Philip A. Gelston, a director at White Mountains Insurance Group Ltd. ($WTM), made one open market sale of common shares in the last year, totaling about $2,000, with the most recent on December 16, 2025. This ranks him 11,505th among 11,678 insiders by sale value, well below the average of $8.6 million across 6.4 transactions. He had no open market purchases.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 16, 2025 | WHITE MOUNTAINS INSURANCE GROUP LTD | $WTM | Gelston Philip A | Director | S | Common Shares | 165 | $2048.51 | 1,568.0000 | 2,542,300 | 9.52% | 0.01% |
| May 22, 2025 | WHITE MOUNTAINS INSURANCE GROUP LTD | $WTM | Gelston Philip A | Director | A | Common Shares | 150 | $0.00 | 1,733.0000 | 2,532,200 | 9.48% | 0.01% |
| May 23, 2024 | WHITE MOUNTAINS INSURANCE GROUP LTD | $WTM | Gelston Philip A | Director | A | Common Shares | 165 | $0.00 | 1,583.0000 | 2,527,300 | 11.64% | 0.01% |