Companies / Amentum Holdings, Inc. / Activity
Activity — Amentum Holdings, Inc.
25 moves.
| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Jan 28, 2026 | Heller John E. CEO | Other | Common Stock | $705.9K | -20K -5.12% | 366,058 0.15% of shares | low |
| Feb 17, 2026 | St. Mary Michele T Executive | Other | Common Stock | $69.4K | -2K -7.86% | 27,043 0.01% of shares | low |
| Mar 2, 2026 | Arnette Stephen A Executive | Other | Common Stock | $23.0K | -750 -0.77% | 96,357 0.04% of shares | low |
| Mar 4, 2026 | Bruning Jill L Executive | Gift | Common Stock | $0 | -30K -13.57% | 190,999 0.08% of shares | low |
| Feb 6, 2026 | Brooks Vincent K Director | Grant | Common Stock | $0 | +5K +22.60% | 27,462 0.01% of shares | low |
| Feb 6, 2026 | Loughran Barbara Director | Grant | Common Stock | $0 | +5K +110.04% | 9,662 <0.01% of shares | low |
| Feb 6, 2026 | Vollmer John C. Director | Grant | Common Stock | $0 | +5K +1.19% | 429,842 0.18% of shares | low |
| Feb 6, 2026 | Ireland Susan Leslie Director | Grant | Common Stock | $0 | +5K +146.85% | 8,509 <0.01% of shares | low |
| Feb 6, 2026 | Rowland Sandra E. Director | Grant | Common Stock | $0 | +5K +33.72% | 20,073 <0.01% of shares | low |
| Feb 6, 2026 | Thompson Christopher M.T. Director | Grant | Common Stock | $0 | +5K | 5,062 <0.01% of shares | low |
| Feb 6, 2026 | Eberhart Ralph E Director | Grant | Common Stock | $0 | +5K +11.76% | 48,120 0.02% of shares | low |
| Feb 17, 2026 | St. Mary Michele T Executive | Exercise | Restricted Stock Units | — | -7K -33.33% | 14,162 <0.01% of shares | low |
| Feb 17, 2026 | St. Mary Michele T Executive | Exercise | Common Stock | — | +7K +31.79% | 29,351 0.01% of shares | low |
| Mar 2, 2026 | Arnette Stephen A Executive | Exercise | Restricted Stock Units | — | -3K -100.00% | 0 0.00% of shares | low |
| Mar 2, 2026 | Arnette Stephen A Executive | Exercise | Common Stock | — | +3K +2.98% | 97,107 0.04% of shares | low |
| Feb 6, 2026 | Brooks Vincent K Director | Exercise | Restricted Stock Units | — | -12K -100.00% | 0 0.00% of shares | low |
| Feb 6, 2026 | Brooks Vincent K Director | Exercise | Common Stock | — | +12K +106.72% | 22,400 <0.01% of shares | low |
| Feb 6, 2026 | Vollmer John C. Director | Exercise | Restricted Stock Units | — | -12K -100.00% | 0 0.00% of shares | low |
| Feb 6, 2026 | Vollmer John C. Director | Exercise | Common Stock | — | +12K +2.80% | 424,780 0.17% of shares | low |
| Feb 6, 2026 | Rowland Sandra E. Director | Exercise | Restricted Stock Units | — | -12K -100.00% | 0 0.00% of shares | low |
| Feb 6, 2026 | Rowland Sandra E. Director | Exercise | Common Stock | — | +12K +335.48% | 15,011 <0.01% of shares | low |
| Jan 28, 2026 | Heller John E. CEO | Exercise | Restricted Stock Units | — | -52K -33.33% | 103,959 0.04% of shares | low |
| Jan 28, 2026 | Heller John E. CEO | Exercise | Common Stock | — | +52K +15.57% | 385,826 0.16% of shares | low |
| Feb 6, 2026 | Eberhart Ralph E Director | Exercise | Restricted Stock Units | — | -12K -100.00% | 0 0.00% of shares | low |
| Feb 6, 2026 | Eberhart Ralph E Director | Exercise | Common Stock | — | +12K +36.72% | 43,058 0.02% of shares | low |