Amentum-Cavendish JV Wins $406M UK SMR Engineering Contract

Event summary

  • Amentum and Cavendish Nuclear form Litmus Nuclear JV to secure $406M (£300M) contract for UK’s first SMR program at Wylfa site.
  • 14-year agreement supports deployment of Rolls-Royce SMR technology, with focus on design, safety, and construction assurance.
  • Contract represents key milestone in UK’s clean energy strategy, following November 2025 site selection announcement.
  • Amentum leverages existing nuclear expertise from Hinkley Point C and Sizewell C projects.

The big picture

This contract positions Amentum as a key player in the UK’s nuclear renaissance, aligning with broader European energy security priorities amid transition from fossil fuels. The $406M deal represents one of the largest private sector investments in next-generation nuclear technology, signaling growing institutional confidence in SMR economics. Amentum’s involvement across multiple UK nuclear projects creates potential for operational synergies and cost efficiencies.

What we're watching

Execution Risk
Whether Amentum can deliver on 14-year contract timeline amid complex SMR deployment challenges.
Regulatory Dynamics
How UK regulatory framework evolves to support accelerated SMR approvals and deployment.
Market Expansion
The pace at which SMR technology gains traction beyond UK, particularly in other European markets.