WRB
W. R. Berkley Corporation · Financial Services · Insurance - Property & Casualty
Momentum inputs (comparable managers):
holder breadth +6.2% ·
share flow +1.4% ·
net new positions +5.9%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| 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 | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 15.00M | -0.7% | $1.07B | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 7.90M | +2.7% | $560.42M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 7.90M | +2.7% | $560.42M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 4 | Norges Bank ✦ (passive) | 4.76M | +2.1% | $338.55M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 5 | AQR Capital Management ✦ | 1.54M | +18.5% | $109.75M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 6 | AQR Capital Management ✦ | 1.54M | +18.5% | $109.75M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 7 | AQR Capital Management ✦ | 1.54M | +18.5% | $109.75M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 8 | AQR Capital Management ✦ | 1.54M | +18.5% | $109.75M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 9 | AQR Capital Management ✦ | 1.54M | +18.5% | $109.75M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 10 | AQR Capital Management ✦ | 1.54M | +18.5% | $109.75M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 11 | Arrowstreet Capital ✦ | 1.36M | +68.0% | $97.13M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 12 | Marshall Wace ✦ | 743.64K | +571.5% | $52.92M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 13 | Marshall Wace ✦ | 743.64K | +571.5% | $52.92M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 14 | Marshall Wace ✦ | 743.64K | +571.5% | $52.92M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 15 | Marshall Wace ✦ | 743.64K | +571.5% | $52.92M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 16 | T. Rowe Price ✦ | 440.12K | +2.9% | $31.32M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 17 | T. Rowe Price ✦ | 440.12K | +2.9% | $31.32M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 18 | Renaissance Technologies ✦ | 334.65K | +157.3% | $23.81M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 19 | Millennium Management ✦ | 149.82K | -83.5% | $10.66M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 20 | Wellington Management ✦ | 121.84K | -76.5% | $8.67M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 21 | Wellington Management ✦ | 121.84K | -76.5% | $8.67M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 22 | GAMCO Investors ✦ | 92.75K | -4.7% | $6.60M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 23 | Citadel Advisors ✦ | 74.46K | -79.7% | $5.30M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 24 | Markel Group ✦ | 60.75K | 0.0% | $4.32M | 0.0% | Held | 4 | SEC ↗ |
| 25 | Gotham Asset Management ✦ | 49.09K | +255.7% | $3.49M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 26 | Two Sigma Investments ✦ | 32.43K | +12.1% | $2.31M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 27 | Bridgewater Associates ✦ | 11.46K | New | $815,422 | 0.0% | New | 1 | SEC ↗ |
| 28 | Fisher Asset Management ✦ | 3.93K | +7.2% | $279,904 | 0.0% | ▲ Add | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Bridgewater Associates | $815,422 | 0.0% |
Exited
| No tracked exits this quarter. |
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.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.