SEC Form 4 · accession 0000776867-26-000051
WHITE MOUNTAINS INSURANCE GROUP LTD · WTM
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
David Allen Tanner
Director
Period of report
Aug 31, 2026
Accepted (ET)
Aug 31, 2026 · 5:04 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0000776867
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Shares | Aug 31, 2026 | G | 2 | $0.00 | D | 2,012 | D |
Table II — derivative securities
No Table II lines on this filing.