Amentum Holdings, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Mullen Sean Thomas | Chief Growth Officer | Option Exercise | 9,298 | — | — | 30,332 | Dec 17, 2025 |
| Burton Darren | Chief People Officer | Tax Withholding | 1,392 | $28.88 | $40,201 | 23,600 | Dec 5, 2025 |
| Mullen Sean Thomas | Chief Growth Officer | Award / Grant | 17,817 | — | — | 21,034 | Nov 17, 2025 |
| Heller John E. | Chief Executive Officer | Award / Grant | 155,897 | — | — | 269,440 | Nov 17, 2025 |
| Bruning Jill L | Chief Technology Officer | Award / Grant | 17,817 | — | — | 21,198 | Nov 17, 2025 |
| Burton Darren | Chief People Officer | Award / Grant | 22,271 | — | — | 22,271 | Nov 17, 2025 |
| Johnson Travis Barton | Chief Financial Officer | Award / Grant | 100,220 | — | — | 108,675 | Nov 17, 2025 |
| St. Mary Michele T | Chief Legal Officer & GC | Award / Grant | 22,271 | — | — | 22,271 | Nov 17, 2025 |
| Arnette Stephen A | Chief Operating Officer | Award / Grant | 46,769 | — | — | 93,725 | Nov 17, 2025 |
| DEMETRIOU STEVEN J. | Executive Chair | Tax Withholding | 17,077 | $21.49 | $366,985 | 709,121 | Nov 17, 2025 |
| Arnette Stephen A | Chief Operating Officer | Option Exercise | 5,053 | — | — | 41,036 | Nov 16, 2025 |
| Johnson Travis Barton | Chief Financial Officer | Option Exercise | 12,097 | — | — | 12,097 | Nov 6, 2025 |
| Bruning Jill L | Chief Technology Officer | Tax Withholding | 1,457 | $21.79 | $31,748 | 3,381 | Nov 6, 2025 |
| Heller John E. | Chief Executive Officer | Tax Withholding | 17,868 | $21.79 | $389,344 | 113,543 | Nov 6, 2025 |
| Mullen Sean Thomas | Chief Growth Officer | Tax Withholding | 1,621 | $21.79 | $35,322 | 3,217 | Nov 6, 2025 |
| DEMETRIOU STEVEN J. | Executive Chair | Option Exercise | 90,727 | — | — | 711,620 | Nov 6, 2025 |
| Arnette Stephen A | Chief Operating Officer | Tax Withholding | 3,093 | $21.79 | $67,396 | 31,628 | Nov 6, 2025 |
| Lindsay Goldberg V L.P. | — | Other | 1,132,839 | — | — | 45,026,743 | May 8, 2025 |
| GOLDBERG ALAN E | — | Other | 1,132,839 | — | — | 45,026,743 | May 8, 2025 |
| Lindsay Goldberg IV L.P. | — | Other | 1,132,839 | — | — | 45,026,743 | May 8, 2025 |
| Amentum Joint Venture LP | — | Other | 2,433,022 | — | — | — | May 8, 2025 |
| Amentum Joint Venture GP LLC | — | Award / Grant | 2,433,022 | — | — | 2,433,022 | Apr 7, 2025 |
| JACOBS ENGINEERING GROUP INC /DE/ | — | Other | 19,464,174 | — | — | — | Mar 13, 2025 |
| IRELAND SUSAN LESLIE | — | Option Exercise | 3,447 | — | — | 3,447 | Mar 5, 2025 |
| Vollmer John C. | — | Other | 391,341 | — | — | 391,341 | Mar 5, 2025 |
| Rowland Sandra E. | — | Option Exercise | 3,447 | — | — | 3,447 | Mar 5, 2025 |
| EBERHART RALPH E | — | Other | 26,439 | — | — | 26,439 | Mar 5, 2025 |
| Loughran Barbara | — | Purchase | 4,600 | $21.23 | $97,658 | 4,600 | Feb 18, 2025 |
| Amentum Joint Venture GP LLC | — | Other | 90,021,804 | — | — | — | Dec 17, 2024 |
| GOLDBERG ALAN E | — | Other | 43,893,904 | — | — | 43,893,904 | Dec 17, 2024 |
| Heller John E. | Chief Executive Officer | Other | 91,794 | — | — | 91,794 | Dec 17, 2024 |
| JACOBS SOLUTIONS INC. | — | Other | 124,084,108 | — | — | 29,196,261 | Sep 23, 2024 |
| Brooks Vincent K | — | Option Exercise | 3,447 | — | — | 10,413 | Sep 18, 2024 |
| Arnette Stephen A | Chief Operating Officer | Tax Withholding | 365 | $19.64 | $7,169 | 21,651 | Sep 18, 2024 |
| DEMETRIOU STEVEN J. | Executive Chair | Purchase | 100,000 | $20.81 | $2,081,000 | 620,893 | Sep 18, 2024 |