Amentum Holdings, Inc. (AMTM)
$20.24-$0.12 (-0.59%) Today
Amentum Holdings Inc is an engineering and technology solutions provider serving U.S. and allied government agencies, as well as international and commercial customers across energy and environmental, intelligence, space, defense, civilian and commercial markets. It provides environmental remediation, intelligence and counter-threat solutions, data analytics, engineering and integration, testing, training and citizen services. The company operates through two segments: Digital Solutions, offering digital and data-driven services, and Global Engineering Solutions, providing environmental remediation, nuclear power solutions, platform engineering, sustainment, and supply chain management. majority of its revenue comes from the Global Engineering Solutions segment and from the United States.
No Form 4 activity for AMTM in the last 90 days.
53 Form 4 filings on record, the earliest from Oct 4, 2024, newest first. Filing history page 2 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Stephen A. Arnette - Officer | Option exercise | Restricted Stock Units | 12,701 | $0.00 | - | |
| Stephen A. Arnette - Officer | Option exercise | Common Stock | 12,701 | - | - | |
| Stephen A. Arnette - Officer | Tax withholding / forfeiture | Common Stock | 3,093 | $21.79 | $67K | |
| Sean Thomas Mullen - Officer | Option exercise | Common Stock | 4,838 | - | - | |
| Sean Thomas Mullen - Officer | Tax withholding / forfeiture | Common Stock | 1,621 | $21.79 | $35K | |
| Sean Thomas Mullen - Officer | Option exercise | Restricted Stock Units | 4,838 | $0.00 | - | |
| Alan E. Goldberg - Director | Other | Common Stock | 1,132,839 | - | - | |
| Alan E. Goldberg - Director | Other | Common Stock | 43,893,904 | - | - | |
| Sean Thomas Mullen - Officer | Grant or award | Restricted Stock Units | 9,298 | $0.00 | - | |
| Amentum Joint Venture GP LLC | Other | Common Stock | 90,021,804 | $0.00 | - | |
| Darren Burton - Officer | Grant or award | Restricted Stock Units | 8,165 | $0.00 | - | |
| Barbara Loughran - Director | Grant or award | Restricted Stock Units | 3,447 | $0.00 | - | |
| John C. Vollmer - Director | Grant or award | Restricted Stock Units | 3,447 | $0.00 | - | |
| Sandra E. Rowland - Director | Grant or award | Restricted Stock Units | 3,447 | $0.00 | - | |
| Vincent K. Brooks - Director | Grant or award | Restricted Stock Units | 3,447 | $0.00 | - | |
 Ralph E. Eberhart - Director | Grant or award | Restricted Stock Units | 3,447 | $0.00 | - | |
| Travis Barton Johnson - Officer | Grant or award | Restricted Stock Units | 27,218 | $0.00 | - | |
| Travis Barton Johnson - Officer | Grant or award | Restricted Stock Units | 36,291 | $0.00 | - | |
| Susan Leslie Ireland - Director | Grant or award | Restricted Stock Units | 3,447 | $0.00 | - | |
| Stuart Ira Young - Officer | Grant or award | Restricted Stock Units | 3,629 | $0.00 | - | |
| Jill L. Bruning - Officer | Grant or award | Restricted Stock Units | 18,145 | $0.00 | - | |
| Jill L. Bruning - Officer | Grant or award | Restricted Stock Units | 14,516 | $0.00 | - | |
| Sean Thomas Mullen - Officer | Grant or award | Restricted Stock Units | 18,145 | $0.00 | - | |
| Sean Thomas Mullen - Officer | Grant or award | Restricted Stock Units | 14,516 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 27,218 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 38,105 | $0.00 | - | |
| John E. Heller - Officer | Grant or award | Restricted Stock Units | 36,291 | $0.00 | - | |
| John E. Heller - Officer | Grant or award | Restricted Stock Units | 118,853 | $0.00 | - | |
 Steven J. Demetriou - Officer | Grant or award | Restricted Stock Units | 90,727 | $0.00 | - | |
| Christopher M.T. Thompson - Director | Grant or award | Restricted Stock Units | 3,447 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 521 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 1,178 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 4,038 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 10,106 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 17,273 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 3,681 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 4,596 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 10,984 | $0.00 | - | |
| Stephen A. Arnette - Officer | Grant or award | Restricted Stock Units | 10,395 | $0.00 | - | |
| Steven J. Demetriou - Officer | Grant or award | Restricted Stock Units | 43,396 | $0.00 | - |
This is as far as the anonymous view goes. Create a free account for all 53 AMTM filings on record.
Amentum Holdings, Inc. (AMTM) has filed no insider reports in the last 90 days. The most recent on record is dated 2026-05-07. The full record for AMTM runs to 53 Form 4 filings, the earliest from 2024-10-04. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
No insider purchases of AMTM were filed in the last 90 days.
No insider sales of AMTM were filed in the last 90 days.
This page tracks AMTM Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
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