Philip A. Gelston is Director at WHITE MOUNTAINS INSURANCE GROUP LTD (WTM). They have made 1 open-market trade across 1 company since 2025, most recently 2026-05-21.
CIK 0001733327
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 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| WTM | 1,703 | $3.7M |
Shares reported on the most recent Form 4, priced at the 2026-05-22 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| WTM | SELL | 2025-12-16 | 2025-12-16 | $2048.51 | $676K | +1.3% | +0.6% | +7.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.