George Manning Rountree is CEO at WHITE MOUNTAINS INSURANCE GROUP LTD (WTM). They have made 3 open-market trades across 1 company since 2011, most recently 2025-12-19.
CIK 0001457475
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 3 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| WTM | 13,809 | $29.8M |
Shares reported on the most recent Form 4, priced at the 2025-12-22 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.