Trade Summary

1 week ago, Campbell Reid Tarlton, serving as Dir 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, Campbell Reid Tarlton now holds 10,559 shares of WTM.

This sale represents a 32.00% decrease in Campbell Reid Tarlton'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.