GR
Insider
George Manning Rountree
Chief Executive OfficerGeorge Manning Rountree (Chief Executive Officer) filed 1 Form 4 report in the trailing twelve months (0 purchases, 1 sale), most often in WTM. The largest single filing was $10.2M of WTM (5,000 sh × $2,050.00, as filed), executed Dec 19 2025. Data as of Nov 8 2026.
Add to watchlistReturn, ttmiAverage return per filing, trailing twelve months
–
no purchases on file
Delay-adjustediThe same average, entered at disclosure dates
–
returns measure stock purchases only
Filings, ttm
1
0 buys · 1 sells
Median delay
–
measured on stock purchases
Volume, ttmiDollar value disclosed in the trailing twelve months
$10.2M
shares × price, as filed
Last traded
Dec 19 2025
Filed Dec 22 2025
Volume by month
Buys $0
Sells $10.2M
Shares × price, as filed · by filing month · past 24 months
Most traded names
WTM
WTM
0 buys · 1 sell
1 filing
Recent filings
WTMSALE
WHITE MOUNTAINS INSURANCE GROUP LTD
View filing →
$10.2M5,000 sh × $2,050.00
Exec Dec 19 2025
Filed Dec 22 2025 · 5:30 PM ET