Amentum Holdings, Inc. (AMTM)
Data as of , from SEC Form 4 filings.
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About Amentum Holdings, Inc. (AMTM)
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.
- CHANTILLY, VA
- 50,000
- 2024
- XNYS
AMTM Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Bona-fide gift | 1 | 4,250 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
AMTM insider transactions (Form 4)
7654 Form 4 filings on record, the earliest from Oct 4, 2024, newest first. Filing history page 1 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Christopher M.T. Thompson - Director | Gift | Common Stock | 4,250 | $0.00 | - | |
| John E. Heller - Officer | Option exercise | Common Stock | 18,145 | - footnote F1 | - | |
| John E. Heller - Officer | Tax withholding / forfeiture | Common Stock | 8,184 footnote F2 | $24.89 | $204K | |
| John E. Heller - Officer | Option exercise | Restricted Stock Units | 18,145 | $0.00 | - | |
| ||||||
| Sean Thomas Mullen - Officer | Option exercise | Common Stock | 9,072 | - footnote F1 | - | |
| Sean Thomas Mullen - Officer | Tax withholding / forfeiture | Common Stock | 2,762 footnote F2 | $24.89 | $69K | |
| Sean Thomas Mullen - Officer | Option exercise | Restricted Stock Units | 9,072 | $0.00 | - | |
| ||||||
| Travis Barton Johnson - Officer | Option exercise | Common Stock | 13,609 | - footnote F1 | - | |
| Travis Barton Johnson - Officer | Option exercise | Restricted Stock Units | 13,609 | $0.00 | - | |
| Travis Barton Johnson - Officer | Tax withholding / forfeiture | Common Stock | 4,097 footnote F2 | $24.89 | $102K | |
| ||||||
| Jill L. Bruning - Officer | Option exercise | Common Stock | 9,072 | - footnote F1 | - | |
| Jill L. Bruning - Officer | Tax withholding / forfeiture | Common Stock | 2,731 footnote F3 | $24.89 | $68K | |
| Jill L. Bruning - Officer | Option exercise | Restricted Stock Units | 9,072 | $0.00 | - | |
| ||||||
| Stephen A. Arnette - Officer | Option exercise | Common Stock | 13,609 | - footnote F1 | - | |
| Stephen A. Arnette - Officer | Tax withholding / forfeiture | Common Stock | 3,314 footnote F2 | $24.89 | $82K | |
| Stephen A. Arnette - Officer | Option exercise | Restricted Stock Units | 13,609 | $0.00 | - | |
| ||||||
| Jill L. Bruning - Officer | Gift | Common Stock | 30,000 | $0.00 | - | |
| Stephen A. Arnette - Officer | Option exercise | Restricted Stock Units | 2,808 | $0.00 | - | |
| Stephen A. Arnette - Officer | Option exercise | Common Stock | 2,808 | - footnote F1 | - | |
| Stephen A. Arnette - Officer | Tax withholding / forfeiture | Common Stock | 750 footnote F2 | $30.70 | $23K | |
| ||||||
| Mary Michele T. St. - Officer | Option exercise | Common Stock | 7,080 | - footnote F1 | - | |
| Mary Michele T. St. - Officer | Tax withholding / forfeiture | Common Stock | 2,308 footnote F2 | $30.05 | $69K | |
| Mary Michele T. St. - Officer | Option exercise | Restricted Stock Units | 7,080 | $0.00 | - | |
| ||||||
| Susan Leslie Ireland - Director | Grant or award | Common Stock | 5,062 footnote F1 | $0.00 | - | |
| ||||||
| Sandra E. Rowland - Director | Option exercise | Common Stock | 11,564 | - footnote F1 | - | |
| Sandra E. Rowland - Director | Grant or award | Common Stock | 5,062 footnote F2 | $0.00 | - | |
| Sandra E. Rowland - Director | Option exercise | Restricted Stock Units | 11,564 | $0.00 | - | |
| ||||||
| Vincent K. Brooks - Director | Option exercise | Common Stock | 11,564 | - footnote F1 | - | |
| Vincent K. Brooks - Director | Grant or award | Common Stock | 5,062 footnote F3 | $0.00 | - | |
| Vincent K. Brooks - Director | Option exercise | Restricted Stock Units | 11,564 | $0.00 | - | |
| ||||||
 Ralph E. Eberhart - Director | Option exercise | Common Stock | 11,564 | - footnote F1 | - | |
| Ralph E. Eberhart - Director | Grant or award | Common Stock | 5,062 footnote F3 | $0.00 | - | |
| Ralph E. Eberhart - Director | Option exercise | Restricted Stock Units | 11,564 | $0.00 | - | |
| ||||||
| Barbara Loughran - Director | Grant or award | Common Stock | 5,062 footnote F1 | $0.00 | - | |
| ||||||
| Christopher M.T. Thompson - Director | Grant or award | Common Stock | 5,062 footnote F1 | $0.00 | - | |
| ||||||
| John C. Vollmer - Director | Option exercise | Common Stock | 11,564 | - footnote F1 | - | |
| John C. Vollmer - Director | Grant or award | Common Stock | 5,062 footnote F3 | $0.00 | - | |
| John C. Vollmer - Director | Option exercise | Restricted Stock Units | 11,564 | $0.00 | - | |
| ||||||
| John E. Heller - Officer | Option exercise | Common Stock | 51,979 | - footnote F1 | - | |
| John E. Heller - Officer | Tax withholding / forfeiture | Common Stock | 19,768 footnote F2 | $35.71 | $706K | |
| John E. Heller - Officer | Option exercise | Restricted Stock Units | 51,979 | $0.00 | - | |
| ||||||
| Sean Thomas Mullen - Officer | Grant or award | Common Stock | 17,817 footnote F1 | $0.00 | - | |
| ||||||
| Jill L. Bruning - Officer | Grant or award | Common Stock | 17,817 footnote F1 | $0.00 | - | |
| ||||||
| Darren Burton - Officer | Grant or award | Common Stock | 22,271 footnote F1 | $0.00 | - | |
| ||||||
| Mary Michele T. St. - Officer | Grant or award | Common Stock | 22,271 footnote F1 | $0.00 | - | |
| ||||||
| Stephen A. Arnette - Officer | Option exercise | Restricted Stock Units | 1,178 | $0.00 | - | |
| Stephen A. Arnette - Officer | Option exercise | Common Stock | 1,178 | - footnote F1 | - | |
| Stephen A. Arnette - Officer | Tax withholding / forfeiture | Common Stock | 287 footnote F2 | $21.49 | $6K | |
| Stephen A. Arnette - Officer | Grant or award | Common Stock | 46,769 footnote F3 | $0.00 | - | |
| ||||||
| Travis Barton Johnson - Officer | Grant or award | Common Stock | 100,220 footnote F1 | $0.00 | - | |
| ||||||
| John E. Heller - Officer | Grant or award | Common Stock | 155,897 footnote F1 | $0.00 | - | |
| ||||||
 Steven J. Demetriou - Officer | Option exercise | Restricted Stock Units | 43,396 | $0.00 | - | |
| Steven J. Demetriou - Officer | Option exercise | Common Stock | 43,396 | - footnote F1 | - | |
| Steven J. Demetriou - Officer | Tax withholding / forfeiture | Common Stock | 17,077 footnote F2 | $21.49 | $367K | |
| Steven J. Demetriou - Officer | Grant or award | Common Stock | 111,355 footnote F3 | $0.00 | - | |
| ||||||
| Stephen A. Arnette - Officer | Tax withholding / forfeiture | Common Stock | 1,403 footnote F2 | $22.07 | $31K | |
| Stephen A. Arnette - Officer | Option exercise | Common Stock | 5,053 | - footnote F1 | - | |
| Stephen A. Arnette - Officer | Tax withholding / forfeiture | Common Stock | 1,231 footnote F2 | $22.07 | $27K | |
| Stephen A. Arnette - Officer | Option exercise | Common Stock | 3,681 | - footnote F1 | - | |
| Stephen A. Arnette - Officer | Tax withholding / forfeiture | Common Stock | 897 footnote F2 | $22.07 | $20K | |
| Stephen A. Arnette - Officer | Option exercise | Common Stock | 4,596 | - footnote F1 | - | |
| Stephen A. Arnette - Officer | Tax withholding / forfeiture | Common Stock | 1,120 footnote F2 | $22.07 | $25K | |
| Stephen A. Arnette - Officer | Option exercise | Restricted Stock Units | 5,758 | $0.00 | - | |
| Stephen A. Arnette - Officer | Option exercise | Restricted Stock Units | 5,053 | $0.00 | - | |
| Stephen A. Arnette - Officer | Option exercise | Restricted Stock Units | 3,681 | $0.00 | - | |
| Stephen A. Arnette - Officer | Option exercise | Restricted Stock Units | 4,596 | $0.00 | - | |
| Stephen A. Arnette - Officer | Option exercise | Common Stock | 5,758 | - footnote F1 | - | |
| ||||||
| Jill L. Bruning - Officer | Option exercise | Restricted Stock Units | 4,838 | $0.00 | - | |
| Jill L. Bruning - Officer | Option exercise | Common Stock | 4,838 | - footnote F1 | - | |
| Jill L. Bruning - Officer | Tax withholding / forfeiture | Common Stock | 1,457 footnote F2 | $21.79 | $32K | |
| ||||||
| Sean Thomas Mullen - Officer | Option exercise | Common Stock | 4,838 | - footnote F1 | - | |
| Sean Thomas Mullen - Officer | Tax withholding / forfeiture | Common Stock | 1,621 footnote F2 | $21.79 | $35K | |
| Sean Thomas Mullen - Officer | Option exercise | Restricted Stock Units | 4,838 | $0.00 | - | |
| ||||||
| Stephen A. Arnette - Officer | Option exercise | Restricted Stock Units | 12,701 | $0.00 | - | |
| Stephen A. Arnette - Officer | Option exercise | Common Stock | 12,701 | - footnote F1 | - | |
| Stephen A. Arnette - Officer | Tax withholding / forfeiture | Common Stock | 3,093 footnote F2 | $21.79 | $67K | |
| ||||||
Item 5.02, 9.01
Item 2.02, 9.01
Item 2.02, 9.01
Item 1.01
AMTM insider trading FAQ
What is the latest insider trade for AMTM?
Amentum Holdings, Inc. (AMTM) had 1 insider filing in the last 90 days, with the most recent on 2026-09-18. The full record for AMTM runs to 54 Form 4 filings, the earliest from 2024-10-04. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying AMTM stock?
No insider purchases of AMTM were filed in the last 90 days.
How many insiders are selling AMTM stock?
No insider sales of AMTM were filed in the last 90 days.
Where can I see AMTM SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects AMTM Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Christopher M.T. Thompson view on EDGAR
- - John E. Heller view on EDGAR
- - Sean Thomas Mullen view on EDGAR
- - Travis Barton Johnson view on EDGAR
- - Jill L. Bruning view on EDGAR
- - Stephen A. Arnette view on EDGAR
- - Jill L. Bruning view on EDGAR
- - Stephen A. Arnette view on EDGAR
- - Mary Michele T. St. view on EDGAR
Related companies with recent insider activity
Learn more
- What the Form 4 transaction codes mean
- Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
- Insider activity in Information Technology
- Where AMTM's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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