2026 Top 100
14: AMENTUM
| Top 100 Revenue: | $3,534,544,000 |
| Defense Revenue: | $2,036,412,000 |
| Civilian Revenue: | $1,498,132,000 |
| 2025 Revenue: | $14.4B |
| 2025 Earnings: | $66M |
| 2024 Revenue: | $8.4 billion |
| 2024 Earnings: | $83 million loss |
| Number of employees: | 50,000 |
| Headquarters: | Germantown, Maryland |
| Website: | https://www.amentum.com/ |
| Leadership: | John Heller, CEO; Steve Arnette, COO; Travis Johnson, CFO; Jill Bruning, CTO; Darren Burton, chief people officer; Luis German, CIO; Sean Mullen, chief growth officer; Roela Santos, chief marketing and communications officer; Michele S. Mary, general counsel; Karl Spinneweber, president, mission solutions; Jennifer Walsmith, president, intelligence and cyber; Mark Walter, president, engineering and technology; Mark Whitney, president, entergy and environment; Karina Vollmer, chief ethics and compliance officer; Joseph DeNardi, head of investor relations; Adam Harrison, SVP, strategy and corporate development |
| Ticker: | AMTM |
| Lines of business: | Energy and environment, space, intelligence, defense, civilian, international, commercial |
| Major customers: | Defense, Air Force, Army, Navy, USICE, USCBP, Treasury, NASA |
| Major contracts/projects: | https://www.amentum.com/contracting-vehicles/ |
