• In March 2026, Great British Energy – Nuclear awarded a long-term US$406 million (£300 million), up-to-14-year owner’s engineer contract to Litmus Nuclear, a joint venture led by Amentum with Cavendish Nuclear, to support Rolls-Royce SMR deployment at the Wylfa small modular reactor site in North Wales.
• This mandate gives Amentum a central technical role in the UK’s first SMR rollout, reinforcing its position in complex, regulated clean energy infrastructure projects.
• We’ll now examine how winning this long-duration UK SMR engineering role could influence Amentum’s investment narrative and future growth mix.

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Amentum Holdings Investment Narrative Recap

To own Amentum, you need to believe in its ability to convert a large, long cycle government and nuclear backlog into steadier earnings while managing execution on complex programs. The new US$406 million SMR owner’s engineer award should support that thesis by deepening its nuclear mix, but it does not materially change the near term focus on delivering existing marquee contracts and avoiding schedule or cost issues on them.

The most directly related recent development is Amentum’s US$112 million European nuclear decommissioning and waste management contract, which, like the UK SMR role, leans on its nuclear engineering and assurance credentials. Together, these wins underscore how nuclear work is becoming a more visible part of the growth story, even as investors still need to watch how quickly the broader “nuclear renaissance” and SMR pipeline actually convert into revenue.

Yet behind these long term opportunities, investors should be aware that...

Amentum Holdings' narrative projects $15.4 billion revenue and $501.1 million earnings by 2028. This requires 2.4% yearly revenue growth and about a $435 million earnings increase from $66.0 million today.

Uncover how Amentum Holdings' forecasts yield a $33.45 fair value, a 27% upside to its current price.

Exploring Other Perspectives

Six fair value estimates from the Simply Wall St Community span roughly US$20 to US$66 per share, showing how far apart individual views can be. Against this wide range, Amentum’s expanding nuclear portfolio as a potential earnings driver sits alongside unresolved questions about how slowly SMR deployment could progress, so you may want to compare several of these perspectives before forming your own view.

Explore 6 other fair value estimates on Amentum Holdings - why the stock might be worth 23% less than the current price!

Reach Your Own Conclusion

Don't just follow the ticker - dig into the data and build a conviction that's truly your own.

• A great starting point for your Amentum Holdings research is our analysis highlighting 4 key rewards and 2 important warning signs that could impact your investment decision.
• Our free Amentum Holdings research report provides a comprehensive fundamental analysis summarized in a single visual - the Snowflake - making it easy to evaluate Amentum Holdings' overall financial health at a glance.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.