WHITE MOUNTAINS INSURANCE GROUP LTD
An institutional investment manager in Hanover, NH. Its Form 13F for the quarter ended Jun 30, 2026, filed Aug 12, 2026. SEC CIK 776867.
- Reported value$393.6m
- Positions2
Holdings: 2 positions
The filing on sec.govAs filed, largest first. Reported value is what the manager stated for each position at the quarter end, in US dollars; it is filing data, not a price. Weight is the position's share of the total reported value. Changes compare with the 13F for the quarter ended 2026-03-31.
| Issuer | Class | CUSIP | Reported value$m | Weight | Shares | Put or call | Change on the quarter before |
|---|---|---|---|---|---|---|---|
| Mediaalpha IncMAX | CL A | 58450V104 | 224 | 57.0% | 17,856,614 | Unchanged | |
| SPDR S&P 500 ETF TRSPY | TR UNIT | 78462F103 | 169 | 43.0% | 226,500 | Unchanged |
Source: SEC EDGAR, Form 13F-HR, accession 0001104659-26-094905 (on sec.gov). Last ingested by Listed: Oct 22, 2026, 05:26 ET. Listed shows no prices and gives no investment advice.