Amentum Holdings, Inc. (AMTM)
NYSE: AMTM · Real-Time Price · USD
28.88
-0.37 (-1.26%)
At close: Dec 5, 2025, 4:00 PM EST
29.00
+0.12 (0.42%)
After-hours: Dec 5, 2025, 7:55 PM EST
Company Description
Amentum Holdings, Inc. engages in the provision of engineering and technology solutions in the United States and internationally.
It operates through two segments, Digital Solutions and Global Engineering Solutions. The company offers digital and data-driven solutions, including intelligence analytics, space system development, cybersecurity, and IT to the federal government and commercial clients.
It also provides large-scale environmental remediation, nuclear power solutions, platform engineering, sustainment, and supply chain management for the U.S. government and allied nations.
The company was incorporated in 2023 and is headquartered in Chantilly, Virginia.
Amentum Holdings, Inc.
| Country | United States |
| Founded | 2020 |
| Industry | Specialty Business Services |
| Sector | Industrials |
| Employees | 50,000 |
| CEO | John Heller |
Contact Details
Address: 4800 Westfields Blvd, Suite #400 Chantilly, Virginia 20151 United States | |
| Phone | 703 579 0410 |
| Website | amentum.com |
Stock Details
| Ticker Symbol | AMTM |
| Exchange | NYSE |
| Stock Type | Common Stock |
| Fiscal Year | November - October |
| Reporting Currency | USD |
| CIK Code | 2011286 |
| CUSIP Number | 023939101 |
| ISIN Number | US0239391016 |
| Employer ID | 99-0622272 |
| SIC Code | 7389 |
Key Executives
| Name | Position |
|---|---|
| John E. Heller | Chief Executive Officer and Director |
| Steven J. Demetriou | Executive Chair |
| Stephen A Arnette | Chief Operating Officer |
| Sean Mullen | Chief Growth Officer |
| Jill Bruning | Chief Technology Officer |
| Luis German | Chief Information Officer |
| Nathan Rutledge | Senior Vice President and Head of Investor Relations |
| Karina Vollmer | Chief Ethics and Compliance Officer |
| Michele St. Mary | Chief Legal Officer and General Counsel |
| Roela Santos | Chief Marketing and Communications Officer |
Latest SEC Filings
| Date | Type | Title |
|---|---|---|
| Nov 25, 2025 | 10-K | Annual Report |
| Nov 24, 2025 | 8-K | Current Report |
| Nov 6, 2025 | SCHEDULE 13G/A | Filing |
| Oct 1, 2025 | S-3ASR | Automatic shelf registration statement of securities of well-known seasoned issuers |
| Aug 6, 2025 | 10-Q | Quarterly Report |
| Aug 5, 2025 | 8-K | Current Report |
| May 9, 2025 | SCHEDULE 13G/A | Filing |
| May 7, 2025 | 10-Q | Quarterly Report |
| May 6, 2025 | 8-K | Current Report |
| Mar 13, 2025 | SCHEDULE 13G/A | Filing |