WTM
White Mountains Insurance Group, Ltd. · Financial Services · Insurance - Diversified
Momentum inputs (comparable managers):
holder breadth -10.0% ·
share flow -5.6% ·
net new positions -11.1%
· formula
Broad distribution: falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 1 | 0 | 692 | $1.22M | n/a | n/a |
| Q2 2026 | 101 | -4 | 1.16M | $2.41B | +3 | −6 |
| Q1 2026 | 107 | 0 | 1.13M | $2.49B | +3 | −4 |
| Q4 2025 | 108 | +2 | 1.27M | $2.64B | +3 | n/a |
| Q3 2025 | 16 | +1 | 649.64K | $1.09B | +1 | −1 |
| Q2 2025 | 13 | -1 | 533.60K | $958.13M | +1 | −2 |
| Q1 2025 | 11 | +1 | 169.09K | $325.53M | +1 | n/a |
| Q4 2024 | 10 | 0 | 193.12K | $375.52M | n/a | n/a |
| Q3 2024 | 9 | -1 | 149.43K | $253.48M | n/a | −1 |
| Q2 2024 | 10 | n/a | 158.36K | $287.38M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Wellington Management ✦ | 60.67K | -13.1% | $102.92M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 2 | Geode Capital Management ✦ (passive) | 39.84K | +0.7% | $67.60M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 3 | Norges Bank ✦ (passive) | 30.67K | +1.9% | $52.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | AQR Capital Management ✦ | 10.91K | +4.4% | $18.49M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 5 | D. E. Shaw & Co. ✦ | 3.24K | -10.0% | $5.50M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 6 | Renaissance Technologies ✦ | 1.90K | -5.0% | $3.22M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 7 | T. Rowe Price ✦ | 1.44K | +5.2% | $2.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | Millennium Management ✦ | 394 | +8.2% | $668,303 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 9 | Two Sigma Investments ✦ | 356 | +0.8% | $603,847 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Bridgewater Associates | $1.37M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 363 holders, 2.21M shares, $4.62B 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.