Q3 2025 13F Holders as of 9/30/2025
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Type / Class
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Equity / Common Stock
-
Shares outstanding
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2.55M
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Number of holders
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333
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Total 13F shares, excl. options
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2.33M
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Shares change
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+7K
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Total reported value, excl. options
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$3.89B
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Value change
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+$6.72M
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Number of buys
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147
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Number of sells
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-131
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Price
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$1,671.52
Significant Holders of WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM) as of Q3 2025
361 filings reported holding WTM - WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock as of Q3 2025.
WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM) has 333 institutional shareholders that have filed 13F forms with the Securities Exchange Commission (SEC).
These institutions hold a total of 2.33M shares
of 2.55M outstanding shares and own 91.25% of the company stock.
Largest 10 shareholders include VANGUARD GROUP INC (247K shares), DIMENSIONAL FUND ADVISORS LP (157K shares), MORGAN STANLEY (139K shares), NEUBERGER BERMAN GROUP LLC (115K shares), BlackRock, Inc. (113K shares), River Road Asset Management, LLC (110K shares), FULLER & THALER ASSET MANAGEMENT, INC. (108K shares), COOKE & BIELER LP (108K shares), FIDUCIARY MANAGEMENT INC /WI/ (94.4K shares), and Boston Partners (84.4K shares).
This table shows the top 333 institutional shareholders of the company equity. This data is sourced directly from the SEC via 13F filings.
| 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.