{"transactions":[{"id":878680,"issuer":{"id":3904,"kind":"organization","name":"WHITE MOUNTAINS INSURANCE GROUP LTD"},"owners":[{"id":64356,"kind":"person","name":"Papamichael Michael A","position":1,"cik":"0002090784","reported_name":"Papamichael Michael A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Shares (Restricted)","published_at":"2026-02-27T16:17:59.000Z","date":"2026-02-25","kind":"grant","planned":false,"acquired":true,"shares":500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On February 25, 2026, the Reporting Person received a restricted share award of 500 Common Shares, which vests on January 1, 2029."}],"balance_after":1200,"source":{"system":"sec-edgar","filing":"0000776867-26-000018","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/776867/000077686726000018/form4.xml","form_type":"4"}},{"id":955979,"issuer":{"id":3904,"kind":"organization","name":"WHITE MOUNTAINS INSURANCE GROUP LTD"},"owners":[{"id":64356,"kind":"person","name":"Papamichael Michael A","position":1,"cik":"0002090784","reported_name":"Papamichael Michael A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Shares","published_at":"2026-01-03T02:28:22.000Z","date":"2026-01-01","kind":"tax_withholding","planned":false,"acquired":false,"shares":131,"price":2078.03,"value":272221.93,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On January 1, 2026, 400 restricted Common Shares became unrestricted. 131 of the Common Shares were withheld by the Company to satisfy the Reporting Person's tax obligations."}],"balance_after":772,"source":{"system":"sec-edgar","filing":"0000776867-26-000009","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/776867/000077686726000009/form4.xml","form_type":"4"}}]}