White Mountains Insurance Group Ltd (WTM) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

3,078,471Shares Outstanding
40,955Shares held by institutions
$91,363,643Value of institutional holdings
85.25%Institutional ownership %
2.17%Shares Changed QoQ
237No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

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.

329 Institutional Holders

40,955 Total Shares Held
Download Data
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