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 to be overvalued given its current price of 22.41, especially when considering its significant decline of 29.62% over the past year compared to the S&P 500's gain of 12.65%.
Key valuation ratios are not available for Amentum, but the lack of comparative metrics suggests a concerning position relative to peers in the Aerospace & Defense industry. Notably, the company has underperformed in the short term, with a 1-month return of -11.25% against the S&P 500's modest gain of 0.21%. Overall, Amentum Holdings, Inc. is assessed as overvalued in the current market context.