Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
Common stock purchase or sale:
| Transaction Date | Reported DateTime | Company | Symbol | Insider Relationship | Shares Traded | Average Price | Total Amount | Shares Owned | Filing |
| 2025-12-19 Sale(A) | 2025-12-22 4:51 pm | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | CAMPBELL REID TARLTON Director | 5,000 | $2,050 | $10,250,000 | 10,559 (Indirect Direct) | View |
| 2025-12-19 Sale | 2025-12-22 10:14 am | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | CAMPBELL REID TARLTON Director | 5,000 | $0 | $0 | 10,559 (Indirect Direct) | View |
| 2025-12-19 Sale | 2025-12-22 10:13 am | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Rountree George Manning Chief Executive Officer | 5,000 | $2,050 | $10,250,000 | 19,356 (Indirect Direct) | View |
| 2025-12-16 Sale | 2025-12-16 8:41 pm | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Gelston Philip A Director | 165 | $2,049 | $338,004 | 1,568 (Direct) | View |
Stock options: Exercise, Award, Grant, Conversion
| Transaction Date | Reported DateTime | Exercisable Expiration | Company | Symnbol | Insider Relationship | Shares Traded | Conversion Price | Shares Owned | Filing |
| 2026-05-21 Option Award | 2026-05-22 10:35 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Tanner David Allen Director | 135 | $0 | 2,014 (Direct) | View |
| 2026-05-21 Option Award | 2026-05-22 10:35 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | SHANK SUZANNE F. Director | 135 | $0 | 1,006 (Direct) | View |
| 2026-05-21 Option Award | 2026-05-22 10:34 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Hicks Weston M Director | 190 | $0 | 2,936 (Direct) | View |
| 2026-05-21 Option Award | 2026-05-22 10:34 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Gelston Philip A Director | 135 | $0 | 1,703 (Direct) | View |
| 2026-05-21 Option Award | 2026-05-22 10:33 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Dillon Margaret Director | 135 | $0 | 1,080 (Direct) | View |
| 2026-05-21 Option Award | 2026-05-22 10:32 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Chu John Director | 135 | $0 | 335 (Direct) | View |
Ownership | 2026-05-22 10:32 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Chu John Director | 0 | $0 | 200 (Direct) | View |
| 2026-05-21 Option Award | 2026-05-22 10:32 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | CHOKSI MARY C Director | 135 | $0 | 1,993 (Direct) | View |
| 2026-05-21 Option Award | 2026-05-22 10:31 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Carlson Peter M Director | 135 | $0 | 852 (Direct) | View |
| 2026-05-21 Option Award | 2026-05-22 10:30 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | CAMPBELL REID TARLTON Director | 135 | $0 | 10,694 (Direct) | View |
| 2026-03-19 Gift | 2026-03-20 2:51 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | SEELIG ROBERT LAWRENCE EVP & General Counsel | 50 | $0 | 20,944 (Direct) | View |
| 2026-03-04 Gift | 2026-03-05 10:21 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Tanner David Allen Director | 225 | $0 | 1,879 (Direct) | View |
| 2026-02-25 Option Award | 2026-02-27 11:19 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Caffrey Liam P Chief Executive Officer | 1,500 | $0 | 5,313 (Direct) | View |
| 2026-02-25 Option Award | 2026-02-27 11:18 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Harrison Giles E President | 775 | $0 | 2,677 (Direct) | View |
| 2026-02-25 Option Award | 2026-02-27 11:18 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Hildreth Michaela MD & Chief Accounting Officer | 600 | $0 | 4,336 (Direct) | View |
| 2026-02-25 Option Award | 2026-02-27 11:17 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Papamichael Michael A Chief Financial Officer | 500 | $0 | 1,984 (Direct) | View |
| 2026-02-25 Option Award | 2026-02-27 11:17 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | SEELIG ROBERT LAWRENCE EVP & General Counsel | 775 | $0 | 20,994 (Direct) | View |
| 2026-01-01 Tax Withholding | 2026-01-05 09:09 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Hildreth Michaela MD & Chief Accounting Officer | 274 | $2,078 | 3,736 (Direct) | View |
| 2026-01-01 Tax Withholding | 2026-01-02 9:28 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Papamichael Michael A Chief Financial Officer | 131 | $2,078 | 1,484 (Direct) | View |
Ownership | 2026-01-02 9:26 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Papamichael Michael A Chief Financial Officer | 0 | $0 | 1,615 (Direct) | View |
| 2026-01-01 Tax Withholding | 2026-01-02 6:04 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | SEELIG ROBERT LAWRENCE EVP & General Counsel | 398 | $2,078 | 20,219 (Direct) | View |
| 2026-01-01 Tax Withholding | 2026-01-02 6:02 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Caffrey Liam P Chief Executive Officer | 425 | $2,078 | 3,813 (Direct) | View |
| 2025-12-23 Gift | 2025-12-23 1:55 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Hildreth Michaela MD & Chief Accounting Officer | 60 | $0 | 4,010 (Direct) | View |
| 2025-11-25 Gift | 2025-11-26 10:25 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | CAMPBELL REID TARLTON Director | 50 | $0 | 15,559 (Direct) | View |
| 2025-11-10 Gift | 2025-11-10 3:30 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Tanner David Allen Director | 4 | $0 | 2,104 (Direct) | View |
| 2025-05-22 Option Award | 2025-05-27 09:59 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | SHANK SUZANNE F. Director | 150 | $0 | 871 (Direct) | View |
| 2025-05-22 Option Award | 2025-05-23 7:12 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Yi Steven Director | 150 | $0 | 525 (Direct) | View |
| 2025-05-22 Option Award | 2025-05-23 7:11 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Tanner David Allen Director | 150 | $0 | 2,108 (Direct) | View |
| 2025-05-22 Option Award | 2025-05-23 7:10 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Hicks Weston M Director | 210 | $0 | 2,746 (Direct) | View |
| 2025-05-22 Option Award | 2025-05-23 7:10 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Gelston Philip A Director | 150 | $0 | 1,733 (Direct) | View |
| 2025-05-22 Option Award | 2025-05-23 7:10 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Dillon Margaret Director | 150 | $0 | 945 (Direct) | View |
| 2025-05-22 Option Award | 2025-05-23 7:09 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | CHOKSI MARY C Director | 150 | $0 | 1,858 (Direct) | View |
| 2025-05-22 Option Award | 2025-05-23 7:09 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Carlson Peter M Director | 150 | $0 | 717 (Direct) | View |
| 2025-05-22 Option Award | 2025-05-23 7:08 pm | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | CAMPBELL REID TARLTON Director | 150 | $0 | 15,609 (Direct) | View |
| 2025-02-26 Option Award | 2025-02-28 09:33 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Rountree George Manning Chief Executive Officer | 1,625 | $0 | 24,354 (Direct) | View |
| 2025-02-26 Option Award | 2025-02-28 09:32 am | N/A N/A | WHITE MOUNTAINS INSURANCE GROUP LTD | WTM | Caffrey Liam P EVP& Chief Financial Officer | 1,025 | $0 | 4,236 (Direct) | View |