Philip A. Gelston serves as Executive at WHITE MOUNTAINS INSURANCE GROUP LTD, where they oversee executive responsibilities. Since joining the company, Philip A. Gelston has executed 9 insider transactions totaling $338.0K, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 16, 2025 involved selling 165 shares valued at $338.0K.
Philip A. Gelston currently holds 1,568 shares of WHITE MOUNTAINS INSURANCE GROUP LTD (WTM), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Philip A. Gelston has been a net seller of WTM stock. They have purchased $0 and sold $338.0K worth of shares.
Philip A. Gelston's most recent insider trade was on Dec 16, 2025, when they sold 165 shares at $2048.51 per share.
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| $N/A |
| Discretionary |
| May 25, 2023 | WTM | $0 | Award | 180 | $N/A | Discretionary |
| May 26, 2022 | WTM | $0 | Award | 225 | $N/A | Discretionary |
| May 27, 2021 | WTM | $0 | Award | 225 | $N/A | Discretionary |
| May 21, 2020 | WTM | $0 | Award | 225 | $N/A | Discretionary |
| May 23, 2019 | WTM | $0 | Award | 250 | $N/A | Discretionary |
| May 24, 2018 | WTM | $0 | Award | 250 | $N/A | Discretionary |
| Mar 1, 2018 | WTM | $0 | Award | 63 | $N/A | Discretionary |