Rountree George Manning
SEC insider (Form 3/4/5 filer). CIK 0001457475. Chief Executive Officer at WHITE MOUNTAINS INSURANCE GROUP LTD (WTM). 3 reported Form 4/5 transactions since Sep 2024; latest on Dec 19, 2025. Located in HANOVER, NH.
Companies Rountree George Manning has filed insider reports for
- WHITE MOUNTAINS INSURANCE GROUP LTD (WTM): Director, Officer, Chief Executive Officer
Rountree George Manning
CIK: 0001457475
Transaction Breakdown
Open Market Buys (P)0 (0.0%)
High conviction signal
Open Market Sales (S)1 (33.3%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)1 (33.3%)
Compensation grants
Other (G, F, J, C, D, …)1 (33.3%)
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
WTM
WHITE MOUNTAINS INSURANCE GROUP LTD
DirectorOfficer
Discretionary Trading P&L
Holdings
Transaction History (3 total)
- Dec 19, 2025WTM
WHITE MOUNTAINS INSURANCE GROUP LTD
SaleDirect5K shares at avg. $2050.00$10.3M - Feb 26, 2025WTM
WHITE MOUNTAINS INSURANCE GROUP LTD
AwardDirect1.6K shares- - Jan 1, 2025WTM
WHITE MOUNTAINS INSURANCE GROUP LTD
Tax PaymentDirect1.1K shares at avg. $1945.06$2.1M
1-3 of 3 transactions