Thompson Siegel & Walmsley LLC
- SEC CIK
- 0001008322
- Latest filing
- Aug 11, 2026
AMTM holding history
Amentum Holdings, Inc. in every 13F filed by Thompson Siegel & Walmsley LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.
AMTM overviewAll 13F holders of AMTMFull Q2 2026 holdings
- Shares (Q2 2026)
- 2,281,945
- Value
- $47.2M
- % of portfolio
- 0.9%
- Quarters held
- 8
- Since Q3 2024
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 2,281,945 | $47.2M | 0.9% | +756,061+49.5% | Added | Holders |
| Q1 2026 | 1,525,884 | $39.8M | 0.7% | −395,925−20.6% | Reduced | Holders |
| Q4 2025 | 1,921,809 | $55.7M | 0.9% | −808,489−29.6% | Reduced | Holders |
| Q3 2025 | 2,730,298 | $65.4M | 1.1% | −56,615−2.0% | Reduced | Holders |
| Q2 2025 | 2,786,913 | $65.8M | 1.1% | −539,465−16.2% | Reduced | Holders |
| Q1 2025 | 3,326,378 | $60.5M | 1.0% | +1,377,694+70.7% | Added | Holders |
| Q4 2024 | 1,948,684 | $41.0M | 0.6% | +1,606,442+469.4% | Added | Holders |
| Q3 2024 | 342,242 | $11.0M | 0.2% | +342,242 | New | Holders |