Terminal · Institutions
Every 13F-reported equity position this quarter, with its quarter-over-quarter change — each row traces back to the SEC filing.
Every 13F-reported equity position this quarter, with its quarter-over-quarter change — each row traces back to the SEC filing.
WHITE MOUNTAINS INSURANCE GROUP LTD (CIK 776867) reported $313.4M across 2 reported positions in its SEC 13F filing for 2026-03-31. Largest positions: MAX ($166.1M, 52.99%), SPY ($147.3M, 47.01%). Source: SEC Form 13F.
| Rank | Ticker | Company | Value | % Portfolio | Shares | Action |
|---|---|---|---|---|---|---|
| 1 | MAX | MEDIAALPHA INC | $166.1M | 52.99% | 17.9M | Hold |
| 2 | SPY | SPDR S&P 500 ETF TR | $147.3M | 47.01% | 226,500 | Added |
Source: SEC Form 13F filings · as of 2026-03-31