AMTM
Amentum Holdings, Inc. · Industrials · Aerospace & Defense
Momentum inputs (comparable managers):
holder breadth — ·
share flow — ·
net new positions +20.0%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 109 | -3 | 117.16M | $2.42B | +7 | −9 |
| Q1 2026 | 114 | +1 | 111.17M | $2.90B | +6 | −6 |
| Q4 2025 | 114 | +3 | 114.62M | $3.32B | +4 | — |
| Q3 2025 | 18 | 0 | 67.20M | $1.61B | +1 | −2 |
| Q2 2025 | 16 | +3 | 69.96M | $1.65B | +4 | −1 |
| Q1 2025 | 10 | -3 | 25.91M | $471.64M | +2 | −5 |
| Q4 2024 | 13 | -2 | 20.67M | $434.75M | +2 | −4 |
| Q3 2024 | 14 | +14 | 12.37M | $393.08M | +14 | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | PRIMECAP Management ✦ | 5.27M | New | $170.00M | 0.1% | New | 1 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 3.15M | New | $101.02M | 0.0% | New | 1 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 3.15M | New | $101.02M | 0.0% | New | 1 | SEC ↗ |
| 4 | Wellington Management ✦ | 935.08K | New | $30.16M | 0.0% | New | 1 | SEC ↗ |
| 5 | Wellington Management ✦ | 935.08K | New | $30.16M | 0.0% | New | 1 | SEC ↗ |
| 6 | Wellington Management ✦ | 935.08K | New | $30.16M | 0.0% | New | 1 | SEC ↗ |
| 7 | Wellington Management ✦ | 935.08K | New | $30.16M | 0.0% | New | 1 | SEC ↗ |
| 8 | Millennium Management ✦ | 671.77K | New | $21.66M | 0.0% | New | 1 | SEC ↗ |
| 9 | Citadel Advisors ✦ | 481.03K | New | $15.51M | 0.0% | New | 1 | SEC ↗ |
| 10 | Citadel Advisors ✦ | 481.03K | New | $15.51M | 0.0% | New | 1 | SEC ↗ |
| 11 | AQR Capital Management ✦ | 639.33K | New | $15.31M | 0.0% | New | 1 | SEC ↗ |
| 12 | AQR Capital Management ✦ | 639.33K | New | $15.31M | 0.0% | New | 1 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 639.33K | New | $15.31M | 0.0% | New | 1 | SEC ↗ |
| 14 | AQR Capital Management ✦ | 639.33K | New | $15.31M | 0.0% | New | 1 | SEC ↗ |
| 15 | Renaissance Technologies ✦ | 440.50K | New | $14.21M | 0.0% | New | 1 | SEC ↗ |
| 16 | Two Sigma Investments ✦ | 321.10K | New | $10.36M | 0.0% | New | 1 | SEC ↗ |
| 17 | T. Rowe Price ✦ | 174.56K | New | $5.63M | 0.0% | New | 1 | SEC ↗ |
| 18 | Adage Capital Partners ✦ | 118.03K | New | $3.81M | 0.0% | New | 1 | SEC ↗ |
| 19 | D. E. Shaw & Co. ✦ | 86.39K | New | $2.79M | 0.0% | New | 1 | SEC ↗ |
| 20 | Bridgewater Associates ✦ | 48.53K | New | $1.57M | 0.0% | New | 1 | SEC ↗ |
| 21 | Soros Fund Management ✦ | 27.00K | New | $870,782 | 0.0% | New | 1 | SEC ↗ |
| 22 | Point72 Asset Management ✦ | 6.01K | New | $193,800 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| PRIMECAP Management | $170.00M | 0.1% |
| Geode Capital Management | $101.02M | 0.0% |
| Geode Capital Management | $101.02M | 0.0% |
| Wellington Management | $30.16M | 0.0% |
| Wellington Management | $30.16M | 0.0% |
| Wellington Management | $30.16M | 0.0% |
| Wellington Management | $30.16M | 0.0% |
| Millennium Management | $21.66M | 0.0% |
| Citadel Advisors | $15.51M | 0.0% |
| Citadel Advisors | $15.51M | 0.0% |
| AQR Capital Management | $15.31M | 0.0% |
| AQR Capital Management | $15.31M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 482 holders, 210.87M shares, $5.10B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.