Security record · archived quarter
AMTM
Amentum Holdings, Inc. · Industrials · Aerospace & Defense
18Tracked holders
0Δ holders
67.20MShares held
$1.61BReported value
+1New positions
−2Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -4.9% · net new positions -5.6% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 108 | -3 | 117.14M | $2.42B | +7 | −10 |
| 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 | — |
Who holds it · Q3 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 17.99M | -5.3% | $430.87M | 0.0% | ▼ Trim | 2 | SEC ↗ ×14 |
| 2 | The Vanguard Group ✦ (passive) | 15.55M | -5.9% | $372.53M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 3 | PRIMECAP Management ✦ | 11.92M | -0.9% | $285.45M | 0.2% | ▼ Trim | 5 | SEC ↗ |
| 4 | State Street Global Advisors ✦ (passive) | 6.83M | -3.5% | $163.66M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 5 | Fidelity (FMR) ✦ | 6.24M | +36.3% | $149.33M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 6 | Geode Capital Management ✦ (passive) | 2.65M | +5.6% | $63.59M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 7 | Morgan Stanley ✦ | 1.81M | — | $43.26M | 0.0% | n/c | 1 | SEC ↗ ×14 |
| 8 | Point72 Asset Management ✦ | 1.38M | +293.9% | $33.07M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 9 | Goldman Sachs Group ✦ | 811.93K | — | $19.45M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 10 | Millennium Management ✦ | 640.80K | -86.3% | $15.35M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 11 | Two Sigma Investments ✦ | 399.12K | +2807.2% | $9.56M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 12 | Gotham Asset Management ✦ | 244.83K | New | $5.86M | 0.0% | New | 1 | SEC ↗ |
| 13 | JPMorgan Chase ✦ | 209.54K | — | $5.02M | 0.0% | n/c | 1 | SEC ↗ ×20 |
| 14 | AQR Capital Management ✦ | 165.21K | -52.8% | $3.96M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 15 | T. Rowe Price ✦ | 118.17K | +11.3% | $2.83M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 16 | Citadel Advisors ✦ | 117.97K | -65.6% | $2.83M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 17 | GAMCO Investors ✦ | 99.64K | -8.3% | $2.39M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 18 | Wellington Management ✦ | 19.69K | -67.6% | $471,528 | 0.0% | ▼ Trim | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Gotham Asset Management | $5.86M | 0.0% |
Exited
| Norges Bank | $51.01M | was 0.0% |
| Marshall Wace | $1.77M | was 0.0% |
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.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Aug 06
SC 13G — PRIMECAP MANAGEMENT CO/CA/
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q3 2025 ·
Methodology ·
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