Amentum Holdings, Inc.
Close on Oct 19, 2026
- Market cap
- $4.77B
- P/E (TTM)
- 23.5
- Dividend yield
- –
About Amentum
Services-Business Services, NEC, SIC 7389
Amentum Holdings, Inc. delivers advanced engineering, technology, and mission-critical solutions to government and commercial clients worldwide. Operating through two core reportable divisions—Digital Solutions and Global Engineering Solutions—the enterprise supplies specialized capabilities that encompass cybersecurity, intelligence analytics, space system engineering, next-generation information technology, and comprehensive environmental cleanup and nuclear services. Its primary customer base consists of the United States federal government, notably defense, energy, intelligence, and space exploration agencies. It also serves allied international government organizations alongside commercial entities across the aerospace, automotive, telecommunications, and energy sectors.
The enterprise maintains an international presence with operations spanning all seven continents and a workforce of approximately 50,000 personnel located across more than 70 nations, with approximately one-quarter of its staff positioned outside the United States. The company is incorporated in Delaware, and its corporate headquarters are not identified in the provided text.
Summary of the business section of Amentum's latest annual report, written by StockData.
Company profile
Company
- Legal name
- Amentum Holdings, Inc.
- Founded
- 2024
- Headquarters
- Chantilly, VA
- Address
- 4800 Westfields Boulevard, Suite 400 20151
- Phone
- (703) 579-0410
- Employees
- 50,000, Oct 3, 2025
- Industry
- Services-Business Services, NEC
- Incorporated in
- Delaware
- Fiscal year ends
- October 2
- Auditor
- Ernst & Young LLP, Tysons, Virginia
Stock & identifiers
- Ticker
- AMTM
- Exchange
- NYSE
- IPO date
- Mar 12, 2025
- Shares outstanding
- 245M, Aug 7, 2026
- Public float
- $4.40B, Mar 28, 2025
- Filer category
- Large accelerated filer
- SEC CIK
- 2011286
- CUSIP
- 023939101
- ISIN
- US0239391016
- LEI
- 2549009FJIBLW40CU216
- EIN
- 99-0622272
Executives and directors
Officers and directors who filed ownership reports (Forms 3, 4, 5) in the last two years
| Name | Position | Shares owned |
|---|---|---|
| John E. Heller | Chief Executive Officer, Director | 376,019 |
| Steven J. Demetriou | Executive Chair, Director | 861,218 |
| Stephen A. Arnette | Chief Operating Officer | 106,652 |
| Sean Thomas Mullen | Chief Growth Officer | 35,210 |
| Travis Barton Johnson | Chief Financial Officer | 122,284 |
| Jill L. Bruning | Chief Technology Officer | 197,457 |
| Mary Michele T. St. | Chief Legal Officer & GC | 27,043 |
| Darren Burton | Chief People Officer | 23,600 |
| Stuart Ira Young | Chief Legal Officer | – |
| Christopher M.T. Thompson | Director | 24,812 |
| Vincent K. Brooks | Director | 22,400 |
| Sandra E. Rowland | Director | 20,073 |
| Susan Leslie Ireland | Director | 8,509 |
| John C. Vollmer | Director | 424,780 |
| Ralph E. Eberhart | Director | 43,058 |
| Barbara Loughran | Director | 9,662 |
| Joint Venture GP LLC Amentum | Director | 2,433,022 |
| Joint Venture LP Amentum | Director | 0 |
| Alan E. Goldberg | Director | 45,026,743 |
CEO pay and shareholder return
Pay versus performance table from the proxy statement
| Fiscal year | CEO total pay | CEO pay actually paid | Other executives (avg) | Value of $100 invested | Peer group |
|---|---|---|---|---|---|
| FY2025 Mr.Heller | $21.20M | $30.95M | $4.31M | $101 | $90 |
| FY2024 Mr.Heller | $2.73M | $2.78M | $2.80M | $0 | $0 |
“Actually paid” adjusts reported pay for changes in the value of equity awards. Shareholder return assumes $100 invested at the start of the measurement period, as disclosed by the company.
Employees
Headcount reported in annual reports
“With a workforce of approximately 50,000 people globally, we are also party to labor and employment claims in the normal course of business.”
Corporate history
Events identified from SEC filings
| Date | Event | Details |
|---|---|---|
| Mar 12, 2025 | IPO | Initial public offering priced (424B4 prospectus) |
| Oct 3, 2024 | Acquisition / sale | Completion of acquisition or disposition of assets (8-K Item 2.01) |
| Sep 18, 2024 | Name change | Name changed from Amazon Holdco Inc. to Amentum Holdings, Inc. |
| Jul 15, 2024 | Spin-off | Registration as a new public company (Form 10), e.g. spin-off |