Reid Tarlton Campbell, Director at WHITE MOUNTAINS INSURANCE GROUP LTD (WTM), sold 5,000 shares at $2050.00 ($10.3M) on 2025-12-19, disclosed to the SEC on 2025-12-22.
Seasonal sale ($10.2M) by Director — this insider has traded WTM in December in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
| Filing → |
| WTM | SELL | 2012-12-10 | $467K | — | Filing → |
| WTM | SELL | 2011-12-28 | $643K | — | Filing → |
| WTM | SELL | 2011-12-05 | $213K | — | Filing → |