channels.

The intelligence service assessed that Zelenskyy likely disclosed the transfer with the intention to rally public support in South Korea in favor of supplying weapons and other assistance to Ukraine, Yoo said.

Yoo did not elaborate or say how the intelligence service made its assessment.

South Korea has sent humanitarian aid and other support to Ukraine but has refrained from sending weapons, in line with its policy of not supplying arms to countries actively engaged in conflict.

According to the intelligence service, the North Korean POWs arrived in South Korea in mid-September and have no major health issues, according to another lawmaker, Yun Kun-young, who was also present at the meeting. The agency said that while in Ukraine, the soldiers had expressed their desires to resettle in South Korea, according to Yun.

North Korea hasn't publicly commented on the transfer but has previously claimed major defections of its citizens were the result of South Korea abducting them or luring them to flee.

South Korean officials have said they were concerned about the safety of the two soldiers and their relatives back in North Korea. Experts say there were also concerns the transfer could trigger protests from the North and undermine efforts to restart Pyongyang's talks with the United States.

Yun also said the intelligence service estimates that about 9,000 North Korean soldiers were engaged in surveillance operations in the Kursk region.

He also added that the lawmakers were told Russia has given North Korea weapons technologies to support its military modernization plans but has been reluctant to transfer cutting-edge technology related to the construction of nuclear-powered submarines and intercontinental ballistic missiles.

The intelligence service has also assessed that the teenage daughter of North Korean leader Kim Jong Un has cemented her status as her father's likely heir after attending an array of different public events and getting more ceremonial treatment, Yun said.

He quoted the service as saying Kim's daughter — reportedly named Kim Ju Ae and around 13 — made about 30 public appearances together with her father so far this year, the highest figure in the corresponding period since she first appeared in public in late 2022.

Some experts caution against seeing her as her father's successor, citing North Korea’s extremely strong male-centered power hierarchy.

Yoo, the lawmaker, said the service described Kim's daughter as trying to project a more mature image by wearing women’s suits and pointed-toe heels. The intelligence agency has in the past made assessments of Kim Jong Un's health conditions by using artificial intelligence techniques, analyses of super-resolution video and other methods.

Also in the Wednesday meeting, the intelligence agency said Kim is still severely obese but has no signs of other health problems, Yun said.

President of Ukraine Volodymyr Zelenskyy, center, attends the United Nations General Assembly (UNGA) at the UN headquarters on Tuesday, Sept. 22, 2026. (Justin Tang/The Canadian Press via AP)