Is Amentum Holdings, Inc. overvalued or undervalued?

As of 7 November 2025, the valuation grade for Amentum Holdings, Inc. has moved from attractive to very expensive, indicating a shift towards overvaluation. The company appears overvalued given its current price of $22.41, especially when considering the recent performance metrics. The price-to-earnings (P/E) ratio is not available, but the absence of a valuation metric suggests a lack of favorable comparisons within its peer group.
In terms of peer comparison, Amentum Holdings is evaluated against other companies in the Aerospace & Defense industry, but specific ratios are not provided for direct comparison. Notably, the stock has underperformed against the S&P 500, with a year-to-date return of 6.56% compared to the S&P 500's 14.40%, and a one-year return of -29.62% against the S&P's 12.65%. This underperformance reinforces the conclusion that Amentum Holdings is currently overvalued.