WTM Insider Trading Activity and SEC Form 4 Filings
WTM insider trading summary
Over the past 12 months, insiders at White Mountains Insurance Group Ltd (WTM) reported 3 sales worth $10.6M by 3 insiders and no open-market purchases on SEC Form 4. Net insider selling was $10.6M.
Latest WTM insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Dec 19, 2025 | Reid Tarlton Campbell | Director | Sell | $0 (5,000 @ $0.00) |
| Dec 19, 2025 | George Manning Rountree | Chief Executive Officer | Sell | $10.3M (5,000 @ $2050.00) |
| Dec 16, 2025 | Philip A Gelston | Director | Sell | $338K (165 @ $2048.51) |
| Nov 17, 2023 | Weston M Hicks | Director | Buy | $353K (238 @ $1484.96) |
| Nov 17, 2023 | Weston M Hicks | Director | Buy | $177K (120 @ $1476.74) |
| Nov 17, 2023 | Weston M Hicks | Director | Buy | $857K (579 @ $1479.88) |
| Nov 17, 2023 | Weston M Hicks | Director | Buy | $16K (11 @ $1483.43) |
| Nov 17, 2023 | Weston M Hicks | Director | Buy | $77K (52 @ $1476.15) |
| Dec 22, 2022 | Michaela Hildreth | MD & Chief Accounting Officer | Sell | $137K (100 @ $1371.84) |
| Sep 20, 2022 | Peter M Carlson | Director | Sell | $280K (200 @ $1400.00) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.