Trade Summary

1 week ago, Rountree George Manning, serving as CEO at White Mountains Insurance Group Ltd (WTM), sold 5,000 shares at $2,050.00 per share, for a total transaction value of $10,250,000.00. Following this transaction, Rountree George Manning now holds 19,356 shares of WTM.

This sale represents a 21.00% decrease in Rountree George Manning's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Friday, December 19, 2025 and publicly disclosed via SEC Form 4 filing on Monday, December 22, 2025, 3 days after the trade was made.

White Mountains Insurance Group Ltd operates in the FINANCIAL SERVICES sector, specifically within the INSURANCE - PROPERTY & CASUALTY industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.