Margaret Dillon

Companies

• White Mountains Insurance GroupBoard member May 28, 2021 to now¹
• Guidewire SoftwareBoard member Sep 6, 2019 to now²

Holdings

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

Shares held

• Guidewire Software GWRE16,393 shares³$2.8M at $172.09Dec 15, 2025
• WMWhite Mountains Insurance Group WTM1,080 shares⁴$2.3M at $2,166.33May 21, 2026

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

Recent filings

• May 21, 2026Granted 135 shares of White Mountains Insurance Group⁴
• Dec 15, 2025Granted 1,196 shares of Guidewire Software³
• May 22, 2025Granted 150 shares of White Mountains Insurance Group⁵
• Dec 17, 2024Granted 1,211 shares of Guidewire Software⁶
• May 23, 2024Granted 165 shares of White Mountains Insurance Group⁷
• Dec 19, 2023Granted 2,280 shares of Guidewire Software⁸
• May 25, 2023Granted 180 shares of White Mountains Insurance Group⁹
• Dec 20, 2022Granted 3,736 shares of Guidewire Software¹⁰
• May 26, 2022Granted 225 shares of White Mountains Insurance Group¹¹
• Dec 14, 2021Granted 1,691 shares of Guidewire Software¹²
• Dec 14, 2021Granted 1,691 shares of Guidewire Software¹³