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 |
WTM insiders have sold more... subscribe to Premium to read more.
Net Insider Buy/Sell (L12M) Ownership
Be the first to know when WTM insiders and whales buy or sell their stock.
WTM Shareholders
What type of owners hold White Mountains Insurance Group Ltd stock?
Institutional
Insider
Retail
| Name | Hold | Shares | Value | Type |
|---|---|---|---|---|
| John Joseph Byrne | 31.88% | 789,535 | $1.65B | Insider |
| John Davies Gillespie | 12.24% | 303,039 | $634.11M | Insider |
| Vanguard Group Inc | 9.52% | 235,698 | $493.20M | Institution |
| Dimensional Fund Advisors LP | 6.32% | 156,604 | $327.69M | Institution |
| Neuberger Berman Group LLC | 5.24% | 129,654 | $271.30M | Institution |
| River Road Asset Management LLC | 4.88% | 120,880 | $252.94M | Institution |
| Blackrock Inc | 4.53% | 112,289 | $234.96M | Institution |
| Fuller Thaler Asset Management Inc | 4.37% | 108,172 | $226.35M | Institution |
| Cooke Bieler LP | 4.30% | 106,579 | $223.02M | Institution |
| Fiduciary Management Inc | 3.65% | 90,333 | $189.02M | Institution |
WTM vs Property & Casualty Insurance Stocks
White Mountains Insurance Group Stock Ownership FAQ
Company
AboutNewsBlogStock Investing FAQPlansPrivacy PolicyTerms of ServiceCancellation & RefundsPerformanceHelp GuidesContactTwitterYouTubeNewsletterWallStreetZen does not provide financial advice and does not issue recommendations or offers to buy stock or sell any security.
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.
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.