Security record · archived quarter
WTM
White Mountains Insurance Group, Ltd. · Financial Services · Insurance - Diversified
108Tracked holders
+2Δ holders
1.27MShares held
$2.64BReported value
+3New positions
−0Exits
Momentum inputs (comparable managers):
holder breadth +1.9% ·
share flow -5.7% ·
net new positions +2.8%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 100 | -5 | 1.16M | $2.41B | +2 | −6 |
| Q1 2026 | 107 | 0 | 1.13M | $2.49B | +3 | −4 |
| Q4 2025 | 108 | +2 | 1.27M | $2.64B | +3 | — |
| 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 | — |
| Q4 2024 | 10 | 0 | 193.12K | $375.52M | — | — |
| Q3 2024 | 9 | -1 | 149.43K | $253.48M | — | −1 |
| Q2 2024 | 10 | — | 158.36K | $287.38M | — | — |
Who holds it · Q4 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 235.70K | -4.6% | $489.79M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 2 | The Vanguard Group ✦ (passive) | 235.70K | -4.6% | $489.79M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 3 | The Vanguard Group ✦ (passive) | 235.70K | -4.6% | $489.79M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 4 | The Vanguard Group ✦ (passive) | 235.70K | -4.6% | $489.79M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 5 | The Vanguard Group ✦ (passive) | 235.70K | -4.6% | $489.79M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 6 | Dimensional Fund Advisors Lp | 156.60K | — | $325.43M | 0.1% | n/c | 1 | SEC ↗ |
| 7 | Dimensional Fund Advisors Lp | 156.60K | — | $325.43M | 0.1% | n/c | 1 | SEC ↗ |
| 8 | Dimensional Fund Advisors Lp | 156.60K | — | $325.43M | 0.1% | n/c | 1 | SEC ↗ |
| 9 | Dimensional Fund Advisors Lp | 156.60K | — | $325.43M | 0.1% | n/c | 1 | SEC ↗ |
| 10 | Dimensional Fund Advisors Lp | 156.60K | — | $325.43M | 0.1% | n/c | 1 | SEC ↗ |
| 11 | Neuberger Berman Group LLC | 129.65K | — | $269.42M | 0.2% | n/c | 1 | SEC ↗ |
| 12 | Neuberger Berman Group LLC | 129.65K | — | $269.42M | 0.2% | n/c | 1 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 20 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 21 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 22 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 23 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 24 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 25 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 26 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 27 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 28 | BlackRock ✦ (passive) | 112.29K | -0.3% | $233.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 29 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 30 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 31 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 32 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 33 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 34 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 35 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 36 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 37 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 38 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 39 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 40 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 41 | Morgan Stanley ✦ | 82.15K | -40.8% | $170.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 42 | Boston Partners | 76.91K | — | $159.73M | 0.2% | n/c | 1 | SEC ↗ |
| 43 | Boston Partners | 76.91K | — | $159.73M | 0.2% | n/c | 1 | SEC ↗ |
| 44 | Boston Partners | 76.91K | — | $159.73M | 0.2% | n/c | 1 | SEC ↗ |
| 45 | Boston Partners | 76.91K | — | $159.73M | 0.2% | n/c | 1 | SEC ↗ |
| 46 | State Street Global Advisors ✦ (passive) | 50.66K | -6.9% | $105.28M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 47 | Geode Capital Management ✦ (passive) | 41.52K | -1.4% | $86.30M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 48 | Geode Capital Management ✦ (passive) | 41.52K | -1.4% | $86.30M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 49 | Norges Bank ✦ (passive) | 32.18K | New | $66.88M | 0.0% | New | 1 | SEC ↗ |
| 50 | Bank Of America Corp /De/ | 28.81K | — | $59.87M | 0.0% | n/c | 1 | SEC ↗ |
| 51 | Bank Of America Corp /De/ | 28.81K | — | $59.87M | 0.0% | n/c | 1 | SEC ↗ |
| 52 | Bank Of America Corp /De/ | 28.81K | — | $59.87M | 0.0% | n/c | 1 | SEC ↗ |
| 53 | Bank Of America Corp /De/ | 28.81K | — | $59.87M | 0.0% | n/c | 1 | SEC ↗ |
| 54 | Bank Of America Corp /De/ | 28.81K | — | $59.87M | 0.0% | n/c | 1 | SEC ↗ |
| 55 | Bank Of America Corp /De/ | 28.81K | — | $59.87M | 0.0% | n/c | 1 | SEC ↗ |
| 56 | Bank Of America Corp /De/ | 28.81K | — | $59.87M | 0.0% | n/c | 1 | SEC ↗ |
| 57 | Raymond James Financial Inc | 23.97K | — | $49.81M | 0.0% | n/c | 1 | SEC ↗ |
| 58 | Raymond James Financial Inc | 23.97K | — | $49.81M | 0.0% | n/c | 1 | SEC ↗ |
| 59 | Raymond James Financial Inc | 23.97K | — | $49.81M | 0.0% | n/c | 1 | SEC ↗ |
| 60 | Charles Schwab Investment… | 23.24K | — | $48.29M | 0.0% | n/c | 1 | SEC ↗ |
| 61 | Allspring Global Investments… | 20.19K | — | $41.23M | 0.1% | n/c | 1 | SEC ↗ |
| 62 | Allspring Global Investments… | 20.19K | — | $41.23M | 0.1% | n/c | 1 | SEC ↗ |
| 63 | Brown Advisory Inc | 18.96K | — | $39.39M | 0.1% | n/c | 1 | SEC ↗ |
| 64 | Brown Advisory Inc | 18.96K | — | $39.39M | 0.1% | n/c | 1 | SEC ↗ |
| 65 | Brown Advisory Inc | 18.96K | — | $39.39M | 0.1% | n/c | 1 | SEC ↗ |
| 66 | Northern Trust Corp | 16.67K | — | $34.63M | 0.0% | n/c | 1 | SEC ↗ |
| 67 | Northern Trust Corp | 16.67K | — | $34.63M | 0.0% | n/c | 1 | SEC ↗ |
| 68 | Northern Trust Corp | 16.67K | — | $34.63M | 0.0% | n/c | 1 | SEC ↗ |
| 69 | Northern Trust Corp | 16.67K | — | $34.63M | 0.0% | n/c | 1 | SEC ↗ |
| 70 | Northern Trust Corp | 16.67K | — | $34.63M | 0.0% | n/c | 1 | SEC ↗ |
| 71 | Wellington Management ✦ | 15.93K | -17.1% | $33.10M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 72 | Wellington Management ✦ | 15.93K | -17.1% | $33.10M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 73 | Wellington Management ✦ | 15.93K | -17.1% | $33.10M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 74 | Wellington Management ✦ | 15.93K | -17.1% | $33.10M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 75 | Envestnet Asset Management Inc | 15.80K | — | $32.83M | 0.0% | n/c | 1 | SEC ↗ |
| 76 | Wcm Investment Management, Llc | 10.68K | — | $22.20M | 0.0% | n/c | 1 | SEC ↗ |
| 77 | Wells Fargo & Company/Mn | 9.14K | — | $18.99M | 0.0% | n/c | 1 | SEC ↗ |
| 78 | Wells Fargo & Company/Mn | 9.14K | — | $18.99M | 0.0% | n/c | 1 | SEC ↗ |
| 79 | Wells Fargo & Company/Mn | 9.14K | — | $18.99M | 0.0% | n/c | 1 | SEC ↗ |
| 80 | Wells Fargo & Company/Mn | 9.14K | — | $18.99M | 0.0% | n/c | 1 | SEC ↗ |
| 81 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 82 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 83 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 84 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 85 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 86 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 87 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 88 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 89 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 90 | Bank of New York Mellon Corp | 8.83K | — | $18.35M | 0.0% | n/c | 1 | SEC ↗ |
| 91 | D. E. Shaw & Co. ✦ | 8.59K | +242.1% | $17.86M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 92 | D. E. Shaw & Co. ✦ | 8.59K | +242.1% | $17.86M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 93 | Sei Investments Co | 7.92K | — | $16.45M | 0.0% | n/c | 1 | SEC ↗ |
| 94 | Sei Investments Co | 7.92K | — | $16.45M | 0.0% | n/c | 1 | SEC ↗ |
| 95 | UBS AM, a distinct business unit of… | 7.66K | — | $15.91M | 0.0% | n/c | 1 | SEC ↗ |
| 96 | UBS AM, a distinct business unit of… | 7.66K | — | $15.91M | 0.0% | n/c | 1 | SEC ↗ |
| 97 | UBS AM, a distinct business unit of… | 7.66K | — | $15.91M | 0.0% | n/c | 1 | SEC ↗ |
| 98 | UBS AM, a distinct business unit of… | 7.66K | — | $15.91M | 0.0% | n/c | 1 | SEC ↗ |
| 99 | UBS AM, a distinct business unit of… | 7.66K | — | $15.91M | 0.0% | n/c | 1 | SEC ↗ |
| 100 | UBS AM, a distinct business unit of… | 7.66K | — | $15.91M | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Norges Bank | $66.88M | 0.0% |
Exited
| No tracked exits this quarter. |
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.
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: Q4 2025 ·
Methodology ·
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