George Manning Rountree

Insider Reports History

Reporting-owner location: Hanover, NH
Latest reporting-owner signature: Wesley C. Bell, by Power of Attorney
Source: Latest parsed Forms 3/4/5 signature
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for George Manning Rountree

Form 4 holding Chief Executive Officer, Director

WHITE MOUNTAINS INSURANCE GROUP LTD

Security class: Common Shares
Shares / value: 13,809
Estimated value: $28,308,450
Report date: 19 Dec 2025
Price: $2050.00
Ownership: Direct

Form 4 holding Chief Executive Officer, Director

WHITE MOUNTAINS INSURANCE GROUP LTD

Security class: Common Shares
Shares / value: 122
Estimated value: $229,556
Report date: 19 Dec 2025
Price: $1881.61
Ownership: by 401(k)

Form 4 holding Chief Executive Officer, Director

WHITE MOUNTAINS INSURANCE GROUP LTD

Security class: Common Shares (restricted)
Shares / value: 5,425
Estimated value
Report date: 19 Dec 2025
Price
Ownership: Direct

Insider Reports Filed by George Manning Rountree

4 WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Report period: 19 Dec 2025
Transactions: 1
Transaction value: -$10,250,000
Accepted by SEC: 22 Dec 2025, 10:13
Role: Chief Executive Officer, Director
Next action: Open filing details

4 WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Report period: 26 Feb 2025
Transactions: 1
Transaction value: $0
Accepted by SEC: 28 Feb 2025, 09:33
Role: Chief Executive Officer, Director
Next action: Open filing details

4 WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Report period: 01 Jan 2025
Transactions: 1
Transaction value: -$2,075,379
Accepted by SEC: 03 Jan 2025, 09:23
Role: Chief Executive Officer, Director
Next action: Open filing details

4 WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Report period: 22 Feb 2024
Transactions: 1
Transaction value: $0
Accepted by SEC: 23 Feb 2024, 21:28
Role: Chief Executive Officer, Director
Next action: Open filing details

4 WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Report period: 01 Jan 2024
Transactions: 1
Transaction value: -$1,607,351
Accepted by SEC: 02 Jan 2024, 12:01
Role: Chief Executive Officer, Director
Next action: Open filing details

4 WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Report period: 22 Feb 2023
Transactions: 1
Transaction value: $0
Accepted by SEC: 24 Feb 2023, 08:01
Role: Chief Executive Officer, Director
Next action: Open filing details

4 WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Report period: 01 Jan 2023
Transactions: 1
Transaction value: -$1,510,504
Accepted by SEC: 03 Jan 2023, 13:14
Role: Chief Executive Officer, Director
Next action: Open filing details

4 WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Report period: 25 Feb 2022
Transactions: 1
Transaction value: $0
Accepted by SEC: 28 Feb 2022, 12:24
Role: Chief Executive Officer, Director
Next action: Open filing details

4 WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Report period: 01 Jan 2022
Transactions: 1
Transaction value: -$1,203,499
Accepted by SEC: 04 Jan 2022, 19:59
Role: Chief Executive Officer, Director
Next action: Open filing details

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