AMTM Amentum Holdings, Inc.
NYSE · SEC CIK 2011286 · EDGAR
- Bought, last 12 months
- $0 0 purchases by 0 insiders
- Sold, last 12 months
- $0 0 sales by 0 insiders
- Filings on record
- 78 since 2024-09-25, latest 2026-09-17 21:35
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| St. Mary Michele T | CLO, GC | — | — |
| Burton Darren | CHRO | — | — |
| Bruning Jill L | CTO | — | — |
| Mullen Sean Thomas | Chief Growth Off | — | — |
| Arnette Stephen A | COO | — | — |
| Brooks Vincent K | Dir | — | — |
| Johnson Travis Barton | CFO | — | — |
| Loughran Barbara | Dir | — | — |
| Vollmer John C. | Dir | — | — |
| IRELAND SUSAN LESLIE | Dir | — | — |
Transactions 83
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| I | 2026-09-17 21:35 | 2026-08-14 | AMTM | Thompson Christopher M.T. | Dir | G - Gift | $0.00 | -4,250 | 5,750 | -42% | $0 |
| D | 2026-05-07 16:32 | 2026-05-06 | AMTM | Heller John E. | CEO, Dir | M - OptEx | — | +18.1K | 384.2K | +5% | — |
| D | 2026-05-07 16:32 | 2026-05-06 | AMTM | Heller John E. | CEO, Dir | F - Tax | $24.89 | -8,184 | 376.0K | -2% | -$203.7K |
| D | 2026-05-07 16:31 | 2026-05-06 | AMTM | Mullen Sean Thomas | Chief Growth Off | M - OptEx | — | +9,072 | 35.2K | +35% | — |
| D | 2026-05-07 16:31 | 2026-05-06 | AMTM | Mullen Sean Thomas | Chief Growth Off | F - Tax | $24.89 | -2,762 | 32.4K | -8% | -$68.7K |
| D | 2026-05-07 16:31 | 2026-05-06 | AMTM | Johnson Travis Barton | CFO | M - OptEx | — | +13.6K | 122.3K | +13% | — |
| D | 2026-05-07 16:31 | 2026-05-06 | AMTM | Johnson Travis Barton | CFO | F - Tax | $24.89 | -4,097 | 118.2K | -3% | -$102.0K |
| D | 2026-05-07 16:30 | 2026-05-06 | AMTM | Bruning Jill L | CTO | M - OptEx | — | +9,072 | 200.2K | +5% | — |
| D | 2026-05-07 16:30 | 2026-05-06 | AMTM | Bruning Jill L | CTO | F - Tax | $24.89 | -2,731 | 197.5K | -1% | -$68.0K |
| D | 2026-05-07 16:29 | 2026-05-06 | AMTM | Arnette Stephen A | COO | M - OptEx | — | +13.6K | 110.0K | +14% | — |
| D | 2026-05-07 16:29 | 2026-05-06 | AMTM | Arnette Stephen A | COO | F - Tax | $24.89 | -3,314 | 106.7K | -3% | -$82.5K |
| 2026-03-05 | 2026-03-04 | AMTM | Bruning Jill L | CTO | G - Gift | $0.00 | -30.0K | 191.0K | -14% | $0 | |
| D | 2026-03-04 | 2026-03-02 | AMTM | Arnette Stephen A | COO | F - Tax | $30.70 | -750 | 96.4K | -0.8% | -$23.0K |
| D | 2026-03-04 | 2026-03-02 | AMTM | Arnette Stephen A | COO | M - OptEx | — | +2,808 | 97.1K | +3% | — |
| D | 2026-02-18 | 2026-02-17 | AMTM | St. Mary Michele T | CLO, GC | M - OptEx | — | +7,080 | 29.4K | +32% | — |
| D | 2026-02-18 | 2026-02-17 | AMTM | St. Mary Michele T | CLO, GC | F - Tax | $30.05 | -2,308 | 27.0K | -8% | -$69.4K |
| D | 2026-02-10 | 2026-02-06 | AMTM | Brooks Vincent K | Dir | A - Grant | $0.00 | +5,062 | 27.5K | +23% | $0 |
| D | 2026-02-10 | 2026-02-06 | AMTM | Brooks Vincent K | Dir | M - OptEx | — | +11.6K | 22.4K | +107% | — |
| D | 2026-02-10 | 2026-02-06 | AMTM | EBERHART RALPH E | Dir | A - Grant | $0.00 | +5,062 | 48.1K | +12% | $0 |
| D | 2026-02-10 | 2026-02-06 | AMTM | EBERHART RALPH E | Dir | M - OptEx | — | +11.6K | 43.1K | +37% | — |
| D | 2026-02-10 | 2026-02-06 | AMTM | Rowland Sandra E. | Dir | M - OptEx | — | +11.6K | 15.0K | +335% | — |
| D | 2026-02-10 | 2026-02-06 | AMTM | Rowland Sandra E. | Dir | A - Grant | $0.00 | +5,062 | 20.1K | +34% | $0 |
| 2026-02-10 | 2026-02-06 | AMTM | IRELAND SUSAN LESLIE | Dir | A - Grant | $0.00 | +5,062 | 8,509 | +147% | $0 | |
| 2026-02-10 | 2026-02-06 | AMTM | Thompson Christopher M.T. | Dir | A - Grant | $0.00 | +5,062 | 5,062 | New | $0 | |
| 2026-02-10 | 2026-02-06 | AMTM | Loughran Barbara | Dir | A - Grant | $0.00 | +5,062 | 9,662 | +110% | $0 | |
| D | 2026-02-10 | 2026-02-06 | AMTM | Vollmer John C. | Dir | A - Grant | $0.00 | +5,062 | 429.8K | +1% | $0 |
| D | 2026-02-10 | 2026-02-06 | AMTM | Vollmer John C. | Dir | M - OptEx | — | +11.6K | 424.8K | +3% | — |
| D | 2026-01-29 | 2026-01-28 | AMTM | Heller John E. | CEO, Dir | M - OptEx | — | +52.0K | 385.8K | +16% | — |
| D | 2026-01-29 | 2026-01-28 | AMTM | Heller John E. | CEO, Dir | F - Tax | $35.71 | -19.8K | 366.1K | -5% | -$705.9K |
| D | 2025-12-19 | 2025-12-17 | AMTM | Mullen Sean Thomas | Chief Growth Off | F - Tax | $28.67 | -4,194 | 26.1K | -14% | -$120.2K |
| D | 2025-12-19 | 2025-12-17 | AMTM | Mullen Sean Thomas | Chief Growth Off | M - OptEx | — | +9,298 | 30.3K | +44% | — |
| D | 2025-12-09 | 2025-12-05 | AMTM | Burton Darren | CHRO | M - OptEx | — | +2,721 | 25.0K | +12% | — |
| D | 2025-12-09 | 2025-12-05 | AMTM | Burton Darren | CHRO | F - Tax | $28.88 | -1,392 | 23.6K | -6% | -$40.2K |
| 2025-11-19 | 2025-11-17 | AMTM | St. Mary Michele T | CLO, GC | A - Grant | $0.00 | +22.3K | 22.3K | New | $0 | |
| D | 2025-11-19 | 2025-11-17 | AMTM | Arnette Stephen A | COO | F - Tax | $21.49 | -287 | 47.0K | -0.6% | -$6,168 |
| D | 2025-11-19 | 2025-11-17 | AMTM | Arnette Stephen A | COO | M - OptEx | — | +1,178 | 47.2K | +3% | — |
| D | 2025-11-19 | 2025-11-17 | AMTM | Arnette Stephen A | COO | A - Grant | $0.00 | +46.8K | 93.7K | +100% | $0 |
| 2025-11-19 | 2025-11-17 | AMTM | Johnson Travis Barton | CFO | A - Grant | $0.00 | +100.2K | 108.7K | +1,185% | $0 | |
| 2025-11-19 | 2025-11-17 | AMTM | Bruning Jill L | CTO | A - Grant | $0.00 | +17.8K | 21.2K | +527% | $0 | |
| 2025-11-19 | 2025-11-17 | AMTM | Mullen Sean Thomas | Chief Growth Off | A - Grant | $0.00 | +17.8K | 21.0K | +554% | $0 | |
| 2025-11-19 | 2025-11-17 | AMTM | Heller John E. | CEO, Dir | A - Grant | $0.00 | +155.9K | 269.4K | +137% | $0 | |
| D | 2025-11-19 | 2025-11-17 | AMTM | DEMETRIOU STEVEN J. | Executive COB, Dir | M - OptEx | — | +43.4K | 726.2K | +6% | — |
| D | 2025-11-19 | 2025-11-17 | AMTM | DEMETRIOU STEVEN J. | Executive COB, Dir | A - Grant | $0.00 | +111.4K | 820.5K | +16% | $0 |
| D | 2025-11-19 | 2025-11-17 | AMTM | DEMETRIOU STEVEN J. | Executive COB, Dir | F - Tax | $21.49 | -17.1K | 709.1K | -2% | -$367.0K |
| 2025-11-19 | 2025-11-17 | AMTM | Burton Darren | CHRO | A - Grant | $0.00 | +22.3K | 22.3K | New | $0 | |
| DM | 2025-11-18 | 2025-11-15+ | AMTM | Arnette Stephen A | COO | F - Tax | $22.07 | -4,651 | 36.0K | -11% | -$102.6K |
| DM | 2025-11-18 | 2025-11-15+ | AMTM | Arnette Stephen A | COO | M - OptEx | — | +19.1K | 41.0K | +87% | — |
| D | 2025-11-10 | 2025-11-06 | AMTM | Heller John E. | CEO, Dir | M - OptEx | — | +39.6K | 131.4K | +43% | — |
| D | 2025-11-10 | 2025-11-06 | AMTM | Heller John E. | CEO, Dir | F - Tax | $21.79 | -17.9K | 113.5K | -14% | -$389.3K |
| D | 2025-11-10 | 2025-11-06 | AMTM | DEMETRIOU STEVEN J. | Executive COB, Dir | F - Tax | $21.79 | -28.8K | 682.8K | -4% | -$627.9K |
| D | 2025-11-10 | 2025-11-06 | AMTM | DEMETRIOU STEVEN J. | Executive COB, Dir | M - OptEx | — | +90.7K | 711.6K | +15% | — |
| D | 2025-11-10 | 2025-11-06 | AMTM | Johnson Travis Barton | CFO | F - Tax | $21.79 | -3,642 | 8,455 | -30% | -$79.4K |
| D | 2025-11-10 | 2025-11-06 | AMTM | Johnson Travis Barton | CFO | M - OptEx | — | +12.1K | 12.1K | New | — |
| D | 2025-11-10 | 2025-11-06 | AMTM | Mullen Sean Thomas | Chief Growth Off | M - OptEx | — | +4,838 | 4,838 | New | — |
| D | 2025-11-10 | 2025-11-06 | AMTM | Mullen Sean Thomas | Chief Growth Off | F - Tax | $21.79 | -1,621 | 3,217 | -34% | -$35.3K |
| D | 2025-11-10 | 2025-11-06 | AMTM | Bruning Jill L | CTO | M - OptEx | — | +4,838 | 4,838 | New | — |
| D | 2025-11-10 | 2025-11-06 | AMTM | Bruning Jill L | CTO | F - Tax | $21.79 | -1,457 | 3,381 | -30% | -$31.7K |
| D | 2025-11-10 | 2025-11-06 | AMTM | Arnette Stephen A | COO | M - OptEx | — | +12.7K | 34.7K | +58% | — |
| D | 2025-11-10 | 2025-11-06 | AMTM | Arnette Stephen A | COO | F - Tax | $21.79 | -3,093 | 31.6K | -9% | -$67.4K |
| I | 2025-05-12 | 2025-05-08 | AMTM | GOLDBERG ALAN E | Dir, 10% | J - Other | — | +1.13M | 45.03M | +3% | — |
| I | 2025-05-12 | 2025-05-08 | AMTM | Amentum Joint Venture LP | Dir | J - Other | $0.00 | -2.43M | 0 | -100% | $0 |
| I | 2025-05-12 | 2025-05-08 | AMTM | Lindsay Goldberg IV L.P. | 10% | J - Other | — | +1.13M | 45.03M | +3% | — |
| I | 2025-05-12 | 2025-05-08 | AMTM | Lindsay Goldberg V L.P. | 10% | J - Other | — | +1.13M | 45.03M | +3% | — |
| I | 2025-04-08 | 2025-04-07 | AMTM | Amentum Joint Venture GP LLC | Dir | A - Grant | $0.00 | +2.43M | 2.43M | New | $0 |
| I | 2025-03-17 | 2025-03-13 | AMTM | JACOBS ENGINEERING GROUP INC /DE/ | 10% | J - Other | — | -19.46M | 0 | -100% | — |
| D | 2025-03-07 | 2025-03-05 | AMTM | EBERHART RALPH E | Dir | M - OptEx | — | +3,447 | 29.9K | +13% | — |
| D | 2025-03-07 | 2024-09-18 | AMTM | EBERHART RALPH E | Dir | J - Other | — | +26.4K | 26.4K | New | — |
| D | 2025-03-07 | 2025-03-05 | AMTM | Vollmer John C. | Dir | M - OptEx | — | +3,447 | 394.8K | +0.9% | — |
| D | 2025-03-07 | 2024-12-17 | AMTM | Vollmer John C. | Dir | J - Other | — | +391.3K | 391.3K | New | — |
| D | 2025-03-07 | 2024-09-18 | AMTM | Brooks Vincent K | Dir | J - Other | — | +6,966 | 6,966 | New | — |
| D | 2025-03-07 | 2025-03-05 | AMTM | Brooks Vincent K | Dir | M - OptEx | — | +3,447 | 10.4K | +49% | — |
| D | 2025-03-07 | 2025-03-05 | AMTM | Rowland Sandra E. | Dir | M - OptEx | — | +3,447 | 3,447 | New | — |
| D | 2025-03-07 | 2025-03-05 | AMTM | IRELAND SUSAN LESLIE | Dir | M - OptEx | — | +3,447 | 3,447 | New | — |
| D | 2025-03-05 | 2024-09-18 | AMTM | Arnette Stephen A | COO | J - Other | — | +20.8K | 20.8K | New | — |
| DM | 2025-03-05 | 2025-03-03+ | AMTM | Arnette Stephen A | COO | M - OptEx | — | +1,751 | 22.2K | +9% | — |
| DM | 2025-03-05 | 2025-03-03+ | AMTM | Arnette Stephen A | COO | F - Tax | $19.37 | -517 | 21.7K | -2% | -$10.0K |
| 2025-02-20 | 2025-02-18 | AMTM | Loughran Barbara | Dir | P - Purchase | $21.23 | +4,600 | 4,600 | New | +$97.7K | |
| 2025-02-14 | 2024-09-18 | AMTM | DEMETRIOU STEVEN J. | Executive COB, Dir | J - Other | — | +520.9K | 520.9K | New | — | |
| 2025-02-14 | 2025-02-12 | AMTM | DEMETRIOU STEVEN J. | Executive COB, Dir | P - Purchase | $20.81 | +100.0K | 620.9K | +19% | +$2.08M | |
| D | 2025-01-30 | 2024-12-17 | AMTM | Heller John E. | CEO, Dir | J - Other | — | +91.8K | 91.8K | New | — |
| I | 2024-12-27 | 2024-12-17 | AMTM | GOLDBERG ALAN E | Dir, 10% | J - Other | — | +43.89M | 43.89M | New | — |
| I | 2024-12-19 | 2024-12-17 | AMTM | Amentum Joint Venture GP LLC | Dir, 10% | J - Other | $0.00 | -90.02M | 0 | -100% | $0 |
| I | 2024-09-25 | 2024-09-23 | AMTM | JACOBS SOLUTIONS INC. | 10% | J - Other | $0.00 | -124.08M | 29.20M | -81% | $0 |
Purchase Sale Sale after option exercise All abbreviations