As of October 2026 Amentum has a market cap of โน456.22 Billion. This makes Amentum the world's 3259th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Oct 10th, 2026 the market cap of Amentum was reported to be: