George Manning Rountree White Mountains Insurance Group LTD (WTM) insider trading activity

WTM Quotes by TradingView

George Manning Rountree is Chief Executive Officer of WHITE MOUNTAINS INSURANCE GROUP LTD. Currently has a direct ownership of 13,809 shares of WTM, which is worth approximately $26.6 Million. The most recent transaction as insider was on Dec 19, 2025, when has been sold 5,000 shares (Common Shares) at a price of $2050.0 per share, resulting in proceeds of $10,250,000. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 13.8K
154.54% 3M change
26.58% 12M change
Total Value Held $26.6 Million

George Manning Rountree Transaction History

Date Transaction Value Shares Traded Shares Held Form
Dec 19 2025
SELL
Open market or private sale
$10,250,000 $2050.0 p/Share
5,000 Reduced 26.58%
13,809 Common Shares
Feb 26 2025
BUY
Grant, award, or other acquisition
-
1,625 Added 23.05%
5,425 Common Shares (restric...
Jan 01 2025
SELL
Payment of exercise price or tax liability
$2,075,379 $1945.06 p/Share
1,067 Reduced 5.37%
18,809 Common Shares
Feb 22 2024
BUY
Grant, award, or other acquisition
-
1,800 Added 21.69%
6,500 Common Shares (restric...
Jan 01 2024
SELL
Payment of exercise price or tax liability
$1,607,350 $1505.01 p/Share
1,068 Reduced 5.85%
17,176 Common Shares
Feb 22 2023
BUY
Grant, award, or other acquisition
-
2,000 Added 21.28%
7,400 Common Shares (restric...
Jan 01 2023
SELL
Payment of exercise price or tax liability
$1,510,504 $1414.33 p/Share
1,068 Reduced 6.43%
15,544 Common Shares
Feb 25 2022
BUY
Grant, award, or other acquisition
-
2,700 Added 25.0%
8,100 Common Shares (restric...
Jan 01 2022
SELL
Payment of exercise price or tax liability
$1,203,499 $1013.9 p/Share
1,187 Reduced 7.86%
13,912 Common Shares
Feb 25 2021
BUY
Grant, award, or other acquisition
-
2,700 Added 24.32%
8,400 Common Shares (restric...
Jan 01 2021
SELL
Payment of exercise price or tax liability
$1,187,783 $1000.66 p/Share
1,187 Reduced 8.93%
12,099 Common Shares
Feb 27 2020
BUY
Grant, award, or other acquisition
-
2,700 Added 23.68%
8,700 Common Shares (restric...
Jan 01 2020
SELL
Payment of exercise price or tax liability
$1,322,995 $1115.51 p/Share
1,186 Reduced 10.34%
10,286 Common Shares
Feb 28 2019
BUY
Grant, award, or other acquisition
-
3,000 Added 25.0%
9,000 Common Shares (restric...
Jan 01 2019
SELL
Payment of exercise price or tax liability
$1,018,936 $857.69 p/Share
1,188 Reduced 12.3%
8,472 Common Shares
Mar 01 2018
BUY
Grant, award, or other acquisition
-
3,200 Added 26.23%
9,000 Common Shares (restric...
Jan 01 2018
SELL
Payment of exercise price or tax liability
$1,010,469 $851.28 p/Share
1,187 Reduced 15.13%
6,660 Common Shares
GMR

George Manning Rountree

Chief Executive Officer
Hanover, NH

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