AMTM · Amentum Holdings Inc. Common Stock
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| Lindsay Goldberg Employee Co-Inv. IV L.P. 10% Owner | ▼ Sell | Other | 45,026,743 Shares held | 5/8/2025 | View profile |
| Alan E. Goldberg Director | ▼ Sell | Other | 45,026,743 Shares held | 5/8/2025 | View profile |
| Goldberg 2014 LLC 10% Owner | ▼ Sell | Other | 45,026,743 Shares held | 5/8/2025 | View profile |
| Steven J. Demetriou CHAIR AND CEO | ▲ Buy | Grant | 820,476 Shares held | 11/17/2025 | View profile |
| John C. Vollmer Director | ▲ Buy | Grant | 429,842 Shares held | 2/6/2026 | View profile |
| John E. Heller Chief Executive Officer | ▼ Sell | Tax Withholding | 376,019 Shares held | 5/6/2026 | View profile |
| Jill L. Bruning Chief Technology Officer | ▼ Sell | Tax Withholding | 197,457 Shares held | 5/6/2026 | View profile |
| Travis Barton Johnson SVP, Corp. Controller & CAO | ▼ Sell | Tax Withholding | 118,187 Shares held | 5/6/2026 | View profile |
| Stephen A. Arnette Executive Vice President | ▼ Sell | Tax Withholding | 106,652 Shares held | 5/6/2026 | View profile |
| Ralph E. Eberhart Director | ▲ Buy | Grant | 48,120 Shares held | 2/6/2026 | View profile |
| Sean Thomas Mullen Chief Growth Officer | ▼ Sell | Tax Withholding | 32,448 Shares held | 5/6/2026 | View profile |
| Vincent K. Brooks Director | ▲ Buy | Grant | 27,462 Shares held | 2/6/2026 | View profile |
| Mary Michele T. St. Chief Legal Officer & GC | ▼ Sell | Tax Withholding | 27,043 Shares held | 2/17/2026 | View profile |
| Darren Burton Chief People Officer | ▼ Sell | Tax Withholding | 23,600 Shares held | 12/5/2025 | View profile |
| Sandra E. Rowland Director | ▲ Buy | Grant | 20,073 Shares held | 2/6/2026 | View profile |
| Barbara Loughran Director | ▲ Buy | Grant | 9,662 Shares held | 2/6/2026 | View profile |
| Susan Leslie Ireland Director | ▲ Buy | Grant | 8,509 Shares held | 2/6/2026 | View profile |
| Christopher M.T. Thompson Director | ▼ Sell | Gift | 5,750 Shares held | 8/14/2026 | View profile |
| Amentum Joint Venture GP LLC | ▼ Sell | Other | 0 Shares held | 5/8/2025 | View profile |
| JACOBS SOLUTIONS INC. | ▼ Sell | Other | 0 Shares held | 3/13/2025 | View profile |
Transaction History
| Christopher M.T. Thompson | ▼ Sell | Gift | 4,250 | $0 | 8/14/2026 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 13,609 | — | 5/6/2026 |
| John E. Heller | ▲ Buy | Option Exercise | 18,145 | — | 5/6/2026 |
| John E. Heller | ▼ Sell | Tax Withholding | 8,184 | $204K | 5/6/2026 |
| Sean Thomas Mullen | ▲ Buy | Option Exercise | 9,072 | — | 5/6/2026 |
| Sean Thomas Mullen | ▼ Sell | Tax Withholding | 2,762 | $69K | 5/6/2026 |
| Travis Barton Johnson | ▲ Buy | Option Exercise | 13,609 | — | 5/6/2026 |
| Travis Barton Johnson | ▼ Sell | Tax Withholding | 4,097 | $102K | 5/6/2026 |
| Jill L. Bruning | ▲ Buy | Option Exercise | 9,072 | — | 5/6/2026 |
| Jill L. Bruning | ▼ Sell | Tax Withholding | 2,731 | $68K | 5/6/2026 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 3,314 | $82K | 5/6/2026 |
| Jill L. Bruning | ▼ Sell | Gift | 30,000 | $0 | 3/4/2026 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 2,808 | — | 3/2/2026 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 750 | $23K | 3/2/2026 |
| Mary Michele T. St. | ▲ Buy | Option Exercise | 7,080 | — | 2/17/2026 |
| Mary Michele T. St. | ▼ Sell | Tax Withholding | 2,308 | $69K | 2/17/2026 |
| Susan Leslie Ireland | ▲ Buy | Grant | 5,062 | $0 | 2/6/2026 |
| Sandra E. Rowland | ▲ Buy | Option Exercise | 11,564 | — | 2/6/2026 |
| Sandra E. Rowland | ▲ Buy | Grant | 5,062 | $0 | 2/6/2026 |
| Vincent K. Brooks | ▲ Buy | Option Exercise | 11,564 | — | 2/6/2026 |
| Vincent K. Brooks | ▲ Buy | Grant | 5,062 | $0 | 2/6/2026 |
| Ralph E. Eberhart | ▲ Buy | Option Exercise | 11,564 | — | 2/6/2026 |
| Ralph E. Eberhart | ▲ Buy | Grant | 5,062 | $0 | 2/6/2026 |
| Barbara Loughran | ▲ Buy | Grant | 5,062 | $0 | 2/6/2026 |
| Christopher M.T. Thompson | ▲ Buy | Grant | 5,062 | $0 | 2/6/2026 |
| John C. Vollmer | ▲ Buy | Option Exercise | 11,564 | — | 2/6/2026 |
| John C. Vollmer | ▲ Buy | Grant | 5,062 | $0 | 2/6/2026 |
| John E. Heller | ▲ Buy | Option Exercise | 51,979 | — | 1/28/2026 |
| John E. Heller | ▼ Sell | Tax Withholding | 19,768 | $706K | 1/28/2026 |
| Sean Thomas Mullen | ▲ Buy | Option Exercise | 9,298 | — | 12/17/2025 |
| Sean Thomas Mullen | ▼ Sell | Tax Withholding | 4,194 | $120K | 12/17/2025 |
| Darren Burton | ▲ Buy | Option Exercise | 2,721 | — | 12/5/2025 |
| Darren Burton | ▼ Sell | Tax Withholding | 1,392 | $40K | 12/5/2025 |
| John E. Heller | ▲ Buy | Grant | 155,897 | $0 | 11/17/2025 |
| Jill L. Bruning | ▲ Buy | Grant | 17,817 | $0 | 11/17/2025 |
| Darren Burton | ▲ Buy | Grant | 22,271 | $0 | 11/17/2025 |
| Sean Thomas Mullen | ▲ Buy | Grant | 17,817 | $0 | 11/17/2025 |
| Travis Barton Johnson | ▲ Buy | Grant | 100,220 | $0 | 11/17/2025 |
| Mary Michele T. St. | ▲ Buy | Grant | 22,271 | $0 | 11/17/2025 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 1,178 | — | 11/17/2025 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 287 | $6K | 11/17/2025 |
| Stephen A. Arnette | ▲ Buy | Grant | 46,769 | $0 | 11/17/2025 |
| Steven J. Demetriou | ▲ Buy | Option Exercise | 43,396 | — | 11/17/2025 |
| Steven J. Demetriou | ▼ Sell | Tax Withholding | 17,077 | $367K | 11/17/2025 |
| Steven J. Demetriou | ▲ Buy | Grant | 111,355 | $0 | 11/17/2025 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 1,231 | $27K | 11/16/2025 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 3,681 | — | 11/16/2025 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 897 | $20K | 11/16/2025 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 4,596 | — | 11/16/2025 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 5,053 | — | 11/16/2025 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 1,120 | $25K | 11/16/2025 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 5,758 | — | 11/15/2025 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 1,403 | $31K | 11/15/2025 |
| John E. Heller | ▲ Buy | Option Exercise | 39,617 | — | 11/6/2025 |
| John E. Heller | ▼ Sell | Tax Withholding | 17,868 | $389K | 11/6/2025 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 12,701 | — | 11/6/2025 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 3,093 | $67K | 11/6/2025 |
| Travis Barton Johnson | ▲ Buy | Option Exercise | 12,097 | — | 11/6/2025 |
| Travis Barton Johnson | ▼ Sell | Tax Withholding | 3,642 | $79K | 11/6/2025 |
| Jill L. Bruning | ▲ Buy | Option Exercise | 4,838 | — | 11/6/2025 |
| Jill L. Bruning | ▼ Sell | Tax Withholding | 1,457 | $32K | 11/6/2025 |
| Sean Thomas Mullen | ▲ Buy | Option Exercise | 4,838 | — | 11/6/2025 |
| Sean Thomas Mullen | ▼ Sell | Tax Withholding | 1,621 | $35K | 11/6/2025 |
| Steven J. Demetriou | ▲ Buy | Option Exercise | 90,727 | — | 11/6/2025 |
| Steven J. Demetriou | ▼ Sell | Tax Withholding | 28,818 | $628K | 11/6/2025 |
| Lindsay Goldberg Employee Co-Inv. IV L.P. | ▼ Sell | Other | 1,132,839 | — | 5/8/2025 |
| Alan E. Goldberg | ▼ Sell | Other | 1,132,839 | — | 5/8/2025 |
| Goldberg 2014 LLC | ▼ Sell | Other | 1,132,839 | — | 5/8/2025 |
| Amentum Joint Venture GP LLC | ▼ Sell | Other | 2,433,022 | $0 | 5/8/2025 |
| Amentum Joint Venture GP LLC | ▲ Buy | Grant | 2,433,022 | $0 | 4/7/2025 |
| JACOBS SOLUTIONS INC. | ▼ Sell | Other | 19,464,174 | — | 3/13/2025 |
| Susan Leslie Ireland | ▲ Buy | Option Exercise | 3,447 | — | 3/5/2025 |
| John C. Vollmer | ▲ Buy | Option Exercise | 3,447 | — | 3/5/2025 |
| Vincent K. Brooks | ▲ Buy | Option Exercise | 3,447 | — | 3/5/2025 |
| Sandra E. Rowland | ▲ Buy | Option Exercise | 3,447 | — | 3/5/2025 |
| Ralph E. Eberhart | ▲ Buy | Option Exercise | 3,447 | — | 3/5/2025 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 521 | — | 3/4/2025 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 152 | $3K | 3/4/2025 |
| Stephen A. Arnette | ▲ Buy | Option Exercise | 1,230 | — | 3/3/2025 |
| Stephen A. Arnette | ▼ Sell | Tax Withholding | 365 | $7K | 3/3/2025 |
| Barbara Loughran | ▲ Buy | Open Market | 4,600 | $98K | 2/18/2025 |
| Steven J. Demetriou | ▲ Buy | Open Market | 100,000 | $2.1M | 2/12/2025 |
| John C. Vollmer | ▼ Sell | Other | 391,341 | — | 12/17/2024 |
| John E. Heller | ▼ Sell | Other | 91,794 | — | 12/17/2024 |
| Alan E. Goldberg | ▼ Sell | Other | 43,893,904 | — | 12/17/2024 |
| Amentum Joint Venture GP LLC | ▼ Sell | Other | 90,021,804 | $0 | 12/17/2024 |
| JACOBS SOLUTIONS INC. | ▼ Sell | Other | 124,084,108 | $0 | 9/23/2024 |
| Ralph E. Eberhart | ▼ Sell | Other | 26,439 | — | 9/18/2024 |
| Stephen A. Arnette | ▼ Sell | Other | 20,786 | — | 9/18/2024 |
| Steven J. Demetriou | ▼ Sell | Other | 520,893 | — | 9/18/2024 |
| Vincent K. Brooks | ▼ Sell | Other | 6,966 | — | 9/18/2024 |
AI Market Commentary
AI-generatedAll commentary →Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.
October 8, 2026
Amentum Faces Mixed Market Reaction After Deal and Analyst Upgrade
Amentum recently secured a preferred supplier role on a $2.8 billion Sellafield nuclear waste deal, which lifted the stock but also triggered a 5.5 % pullback. BNP Paribas upgraded the company to neutral, cutting its price target to $20, while analysts noted the firm’s focus on margin quality over revenue growth. The move comes amid a broader market rally for government‑consulting names, with Amentum’s shares showing a support rejection and a volume spike at the $20 level.
Amentum Faces Mixed Market Reaction After Deal and Analyst Upgrade. Amentum recently secured a preferred supplier role on a $2.8 billion Sellafield nuclear waste deal, which lifted the stock but also triggered a 5.5 % pullback. BNP Paribas upgraded the company to neutral, cutting its price target to $20, while analysts noted the firm’s focus on margin quality over revenue growth. The move comes amid a broader market rally for government‑consulting names, with Amentum’s shares showing a support rejection and a volume spike at the $20 level.