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Amentum Holdings (AMTM) Lands NNSA AI Project As Undervalued Narrative Faces A Fresh Test

Simply Wall St·07/21/2026 17:19:47
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Amentum Holdings (AMTM) stock is in focus after the company was chosen by the U.S. Department of Energy’s National Nuclear Security Administration to negotiate a landmark public-private artificial intelligence and energy infrastructure project at Savannah River.

See our latest analysis for Amentum Holdings.

For investors tracking the bigger picture, Amentum Holdings’ recent NNSA announcement arrives after a period where the stock has lost momentum, with the year to date share price return down 30.58% and the 1 year total shareholder return declining 14.47% from a latest share price of $21.16. In the short term, the 1 day and 7 day share price returns of 2.32% and 3.57% suggest interest has picked up slightly following the news. However, the 90 day share price return, which is down 23.47%, indicates sentiment has been weaker over the past few months.

If you are looking beyond Amentum Holdings and want more ideas at the intersection of AI and infrastructure, it could be worth reviewing our screener for 54 AI infrastructure stocks

The recent bounce in Amentum Holdings after a weak few months puts a spotlight on what is really changing: the underlying contract and earnings profile, or just sentiment catching up after a sharp slide, and how that stacks up against today’s valuation.

Most Popular Narrative: 34.2% Undervalued

On the latest close, Amentum Holdings at $21.16 sits well below the most followed narrative fair value of $32.17, putting the focus on what assumptions support that gap.

Rapid build out of critical digital infrastructure, including 5G networks, hyperscaler data centers and secure cloud ready networks, is expected to sustain above company average growth in Digital Solutions and improve net margins as higher margin commercial and international work scales.

Read the complete narrative.

Curious what kind of revenue trajectory and margin lift would justify that higher fair value for Amentum Holdings? The narrative leans on compounding earnings, richer profitability and a future earnings multiple that needs to compress from today’s level yet still support a higher valuation. The full story is in how these moving parts fit together over time.

Result: Fair Value of $32.17 (UNDERVALUED)

Have a read of the narrative in full and understand what's behind the forecasts.

However, there are still real pressure points for the Amentum Holdings story, including potential execution missteps on large federal contracts and slower than expected progress on margins.

Find out about the key risks to this Amentum Holdings narrative.

Another View on Amentum Holdings Valuation

The first narrative leans on discounted cash flows to argue Amentum Holdings looks undervalued, but the P/E ratio tells a different story. At 34.9x earnings, the stock trades well above the US Professional Services industry on 21.8x and peers on 16.4x, and even above a fair ratio of 29.6x. That gap suggests investors are already paying a premium, so the key question is whether future execution justifies that extra multiple.

For a closer look at how this compares to where the market could reset the ratio over time, take a look at the valuation breakdown, starting with the fair ratio view, in the See what the numbers say about this price — find out in our valuation breakdown.

NYSE:AMTM P/E Ratio as at Jul 2026
NYSE:AMTM P/E Ratio as at Jul 2026

Next Steps

If the mixed signals around Amentum Holdings leave you on the fence, use the full data set to move quickly and shape your own view with the 3 key rewards and 2 important warning signs.

Looking for more investment ideas beyond Amentum Holdings?

If you want to keep sharpening your edge, do not stop at Amentum Holdings. Use Simply Wall St's screeners to uncover other stocks that might fit your approach.

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.