Gelston Philip A - Insider Non-Derivative Transactions at WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Dec 16, 2025, Gelston Philip A's relationship to WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) is Director, and currently has 1,568 shares of Common Shares.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other WTM insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Gelston Philip A - Insider Non-Derivative Transactions of WTM Common Shares

Gelston Philip A - Insider Non-Derivative Transactions at WTM

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Dec 17, 2025	Sell -- (Common Shares)	165	2048.51	1568
May 23, 2025	Acquisition -- (Common Shares)	150	0	1733
May 24, 2024	Acquisition -- (Common Shares)	165	0	1583
May 26, 2023	Acquisition -- (Common Shares)	180	0	1418