Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| WHITE MOUNTAINS INSURANCE GROUP LTDWTM · Entity 3904 | President | February 25, 2026 | February 27, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
WHITE MOUNTAINS INSURANCE GROUP LTD
Report date February 25, 2026 · Filed February 27, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common Shares (restricted)SEC Table I · non-derivative | Direct | 2,675 |
Reported balance
After 2026-02-25 transaction · row 1
1 source rowRow 1 · 2026-02-25 · Grant · Acquired 775 · Balance 2,675 F1: On February 25, 2026, the Reporting Person received a restricted share award of 775 Common Shares, which vests on January 1, 2029. |
| Common SharesSEC Table I · non-derivative | Indirectby White Mountains Retirement Plan | 2 |
Reported balance
Holding disclosure · report date 2026-02-25 · row 2
Holding and transaction disclosures are not merged.
1 source rowRow 2 · Balance 2 F2: Reflects accumulation of 2 Common Shares in Reporting Person's Company Retirement account since his last filed report. The information in this report is based on a plan report dated as of February 25, 2026. |
Filing footnotes · ownership attribution and instrument terms
F1: On February 25, 2026, the Reporting Person received a restricted share award of 775 Common Shares, which vests on January 1, 2029.
F2: Reflects accumulation of 2 Common Shares in Reporting Person's Company Retirement account since his last filed report. The information in this report is based on a plan report dated as of February 25, 2026.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| February 25, 2026 Filed Feb 27, 2026 16:18 UTC | WHITE MOUNTAINS INSURANCE GROUP LTD WTM · Entity 3904 | GrantCommon Shares (restricted) | 775 | $0.00 | $0.00 |
DisclosureSEC source: 0000776867-26-000020 · form4.xml · nonDerivative · entry 1 Harrison Giles E · CIK 0002019288 · President 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 2,675 F1 · shares: On February 25, 2026, the Reporting Person received a restricted share award of 775 Common Shares, which vests on January 1, 2029. Read SEC document |
| February 26, 2025 Filed Feb 28, 2025 14:31 UTC | WHITE MOUNTAINS INSURANCE GROUP LTD WTM · Entity 3904 | GrantCommon Shares (restricted) | 900 | $0.00 | $0.00 |
DisclosureSEC source: 0001062993-25-003864 · form4.xml · nonDerivative · entry 1 Harrison Giles E · CIK 0002019288 · EVP & Chief Strategy Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,900 F1 · shares: On February 26, 2025, the Reporting Person received a restricted share award of 900 Common Shares, which vests on January 1, 2028. Read SEC document |
| June 10, 2024 Filed Jun 10, 2024 13:01 UTC | WHITE MOUNTAINS INSURANCE GROUP LTD WTM · Entity 3904 | GrantCommon Shares (restricted) | 1,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001062993-24-012249 · form4.xml · nonDerivative · entry 1 Harrison Giles E · CIK 0002019288 · EVP & Chief Strategy Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,000 F1 · shares: On June 10, 2024, the Reporting Person received a restricted share award of 1,000 Common Shares, which vests on January 1, 2027. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.