Amentum Holdings, Inc. AMTM

Company Overview

Amentum Holdings, Inc. (NYSE: AMTM) is a government and engineering services company that provides advanced technical, mission support, logistics, and operational services primarily to U.S. federal agencies, allied governments, and commercial customers. The company operates across the defense, intelligence, energy, environmental, and space sectors, supporting mission-critical programs involving national security, nuclear operations, aviation, infrastructure, cybersecurity, and engineering. Amentum’s core revenue drivers are long-term government contracts, including cost-plus, fixed-price, and time-and-materials agreements with agencies such as the U.S. Department of Defense, the Department of Energy, NASA, and intelligence community organizations.

The company traces its roots to several legacy government services and engineering businesses, including operations formerly associated with AECOM’s Management Services division and later acquisitions integrated under the Amentum brand. Amentum expanded significantly through acquisitions and contract consolidation in the government services market, positioning itself as a large-scale provider of integrated mission support capabilities. Its strategic positioning is supported by long-duration government relationships, security-cleared workforce capabilities, specialized engineering expertise, and participation in highly regulated and technically complex programs that create operational barriers to entry.