Reid Tarlton Campbell

Companies

• White Mountains Insurance GroupBoard member Feb 23, 2024 to now¹
• White Mountains Insurance GroupPresident Jun 1, 2007 to Jan 2, 2024²
• White Mountains Insurance GroupChief financial officer May 26, 2017 to Jan 4, 2022³
• White Mountains Insurance GroupManaging Director Feb 25, 2011 to Mar 3, 2017⁴

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• WMWhite Mountains Insurance Group WTM10,694 shares⁵$23.2M at $2,166.33May 22, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• May 21, 2026Granted 135 shares of White Mountains Insurance Group⁵
• Dec 19, 2025Sold 5,000 shares at $2,050.00 of White Mountains Insurance Group⁶
• Dec 19, 2025Sold 5,000 shares of White Mountains Insurance Group⁷
• Nov 25, 2025Gift 50 shares of White Mountains Insurance Group⁸
• May 22, 2025Granted 150 shares of White Mountains Insurance Group⁹
• May 23, 2024Granted 165 shares of White Mountains Insurance Group¹⁰
• Mar 21, 2024Gift 55 shares of White Mountains Insurance Group¹¹
• Feb 22, 2024Granted 45 shares of White Mountains Insurance Group¹²
• Jan 1, 2024Shares withheld for tax 710 shares at $1,505.01 of White Mountains Insurance Group¹³
• Jan 1, 2023Shares withheld for tax 710 shares at $1,414.33 of White Mountains Insurance Group¹⁴
• Jun 1, 2022Gift 100 shares of White Mountains Insurance Group¹⁵
• Jan 1, 2022Shares withheld for tax 800 shares at $1,013.90 of White Mountains Insurance Group¹⁶