White Mountains Insurance Group Ltd
WTM- Exchange
- NYSE
- Industry
- Fire, Marine & Casualty Insurance
- SEC CIK
- 0000776867
No open-market purchases or sales by White Mountains Insurance Group Ltd insiders were filed in the last 90 days; 356 institutions reported holding it in 13F filings for Q2 2026, worth $4.57B in total; Southeastern Asset Management (Longleaf) is the only superinvestor holding it.
Politicians who traded WTM
Since 2020, newest trade first. Shares and options by default, including trades reported under an earlier ticker.
- Trades
- 1
- Filings
- 1
- Politicians
- 1
- Buys / sells
- 1 / 0
- Estimated volume
- $75.0K
- Sum of range midpoints
| Politician | Trades | Buys / sells | Est. volume | Last traded | Last filed |
|---|---|---|---|---|---|
 J. French Hill House · AR | 1 | 1 / 0 | $75.0K | Jun 23, 2025 | Jul 24, 2025 |
Trades
Reported trades in White Mountains Insurance Group Ltd, newest filings first.
Source: U.S. House Clerk and Senate Office of Public Records (eFD). Amounts are the ranges filers report. Profiles, committees and photos: the unitedstates project (public domain). District maps: U.S. Census Bureau.