// company-profile
White Mountains Insurance Group Ltd
WTMExchangeNYSESectorFire, Marine & Casualty InsuranceInc.D0Filings77Insiders16
// api This White Mountains Insurance Group Ltd insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, White Mountains Insurance Group Ltd insiders bought $0 across 9 transactions with no open-market sales.
- Most active insider: CAMPBELL REID TARLTON with 1 transaction totaling $0.
Activity skews bullish — buys outpace sales.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 21, 2026 | CAMPBELL REID TARLTON | WTM | Award | 135 | $0.00 | $0K |
| May 21, 2026 | Carlson Peter M | WTM | Award | 135 | $0.00 | $0K |
| May 21, 2026 | Chu John | WTM | Award | 135 | $0.00 | $0K |
| May 21, 2026 | Dillon Margaret | WTM | Award | 135 | $0.00 | $0K |
| May 21, 2026 | Gelston Philip A | WTM | Award | 135 | $0.00 | $0K |
45 more transactions hidden
Free account · No credit card required
Building something? Get API access →
Popular companies on Form4API
Browse insider trading activity for other actively-filed companies.