As of July 24, 2026, Amentum Holdings's top three insider holders are Alan E Goldberg (Director, 45.03Mn shares), 2014 Llc Goldberg (TenPercentOwner, 45.03Mn shares), Goldberg Employee Co-Inv. Iv L.P. Lindsay (TenPercentOwner, 45.03Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Alan E Goldberg | - | 0 | 45,026,743 | 12 May, 2025 |
| Steven J. Demetriou | Executive Chair | 820,476 | 0 | 19 Nov, 2025 |
| Ralph E Eberhart | - | 48,120 | 0 | 10 Feb, 2026 |
| Christopher M.T. Thompson | - | 5,062 | 0 | 10 Feb, 2026 |
| Sandra E. Rowland | - | 20,073 | 0 | 10 Feb, 2026 |
| Susan Leslie Ireland | - | 8,509 | 0 | 10 Feb, 2026 |
| John C. Vollmer | - | 429,842 | 0 | 10 Feb, 2026 |
| Barbara Loughran | - | 9,662 | 0 | 10 Feb, 2026 |
| Travis Barton Johnson | Chief Financial Officer | 108,675 | 0 | 19 Nov, 2025 |
| Stephen A Arnette | Chief Operating Officer | 96,357 | 0 | 04 Mar, 2026 |
| Sean Thomas Mullen | Chief Growth Officer | 26,138 | 0 | 19 Dec, 2025 |
| Jill L Bruning | Chief Technology Officer | 190,999 | 0 | 05 Mar, 2026 |
| Goldberg Employee Co-Inv. Iv L.P. Lindsay | - | 0 | 45,026,743 | 12 May, 2025 |
| 2014 Llc Goldberg | - | 0 | 45,026,743 | 12 May, 2025 |
| Darren Burton | Chief People Officer | 23,600 | 0 | 09 Dec, 2025 |
| Mary Michele T St. | Chief Legal Officer Gc | 27,043 | 0 | 18 Feb, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 04 Mar, 2026 | Jill L Bruning | Common Stock | D | 30,000 | $0.00 | 190,999 | D | G |
| 04 Mar, 2026 | Jill L Bruning | Common Stock | D | 30,000 | $0.00 | 190,999 | D | G |
| 04 Mar, 2026 | Jill L Bruning | Common Stock | D | 30,000 | $0.00 | 190,999 | D | G |
| 02 Mar, 2026 | Stephen A Arnette | Common Stock | A | 2,808 | - | 97,107 | D | M |
| 02 Mar, 2026 | Stephen A Arnette | Common Stock | D | 750 | $30.70 | 96,357 | D | F |
| 02 Mar, 2026 | Stephen A Arnette | Restricted Stock Units | D | 2,808 | $0.00 | 0 | D | M |
| 17 Feb, 2026 | Mary Michele T St. | Common Stock | A | 7,080 | - | 29,351 | D | M |
| 17 Feb, 2026 | Mary Michele T St. | Common Stock | A | 7,080 | - | 29,351 | D | M |
| 17 Feb, 2026 | Mary Michele T St. | Common Stock | A | 7,080 | - | 29,351 | D | M |
| 17 Feb, 2026 | Mary Michele T St. | Common Stock | D | 2,308 | $30.05 | 27,043 | D | F |
| 17 Feb, 2026 | Mary Michele T St. | Common Stock | D | 2,308 | $30.05 | 27,043 | D | F |
| 17 Feb, 2026 | Mary Michele T St. | Common Stock | D | 2,308 | $30.05 | 27,043 | D | F |
| 17 Feb, 2026 | Mary Michele T St. | Restricted Stock Units | D | 7,080 | $0.00 | 14,162 | D | M |
| 17 Feb, 2026 | Mary Michele T St. | Restricted Stock Units | D | 7,080 | $0.00 | 14,162 | D | M |
| 17 Feb, 2026 | Mary Michele T St. | Restricted Stock Units | D | 7,080 | $0.00 | 14,162 | D | M |
| 06 Feb, 2026 | Susan Leslie Ireland | Common Stock | A | 5,062 | $0.00 | 8,509 | D | A |
| 06 Feb, 2026 | Susan Leslie Ireland | Common Stock | A | 5,062 | $0.00 | 8,509 | D | A |
| 06 Feb, 2026 | John C. Vollmer | Common Stock | A | 11,564 | - | 424,780 | D | M |
| 06 Feb, 2026 | Barbara Loughran | Common Stock | A | 5,062 | $0.00 | 9,662 | D | A |
| 06 Feb, 2026 | Christopher M.T. Thompson | Common Stock | A | 5,062 | $0.00 | 5,062 | D | A |