Data as of Q4 2025 (Dec 31, 2025)
WTM

WHITE MTNS INS GROUP LTD

Institutional Ownership · Q4 2025

Filing: Q4 2025

WHITE MTNS INS GROUP LTD (WTM) is held by 334 institutional investors with combined holdings of $3.9B. Major holders include VANGUARD GROUP INC, DIMENSIONAL FUND ADVISORS, Neuberger Berman Group LL.

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Institutional Holders
334
Total Value
$3.9B
Ownership %
76.3%

🏦 Top Institutional Holders

VANGUARD GROUP INC
235.7K shares
$489.8M
9.52% ownership
DIMENSIONAL FUND ADVISORS LP
156.6K shares
$325.4M
6.32% ownership
Neuberger Berman Group LLC
129.7K shares
$269.4M
5.24% ownership
BlackRock, Inc. (BLK)
112.3K shares
$233.3M
4.53% ownership
COOKE & BIELER LP
106.6K shares
$221.5M
4.30% ownership

📊 Financials

Income statement, balance sheet, and cash flow from SEC filings.

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