ACGL
Arch Capital Group Ltd. · Financial Services · Insurance - Diversified
Momentum inputs (comparable managers):
holder breadth +10.5% ·
share flow -0.2% ·
net new positions +4.8%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 158 | +1 | 244.83M | $23.79B | +6 | −6 |
| Q1 2026 | 161 | -1 | 250.56M | $24.03B | +2 | −4 |
| Q4 2025 | 161 | -1 | 274.58M | $26.33B | +1 | −1 |
| Q3 2025 | 21 | +2 | 133.72M | $12.13B | +2 | −1 |
| Q2 2025 | 17 | 0 | 115.43M | $10.51B | — | — |
| Q1 2025 | 14 | 0 | 38.20M | $3.67B | +1 | −1 |
| Q4 2024 | 14 | -2 | 40.87M | $3.77B | +1 | −3 |
| Q3 2024 | 15 | 0 | 25.03M | $2.80B | +1 | −1 |
| Q2 2024 | 15 | — | 26.53M | $2.67B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 42.31M | -0.2% | $3.84B | 0.1% | ▼ Trim | 2 | SEC ↗ ×6 |
| 2 | BlackRock ✦ (passive) | 32.46M | -1.4% | $2.95B | 0.1% | ▼ Trim | 2 | SEC ↗ ×21 |
| 3 | State Street Global Advisors ✦ (passive) | 16.77M | -1.0% | $1.52B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 4 | JPMorgan Chase ✦ | 16.38M | — | $1.49B | 0.0% | n/c | 1 | SEC ↗ ×38 |
| 5 | Geode Capital Management ✦ (passive) | 10.69M | +1.8% | $966.63M | 0.1% | ▲ Add | 6 | SEC ↗ ×2 |
| 6 | Morgan Stanley ✦ | 4.26M | — | $386.14M | 0.0% | n/c | 1 | SEC ↗ ×14 |
| 7 | Goldman Sachs Group ✦ | 2.79M | — | $253.11M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 8 | Two Sigma Investments ✦ | 1.90M | +112.4% | $171.95M | 0.3% | ▲ Add | 6 | SEC ↗ |
| 9 | Fidelity (FMR) ✦ | 1.25M | +18.0% | $113.32M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 10 | AQR Capital Management ✦ | 940.14K | -15.9% | $84.84M | 0.1% | ▼ Trim | 6 | SEC ↗ ×5 |
| 11 | Marshall Wace ✦ | 934.29K | +3918.3% | $84.77M | 0.1% | ▲ Add | 4 | SEC ↗ ×3 |
| 12 | Millennium Management ✦ | 921.94K | -50.0% | $83.65M | 0.1% | ▼ Trim | 6 | SEC ↗ |
| 13 | T. Rowe Price ✦ | 613.99K | -17.6% | $55.71M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 14 | D. E. Shaw & Co. ✦ | 613.44K | +80.9% | $55.66M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 15 | Bridgewater Associates ✦ | 317.69K | +63.5% | $28.82M | 0.1% | ▲ Add | 6 | SEC ↗ |
| 16 | Arrowstreet Capital ✦ | 188.55K | New | $17.11M | 0.0% | New | 1 | SEC ↗ |
| 17 | Renaissance Technologies ✦ | 136.10K | New | $12.35M | 0.0% | New | 1 | SEC ↗ |
| 18 | Citadel Advisors ✦ | 107.76K | -84.2% | $9.78M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 19 | Adage Capital Partners ✦ | 55.27K | +229.0% | $5.01M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 20 | Gotham Asset Management ✦ | 48.44K | +88.4% | $4.39M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 21 | Wellington Management ✦ | 29.05K | -96.6% | $2.64M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Arrowstreet Capital | $17.11M | 0.0% |
| Renaissance Technologies | $12.35M | 0.0% |
Exited
| Norges Bank | $441.55M | was 0.1% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 906 holders, 310.92M shares, $28.97B 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.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 11.01K sh · $1.09M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology