Form 4 holding
Director
WHITE MOUNTAINS INSURANCE GROUP LTD
- Security class
- Common Shares
- Shares / value
- 2,012
- Estimated value
- $4,171,660
- Report date
- 31 Aug 2026
- Price
- $2073.39
- Ownership
- Direct
David A. Tanner - Director at WHITE MOUNTAINS INSURANCE GROUP LTD
Issuer-level insider activity
- Role
- Director
- Issuer ticker
- WTM on NYSE
- Entity type
- Individual
- Source filing history
- Open source filing history
Identity
Names, identifiers, and filing context for this profile.
1 identity field
Source evidence
Original filing metadata and source links for verification.
1 source field
No buys or sells have been reported by David A. Tanner since 12 Oct 2025
Reported holdings for David A. Tanner in WHITE MOUNTAINS INSURANCE GROUP LTD
Transaction history for David A. Tanner in WHITE MOUNTAINS INSURANCE GROUP LTD
| Sym | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares after | Date | Ownership |
|---|
* marks a reported price that did not pass the local price check.