George Manning Rountree
Chief Executive Officer at White Mountains Insurance Group Ltd.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: White Mountains Insurance Group Ltd., 3 years.
White Mountains Insurance Group Ltd.
Director · Chief Executive Officer
Chief executive roles
White Mountains Insurance Group Ltd.
· Chief Executive Officer
Dates unknown
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Feb 26, 2025 | White Mountains Insurance Group Ltd. | Grant or award | +1,625 | — | — |
| Feb 22, 2024 | White Mountains Insurance Group Ltd. | Grant or award | +1,800 | — | — |
| Jan 1, 2024 | White Mountains Insurance Group Ltd. | Shares withheld for tax | −1,068 | $1,505.01 | $1,607,351 |
| Feb 22, 2023 | White Mountains Insurance Group Ltd. | Grant or award | +2,000 | — | — |
| Jan 1, 2023 | White Mountains Insurance Group Ltd. | Shares withheld for tax | −1,068 | $1,414.33 | $1,510,504 |
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