A total of 329 institutions have reported a stake in White Mountains Insurance Group Ltd (NYSE:WTM) as of December 2025, according to recent 13F filings with the SEC.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 31 Dec, 2025 | 235,698 | -11,306 | -4.58% | $489,787,515.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Dec, 2025 | 156,604 | -613 | -0.39% | $325,427,647.00 |
| Neuberger Berman Group LLC | 31 Dec, 2025 | 129,654 | 14,639 | 12.73% | $269,424,901.00 |
| BlackRock, Inc. | 31 Dec, 2025 | 112,289 | -290 | -0.26% | $233,341,023.00 |
| FULLER & THALER ASSET MANAGEMENT, INC. | 31 Dec, 2025 | 108,172 | 81 | 0.07% | $224,785,147.00 |
| COOKE & BIELER LP | 31 Dec, 2025 | 106,579 | -1,272 | -1.18% | $221,474,359.00 |
| FIDUCIARY MANAGEMENT INC /WI/ | 31 Dec, 2025 | 90,333 | -4,050 | -4.29% | $187,714,684.00 |
| MORGAN STANLEY | 31 Dec, 2025 | 82,151 | -56,711 | -40.84% | $170,715,859.00 |
| Wallace Capital Management Inc. | 31 Dec, 2025 | 80,347 | -1,142 | -1.40% | $166,963,084.00 |
| Boston Partners | 31 Dec, 2025 | 76,911 | -7,534 | -8.92% | $159,727,916.00 |
| LONDON CO OF VIRGINIA | 31 Dec, 2025 | 58,697 | -8,105 | -12.13% | $121,996,162.00 |
| STATE STREET CORP | 31 Dec, 2025 | 50,663 | -3,781 | -6.94% | $105,279,234.00 |
| REINHART PARTNERS, LLC. | 31 Dec, 2025 | 43,973 | 2,364 | 5.68% | $91,413,050.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Dec, 2025 | 41,518 | -572 | -1.36% | $86,296,476.00 |
| LORD, ABBETT & CO. LLC | 31 Dec, 2025 | 33,796 | -3,123 | -8.46% | $70,229.00 |
| GENDELL JEFFREY L | 31 Dec, 2025 | 32,520 | 32,520 | 0.00% | $67,577,536.00 |
| NORGES BANK | 31 Dec, 2025 | 32,184 | 32,184 | 0.00% | $66,879,318.00 |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | 31 Dec, 2025 | 31,652 | 0 | 0.00% | $65,773,805.00 |
| BANK OF AMERICA CORP /DE/ | 31 Dec, 2025 | 28,806 | -10,006 | -25.78% | $59,859,784.00 |
| Cannell & Spears LLC | 31 Dec, 2025 | 28,115 | -173 | -0.61% | $58,422,970.00 |