Reid Tarlton Campbell serves as Executive at WHITE MOUNTAINS INSURANCE GROUP LTD, where they oversee executive responsibilities. Since joining the company, Reid Tarlton Campbell has executed 69 insider transactions totaling $14.7M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 19, 2025 involved selling 5,000 shares valued at $0.
Reid Tarlton Campbell currently holds 10,440 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, Reid Tarlton Campbell has been a net seller of WTM stock. They have purchased $0 and sold $14.7M worth of shares.
Reid Tarlton Campbell's most recent insider trade was on Dec 19, 2025, when they sold 5,000 shares at $0.00 per share.
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| $2050.00 |
| Discretionary |
| Nov 25, 2025 | WTM | $0 | Gift | 50 | $N/A | Discretionary |
| May 23, 2024 | WTM | $0 | Award | 165 | $N/A | Discretionary |
| Mar 21, 2024 | WTM | $0 | Gift | 55 | $N/A | Discretionary |
| Feb 22, 2024 | WTM | $0 | Award | 45 | $N/A | Discretionary |
| Jan 1, 2024 | WTM | $1.1M | Payment | 710 | $1505.01 | Discretionary |
| Jan 1, 2023 | WTM | $1.0M | Payment | 710 | $1414.33 | Discretionary |
| Jun 1, 2022 | WTM | $0 | Gift | 100 | $N/A | Discretionary |
| Jan 1, 2022 | WTM | $811.1K | Payment | 800 | $1013.90 | Discretionary |
| Feb 25, 2021 | WTM | $0 | Award | 1,800 | $N/A | Discretionary |
| Jan 1, 2021 | WTM | $930.6K | Payment | 930 | $1000.66 | Discretionary |
| Dec 8, 2020 | WTM | $0 | Gift | 30 | $N/A | Discretionary |
| Feb 27, 2020 | WTM | $0 | Award | 1,800 | $N/A | Discretionary |
| Jan 1, 2020 | WTM | $1.2M | Payment | 1,045 | $1115.51 | Discretionary |
| Sep 25, 2019 | WTM | $0 | Gift | 90 | $N/A | Discretionary |
| Feb 28, 2019 | WTM | $0 | Award | 2,000 | $N/A | Discretionary |
| Jan 1, 2019 | WTM | $900.6K | Payment | 1,050 | $857.69 | Discretionary |
| Mar 29, 2018 | WTM | $0 | Gift | 50 | $N/A | Discretionary |
| Mar 1, 2018 | WTM | $0 | Award | 2,000 | $N/A | Discretionary |
| Jan 1, 2018 | WTM | $1.1M | Payment | 1,275 | $851.28 | Discretionary |
| Dec 26, 2017 | WTM | $0 | Gift | 100 | $N/A | Discretionary |
| May 25, 2017 | WTM | $0 | Award | 750 | $N/A | Discretionary |
| Mar 1, 2017 | WTM | $0 | Award | 2,000 | $N/A | Discretionary |
| Jan 1, 2017 | WTM | $919.7K | Payment | 1,100 | $836.05 | Discretionary |
| Aug 10, 2016 | WTM | $0 | Gift | 75 | $N/A | Discretionary |
| Feb 25, 2016 | WTM | $0 | Award | 2,000 | $N/A | Discretionary |
| Jan 1, 2016 | WTM | $799.5K | Payment | 1,100 | $726.81 | Discretionary |
| Sep 17, 2015 | WTM | $1.4M | Disposition | 1,900 | $761.50 | Discretionary |
| Feb 25, 2015 | WTM | $0 | Award | 2,500 | $N/A | Discretionary |