SEC Form 3 · accession 0000776867-26-000047
WHITE MOUNTAINS INSURANCE GROUP LTD · WTM
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Stephen Klar
Director
Period of report
Aug 26, 2026
Accepted (ET)
Aug 27, 2026 · 3:39 pm EDT
Rule 10b5-1 plan
unknown — predates the checkbox
Issuer CIK
0000776867
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Shares | holding | — | — | — | 0 | D |
Table II — derivative securities
No Table II lines on this filing.