NYSE: WTMWhite Mountains Insurance Group Ltd Stock Ownership - Who owns White Mountains Insurance Group?
Insider buying vs selling
Have White Mountains Insurance Group Ltd insiders been buying or selling?
Buy
Sell
| Name | Role | Date | Shares | Price | Value |
|---|---|---|---|---|---|
| Michaela Hildreth | MD Chief Accounting Officer | 2026-01-01 | 274 | $2.08k | $569.38kSell |
| Liam P. Caffrey | Chief Executive Officer | 2026-01-01 | 425 | $2.08k | $883.16kSell |
| Michael A. Papamichael | Chief Financial Officer | 2026-01-01 | 131 | $2.08k | $272.22kSell |
| Robert Lawrence Seelig | EVP General Counsel | 2026-01-01 | 398 | $2.08k | $827.06kSell |
| Reid Tarlton Campbell | Director | 2025-12-19 | 5,000 | $2.05k | $10.25MSell |
| George Manning Rountree | Chief Executive Officer | 2025-12-19 | 5,000 | $2.05k | $10.25MSell |
| Philip A. Gelston | Director | 2025-12-16 | 165 | $2.05k | $338.00kSell |
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Net Insider Buy/Sell (L12M) Ownership
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WTM Shareholders
What type of owners hold White Mountains Insurance Group Ltd stock?
Institutional
Insider
Retail
| Name | Hold | Shares | Value | Type |
|---|---|---|---|---|
| John Joseph Byrne | 30.92% | 789,535 | $1.73B | Insider |
| John Davies Gillespie | 11.87% | 303,039 | $662.14M | Insider |
| Vanguard Group Inc | 9.67% | 247,004 | $539.70M | Institution |
| Dimensional Fund Advisors LP | 6.16% | 157,217 | $343.52M | Institution |
| Morgan Stanley | 5.44% | 138,862 | $303.41M | Institution |
| Neuberger Berman Group LLC | 4.50% | 115,015 | $251.31M | Institution |
| Blackrock Inc | 4.41% | 112,579 | $245.99M | Institution |
| River Road Asset Management LLC | 4.29% | 109,588 | $239.45M | Institution |
| Fuller Thaler Asset Management Inc | 4.23% | 108,091 | $236.18M | Institution |
| Cooke Bieler LP | 4.22% | 107,851 | $235.65M | Institution |
WTM vs Property & Casualty Insurance Stocks
White Mountains Insurance Group Stock Ownership FAQ
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Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.