WHITE MOUNTAINS INSURANCE GROUP LTD
Institutional investors holding WTM
| Investor | Weight | Quarter |
|---|---|---|
| Thomas Gayner | 3.89% | 2007Q3 |
| Mason Hawkins | 2.04% | 2026Q1 |
| Chuck Akre | 0.16% | 2006Q1 |
| Bruce Berkowitz | 0.02% | 2009Q4 |
| Third Avenue Management | 0.02% | 2004Q3 |
| Christopher Davis | 0.00% | 2008Q4 |
| Dodge & Cox | 0.00% | 2022Q2 |
Congressional data coming soon
4
Total trades
$0
Volume
4
Buys
0
Sells
Last trade: May 21, 2026
| Date | Insider | Type | Value |
|---|---|---|---|
| May 21, 2026 | Reid Tarlton Campbell | Buy | – |
| May 21, 2026 | Mary C Choksi | Buy | – |
Congressional trade data is being sourced and will appear here shortly.
| May 21, 2026 |
| Peter M Carlson |
| Buy |
| – |
| May 21, 2026 | John Chu | Buy | – |