Amentum Inc.
AMTM | NYSE
$19.90
+$0.30 (+1.53%)
At close: Sep 21, 2026, 4:00 PM ET
$19.90
$0 (0.00%)
Pre-market:
Sep 22, 2026, 5:27 AM ET
Company Profile
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.
Key Executives
| Name | Position |
|---|---|
| John E. Heller | Chief Executive Officer & Director |
| Jill Bruning | Chief Technology Officer |
| Luis German | Chief Information Officer |
| Michele Mary | Chief Legal Officer, General Counsel & Corporate Secretary |
| Stephen Arnette | Chief Operating Officer |
| Travis Barton Johnson | Chief Financial Officer |
| Adam Harrison | Senior Vice President of Strategy & Corporate Development |
| Joseph William DeNardi | Senior Vice President & Head of Investor Relations |
| Karina Vollmer | Chief Ethics & Compliance Officer |
| Roela Santos | Chief Marketing & Communications Officer |
| Sean Mullen | Chief Growth Officer |
| Steven J. Demetriou | Executive Chair |
Latest SEC Filings
| Date | Type | Title |
|---|---|---|
| Aug 11, 2026 | 10-Q | Quarterly Report |
| Aug 10, 2026 | 8-K | Current Report |
| Aug 06, 2026 | SC 13G | Statement of acquisition of beneficial ownership b... |
| May 12, 2026 | 10-Q | Quarterly Report |
| May 11, 2026 | 8-K | Current Report |
| May 07, 2026 | 4 | Filing |
| May 07, 2026 | 4 | Filing |
| May 07, 2026 | 4 | Filing |
| May 07, 2026 | 4 | Filing |
| May 07, 2026 | 4 | Filing |
Amentum Inc.
| Country | United States |
| IPO Date | Sep 23, 2024 |
| Industry | Aerospace & Defense |
| Sector | Industrials |
| Employees | 50,000 |
| CEO | John E. Heller |
Contact Details
4800 Westfields Blvd Chantilly,
Virginia 20151 United States
Stock Details
| Ticker Symbol | AMTM |
| Exchange | NYSE |
| Fiscal Year | October - September |
| Reporting Currency | USD |
| CIK Code | 0002011286 |
| CUSIP Number | 023939101 |
| ISIN Number | US0239391016 |
| SIC Code | 7389 |
Recent News
- 21 days ago / businesswire.comAmentum Selected for Projects to Upgrade and Protect the UK Energy Grid
- 25 days ago / defenseworld.netAWH Capital L.P. Invests $4.86 Billion in Amentum Holdings, Inc. $AMTM
- 1 month ago / businesswire.comAmentum Wins $974M Center Maintenance, Operations, and Engineering Contract at NASA Langley Research Center
- 1 month ago / businesswire.comAmentum to Support Critical Infrastructure and Platforms Under New Engineering Services Framework
- 1 month ago / seekingalpha.comAmentum: Everyone, And I Mean (Almost) Everyone, Is Wrong About The Stock
- 1 month ago / businesswire.comNational Security Executive Khalid Syed Joins Amentum
- 1 month ago / seekingalpha.comAmentum Holdings, Inc. (AMTM) Q3 2026 Earnings Call Transcript
- 1 month ago / marketbeat.comAmentum Q3 Earnings Call Highlights
- 1 month ago / zacks.comHere's What Key Metrics Tell Us About Amentum (AMTM) Q3 Earnings
- 1 month ago / zacks.comAmentum Holdings (AMTM) Beats Q3 Earnings Estimates
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