Security record · archived quarter
WRB
W. R. Berkley Corporation · Financial Services · Insurance - Property & Casualty
21Tracked holders
+1Δ holders
94.67MShares held
$6.95BReported value
+2New positions
−1Exits
Momentum inputs (comparable managers):
holder breadth +5.0% ·
share flow -0.4% ·
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 Q2 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 156 | +3 | 170.02M | $12.01B | +7 | −3 |
| Q1 2026 | 155 | 0 | 169.37M | $11.23B | +5 | −6 |
| Q4 2025 | 154 | -3 | 198.67M | $13.93B | +1 | −3 |
| Q3 2025 | 22 | -1 | 111.59M | $8.55B | +1 | −3 |
| Q2 2025 | 21 | +1 | 94.67M | $6.95B | +2 | −1 |
| Q1 2025 | 17 | +1 | 32.68M | $2.32B | +1 | — |
| Q4 2024 | 16 | 0 | 32.24M | $1.89B | +1 | −1 |
| Q3 2024 | 15 | 0 | 16.99M | $961.87M | +2 | −2 |
| Q2 2024 | 15 | — | 11.87M | $932.35M | — | — |
Who holds it · Q2 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 36.96M | — | $2.72B | 0.0% | n/c | 1 | SEC ↗ |
| 2 | The Vanguard Group ✦ (passive) | 36.96M | — | $2.72B | 0.0% | n/c | 1 | SEC ↗ |
| 3 | The Vanguard Group ✦ (passive) | 36.96M | — | $2.72B | 0.0% | n/c | 1 | SEC ↗ |
| 4 | The Vanguard Group ✦ (passive) | 36.96M | — | $2.72B | 0.0% | n/c | 1 | SEC ↗ |
| 5 | The Vanguard Group ✦ (passive) | 36.96M | — | $2.72B | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 20 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 21 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 22 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 23 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 24 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 25 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 26 | BlackRock ✦ (passive) | 25.24M | — | $1.85B | 0.0% | n/c | 1 | SEC ↗ |
| 27 | State Street Global Advisors ✦ (passive) | 14.77M | -1.5% | $1.09B | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 28 | Geode Capital Management ✦ (passive) | 8.19M | +3.7% | $599.27M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 29 | Geode Capital Management ✦ (passive) | 8.19M | +3.7% | $599.27M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 30 | Norges Bank ✦ (passive) | 5.01M | +5.3% | $367.92M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 31 | AQR Capital Management ✦ | 1.79M | +15.9% | $131.33M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 32 | AQR Capital Management ✦ | 1.79M | +15.9% | $131.33M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 33 | AQR Capital Management ✦ | 1.79M | +15.9% | $131.33M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 34 | AQR Capital Management ✦ | 1.79M | +15.9% | $131.33M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 35 | AQR Capital Management ✦ | 1.79M | +15.9% | $131.33M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 36 | AQR Capital Management ✦ | 1.79M | +15.9% | $131.33M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 37 | AQR Capital Management ✦ | 1.79M | +15.9% | $131.33M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 38 | AQR Capital Management ✦ | 1.79M | +15.9% | $131.33M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 39 | Arrowstreet Capital ✦ | 1.07M | -21.3% | $78.95M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 40 | T. Rowe Price ✦ | 436.73K | -0.8% | $32.09M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 41 | T. Rowe Price ✦ | 436.73K | -0.8% | $32.09M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 42 | Adage Capital Partners ✦ | 274.52K | New | $20.17M | 0.0% | New | 1 | SEC ↗ |
| 43 | Fidelity (FMR) ✦ | 190.94K | — | $14.03M | 0.0% | n/c | 1 | SEC ↗ |
| 44 | Fidelity (FMR) ✦ | 190.94K | — | $14.03M | 0.0% | n/c | 1 | SEC ↗ |
| 45 | Fidelity (FMR) ✦ | 190.94K | — | $14.03M | 0.0% | n/c | 1 | SEC ↗ |
| 46 | Fidelity (FMR) ✦ | 190.94K | — | $14.03M | 0.0% | n/c | 1 | SEC ↗ |
| 47 | Marshall Wace ✦ | 178.75K | -76.0% | $13.13M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 48 | Marshall Wace ✦ | 178.75K | -76.0% | $13.13M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 49 | Marshall Wace ✦ | 178.75K | -76.0% | $13.13M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 50 | Wellington Management ✦ | 143.92K | +18.1% | $10.57M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 51 | Wellington Management ✦ | 143.92K | +18.1% | $10.57M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 52 | Gotham Asset Management ✦ | 116.21K | +136.7% | $8.54M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 53 | GAMCO Investors ✦ | 91.99K | -0.8% | $6.76M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 54 | Millennium Management ✦ | 61.83K | -58.7% | $4.54M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 55 | Markel Group ✦ | 60.75K | 0.0% | $4.46M | 0.0% | Held | 5 | SEC ↗ |
| 56 | Renaissance Technologies ✦ | 44.77K | -86.6% | $3.29M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 57 | Citadel Advisors ✦ | 18.20K | -75.5% | $1.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 58 | Citadel Advisors ✦ | 18.20K | -75.5% | $1.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 59 | Two Sigma Investments ✦ | 13.47K | -58.5% | $989,494 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 60 | Fisher Asset Management ✦ | 3.67K | -6.7% | $269,531 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 61 | D. E. Shaw & Co. ✦ | 3.16K | New | $232,239 | 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
| Adage Capital Partners | $20.17M | 0.0% |
| D. E. Shaw & Co. | $232,239 | 0.0% |
Exited
| Bridgewater Associates | $815,422 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 2 holders, 10.18K shares, $158,025 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.
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: Q2 2025 ·
Methodology ·
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