Rountree George Manning - 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 19, 2025, Rountree George Manning's relationship to WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) is Director,Officer (Chief Executive Officer), and currently has 13,809 shares of Common Shares, and 5,425 shares of Common Shares (restricted).

The charts below show 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.

Rountree George Manning - Insider Non-Derivative Transactions of WTM Common Shares

Rountree George Manning - Insider Non-Derivative Transactions of WTM Common Shares (restricted)

Rountree George Manning - Insider Non-Derivative Transactions at WTM

Items per page:

0 of 0

Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Dec 20, 2025	Sell -- (Common Shares)	5000	2050	13809
Feb 27, 2025	Acquisition -- (Common Shares (restricted))	1625	0	5425
Jan 2, 2025	F -- (Common Shares)	1067	1945.06	18809
Feb 23, 2024	Acquisition -- (Common Shares (restricted))	1800	0	6500
Jan 2, 2024	F -- (Common Shares)	1068	1505.01	17176
Feb 23, 2023	Acquisition -- (Common Shares (restricted))	2000	0	7400
Jan 2, 2023	F -- (Common Shares)	1068	1414.33	15544