Amentum Inc. (AMTM)
Company Description
Amentum Holdings, Inc. provides mission-critical, technology-driven services in government and commercial markets.
It operates through two operating segments: Critical Mission Solutions and Cyber & Intelligence.
The Critical Mission Solutions segment provides test, training, and operations services for missile defense systems, IT and engineering services to defense clients and the space sector, technological solutions, including installations, decommissioning, and environmental remediation to energy clients, and other highly technical consulting solutions.
The Cyber & Intelligence segment provides advanced cyber training and data analytics for government professionals, advanced communication systems and aerial mapping technologies to national security clients, and other technical services for United States defense and intelligence clients.
The company was founded on November 26, 2019 and is headquartered in Chantilly, VA.

Country | United States |
IPO Date | Sep 24, 2024 |
Industry | Software - Services |
Sector | Technology |
Employees | 53,000 |
CEO | John E. Heller |
Contact Details
Address: No Address available Chantilly, Delaware United States | |
Website | n/a |
Stock Details
Ticker Symbol | AMTM |
Exchange | NYSE |
Fiscal Year | n/a |
Reporting Currency | USD |
CIK Code | 0002011286 |
CUSIP Number | 023939101 |
ISIN Number | US0239391016 |
Employer ID | 99-0622272 |
SIC Code | 7389 |
Key Executives
Name | Position |
---|---|
John E. Heller | Chief Executive Officer & Director |
Jill Bruning | Chief Technology Officer |
Luis German | Chief Information Officer |
Michele St. Mary | Chief Legal Officer & General Counsel |
Stephen A Arnette | Chief Operating Officer |
Travis Barton Johnson | Chief Accounting Officer & Chief Financial Officer |
Karina Vollmer | Chief Ethics & Compliance Officer |
Nathan Rutledge | Senior Vice President & Head of Investor Relations |
Sean Mullen | Chief Growth Officer |
Steven J. Demetriou | Executive Chair |
Latest SEC Filings
Date | Type | Title |
---|---|---|
Mar 19, 2025 | 4 | Filing |
Mar 17, 2025 | 4 | Filing |
Mar 13, 2025 | SCHEDULE 13G/A | [Amend] Filing |
Mar 12, 2025 | 424B4 | Filing |
Mar 10, 2025 | S-1 | Filing |
Mar 07, 2025 | 8-K | Current Report |
Mar 07, 2025 | 4 | Filing |
Mar 07, 2025 | 4 | Filing |
Mar 07, 2025 | 8-K | Current Report |
Mar 07, 2025 | 4 | Filing |