With a market capitalization (market cap) of $5.11B — a measure of how much the company is worth — Amentum Holdings, Inc. is the 1404th most valuable company in Industrials as of August 18, 2026. Shares trade at $20.95, up +2.55% on the day.
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Amentum Holdings, Inc. is a provider of critical, technology-driven services, serving both governmental and commercial sectors. Its operations are structured around two distinct segments: Critical Mission Solutions and Cyber & Intelligence. The Critical Mission Solutions (CMS) segment delivers comprehensive support across various domains. This includes testing, training, and operational oversight for advanced missile defense systems. It also furnishes IT and engineering expertise to both defense organizations and the burgeoning space sector. Moreover, CMS offers technological solutions to energy clients, encompassing installation, decommissioning, and vital environmental remediation efforts, in addition to specialized technical consulting services. Meanwhile, the Cyber & Intelligence (C&I) segment focuses on advanced cyber training and sophisticated data analytics for government professionals. It also deploys cutting-edge communication systems and aerial mapping technologies for national security applications, alongside other specialized technical support for U.S. defense and intelligence agencies. Established on November 26, 2019, the company maintains its corporate headquarters in Chantilly, VA.
Visit websiteAs of August 18, 2026, Amentum Holdings, Inc. (AMTM) is worth $5.11B — this is its market capitalization, the total value of all its outstanding shares.
Amentum Holdings, Inc.’s market cap is $5.11B, which ranks it #1404 among the most valuable companies in the Industrials sector tracked on MarketCapLens.
Amentum Holdings, Inc. (AMTM) shares trade at $20.95, up 2.55% on the day, as of August 18, 2026.
Amentum Holdings, Inc. trades at a price-to-earnings (P/E) ratio of 77.6, based on its latest share price and annual earnings per share.
Fundamentals are annual. Figures labeled with their fiscal year.
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