Amentum Holdings Inc.Amentum-led OneAxIoM named preferred supplier on $2.78B Sellafield framework, deepening its nuclear asset-care revenue base.

Sellafield Ltd. has selected an Amentum-led joint venture, OneAxIoM, as preferred supplier for its Projects and Asset Care Execution framework, a US$2.78 billion (£2.1 billion) program covering full lifecycle services for spent fuel management and related facilities. The framework carries an initial nine-year term with an optional six-year extension. Once contract terms are finalized, the preferred supplier status would deepen Amentum's presence in complex nuclear asset care, potentially broadening its long-cycle revenue base and reinforcing its capabilities in high-specification engineering and project delivery. The selection follows Amentum's up to US$406 million GBE N owner's engineer role for the UK small modular reactor program, underlining how much of the company's story now rests on long-duration nuclear and infrastructure work. Amentum's narrative projects $15.1 billion in revenue and $532.2 million in earnings by 2029, requiring 2.2% yearly revenue growth and about a $328 million earnings increase from $204.0 million today.
Amentum Holdings Inc.Amentum-led OneAxIoM named preferred supplier on $2.78B Sellafield framework, deepening its nuclear asset-care revenue base.
Central Holding Group Co LtdOneAxIoM, the Amentum-led JV, was selected as preferred supplier for the $2.78B Sellafield framework.
Sellafield Ltd. is the buyer selecting the preferred supplier; no financial impact on it is described.