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 | 32.00% | 789,535 | $1.70B | Insider |
| John Davies Gillespie | 12.28% | 303,039 | $653.05M | Insider |
| Vanguard Group Inc | 9.55% | 235,698 | $507.93M | Institution |
| Dimensional Fund Advisors LP | 6.35% | 156,604 | $337.48M | Institution |
| Neuberger Berman Group LLC | 5.26% | 129,654 | $279.41M | Institution |
| River Road Asset Management LLC | 4.90% | 120,880 | $260.50M | Institution |
| Blackrock Inc | 4.55% | 112,289 | $241.98M | Institution |
| Fuller Thaler Asset Management Inc | 4.38% | 108,172 | $233.11M | Institution |
| Cooke Bieler LP | 4.32% | 106,579 | $229.68M | Institution |
| Fiduciary Management Inc | 3.66% | 90,333 | $194.67M | 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.