George Manning Rountree, CEO of White Mountains Insurance Group Ltd. ($WTM), made one open market sale of common shares in the last year, totaling $2,050. His most recent sale occurred on December 19, 2025. This activity ranks 11,503rd among 11,678 insiders, well below the average sale amount of $8.6 million over about 6.4 transactions. He recorded 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. 19, 2025 | WHITE MOUNTAINS INSURANCE GROUP LTD | $WTM | Rountree George Manning | Chief Executive Officer | S | Common Shares | 5000 | $2050.00 | 13,931.0000 | 2,542,300 | 26.41% | 0.20% |
| Feb. 26, 2025 | WHITE MOUNTAINS INSURANCE GROUP LTD | $WTM | Rountree George Manning | Chief Executive Officer | A | Common Shares (restricted) | 1625 | $0.00 | 5,425.0000 | 2,532,200 | 42.76% | 0.06% |
| Jan. 1, 2025 | WHITE MOUNTAINS INSURANCE GROUP LTD | $WTM | Rountree George Manning | Chief Executive Officer | F | Common Shares | 1067 | $1945.06 | 18,929.0000 | 2,532,200 | 5.34% | 0.04% |
| Feb. 22, 2024 | WHITE MOUNTAINS INSURANCE GROUP LTD | $WTM | Rountree George Manning | Chief Executive Officer | A | Common Shares (restricted) | 1800 | $0.00 | 6,500.0000 | 2,527,300 | 38.30% | 0.07% |
| Jan. 1, 2024 | WHITE MOUNTAINS INSURANCE GROUP LTD | $WTM | Rountree George Manning | Chief Executive Officer | F | Common Shares | 1068 | $1505.01 | 17,293.0000 | 2,527,300 | 5.82% | 0.04% |