WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM)

Q4 2025 13F Holders as of 31 Dec 2025

Type / Class
Equity / Common Stock
Shares outstanding
2,560,567
Total 13F shares
2,127,909
Share change
-93,395
Total reported value
$4,420,867,336
Price per share
$2078.03
Number of holders
345
Value change
-$186,720,159
Number of buys
145
Number of sells
160

Institutional Holders of WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM) as of Q4 2025

As of 31 Dec 2025, WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM) was held by 345 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 2,127,909 shares. The largest 10 holders included VANGUARD GROUP INC, DIMENSIONAL FUND ADVISORS LP, NEUBERGER BERMAN GROUP LLC, BlackRock, Inc., FULLER & THALER ASSET MANAGEMENT, INC., COOKE & BIELER LP, FIDUCIARY MANAGEMENT INC /WI/, MORGAN STANLEY, Wallace Capital Management Inc., and Boston Partners. This page lists 345 institutional shareholders reporting positions in this security for the Q4 2025 filing period.
Investor Option Weight % Change % Value $ * Price Shares Share Change Activity Report Period
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.