Form 4: Director Gifts WTM Shares Under 10b5-1 Plan

White Mountains Insurance Group Director David Allen Tanner gifted 4 common shares under a pre-arranged 10b5-1 plan, retaining 2,104 shares.

Summary

• Director David Allen Tanner of White Mountains Insurance Group Ltd. (WTM) reported a change in beneficial ownership.
• The transaction involved the disposition of 4 common shares as a gift.
• The transaction occurred on November 10, 2025.
• The disposition was made pursuant to a Rule 10b5-1(c) plan, indicating a pre-arranged trading strategy.
• Following this transaction, Mr. Tanner directly owns 2,104 common shares.

Sentiment

Score: 5

Explanation: Neutral. This is a routine insider gift transaction under a pre-arranged plan, involving a negligible number of shares, and has minimal impact on overall share structure or company operations.

Positives

• The transaction was executed under a Rule 10b5-1(c) plan, demonstrating adherence to pre-arranged trading guidelines and enhancing transparency.

Negatives

• Director David Allen Tanner disposed of 4 common shares, resulting in a minor reduction of his direct beneficial ownership.

Future Outlook

No future outlook or guidance is provided in this insider transaction report.

Industry Context

This filing reports a routine insider transaction and does not provide information directly related to broader industry trends or competitive landscape.

Corporate Governance

Stakeholder Impact

• Shareholders: A minor reduction in a director's direct beneficial ownership, but the transaction is very small (4 shares) and pre-planned, suggesting negligible impact on shareholder value or confidence.

Key Dates

Keywords

White Mountains Insurance Group, WTM, Form 4, Insider Transaction, Director, Share Disposition, Gift, 10b5-1 Plan, Beneficial Ownership