Companies / Amentum Holdings, Inc. / Activity
Activity — Amentum Holdings, Inc.
21 moves.
Top impactInsider · CEO movesInsider · biggest buysInsider · biggest sellsInstitution · biggest movesInstitution · new positions
| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q2 2026 as of | Mawer Investment Management Ltd. 13F manager | New | Common stock | $7.64M | +370K | 369,557 0.15% of shares | medium |
| Q4 2025 as of | First National Bank of Omaha 13F manager | New | Common stock | $5.21M | +178K | 177,700 0.07% of shares | medium |
| Q3 2024 as of | Barclays PLC 13F manager | New | Common stock | $5.15M | +160K | 159,813 0.07% of shares | medium |
| Q1 2026 as of | Wedge Capital Management L L P/NC 13F manager | New | Common stock | $4.29M | +165K | 164,666 0.07% of shares | low |
| Q1 2026 as of | D. E. Shaw & Co., Inc. 13F manager | New | Common stock | $1.73M | +66K | 66,171 0.03% of shares | low |
| Q4 2025 as of | Steadtrust LLC 13F manager | New | Common stock | $1.46M | +50K | 50,400 0.02% of shares | low |
| Q1 2026 as of | Walleye Trading LLC 13F manager | New | Common stock | $744.5K | +29K | 28,548 0.01% of shares | low |
| Q1 2026 as of | Oppenheimer Asset Management Inc. 13F manager | New | Common stock | $734.3K | +28K | 28,154 0.01% of shares | low |
| Q4 2025 as of | Oxford Asset Management LLP 13F manager | New | Common stock | $540.2K | +19K | 18,629 <0.01% of shares | low |
| Q1 2026 as of | Aristeia Capital, L.L.C. 13F manager | New | Common stock | $537.4K | +21K | 20,605 <0.01% of shares | low |
| Q3 2024 as of | Chesapeake Asset Management LLC 13F manager | New | Common stock | $473.2K | +15K | 14,673 <0.01% of shares | low |
| Q3 2024 as of | Ontario Teachers Pension Plan Board 13F manager | New | Common stock | $298.4K | +9K | 9,254 <0.01% of shares | low |
| Q1 2026 as of | Alpine Woods Capital Investors, LLC 13F manager | New | Common stock | $219.1K | +8K | 8,402 <0.01% of shares | low |
| Q4 2025 as of | Danske Bank A/S 13F manager | New | Common stock | $114.9K | +4K | 3,962 <0.01% of shares | low |
| Q1 2026 as of | Peak6 LLC 13F manager | New | Common stock | $72.6K | +3K | 2,783 <0.01% of shares | low |
| Q3 2024 as of | Ransom Advisory, Ltd 13F manager | New | Common stock | $16.1K | +500 | 500 <0.01% of shares | low |
| Q2 2025 as of | Virtus Advisers, LLC 13F manager | New | Common stock | $2.9K | +121 | 121 <0.01% of shares | low |
| Q2 2026 as of | Harbor Capital Advisors, Inc. 13F manager | New | Common stock | $816 | +40K | 39,501 0.02% of shares | low |
| Q3 2024 as of | Leonteq Securities AG 13F manager | New | Common stock | $710 | +22 | 22 <0.01% of shares | low |
| Q3 2024 as of | Prestige Wealth Management Group LLC 13F manager | New | Common stock | $452 | +14 | 14 <0.01% of shares | low |
| Q1 2026 as of | Janney Montgomery Scott LLC 13F manager | New | Common stock | $332 | +13K | 12,728 <0.01% of shares | low |