Company profile
White Mountains Insurance Group Ltd Insider Trading
WTMEvery SEC Form 4 insider trading filing for White Mountains Insurance Group Ltd (WTM) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- NYSE
- Sector
- Fire, Marine & Casualty Insurance
- CIK
- 0000776867
- Filings
- 77
- Insiders
- 16
- Last filing
- 2026-05-21
Activity summary
No insider transactions in the last 30 days. The most recent was on May 21, 2026, when Campbell Reid Tarlton bought 135 shares. 77 filings from 16 insiders are on record below.
Three year balance
Buy and sell value by quarter, Q2 23 to Q2 26. White Mountains Insurance Group Ltd insiders are net sellers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $20.8M.
No insider activity recorded for WTM in the last 90 days.
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 | — | — |
| May 21, 2026 | Tanner David Allen | WTM | Award | 135 | — | — |
| May 21, 2026 | Shank Suzanne F. | WTM | Award | 135 | — | — |
| May 21, 2026 | Hicks Weston M | WTM | Award | 190 | — | — |
| May 21, 2026 | Gelston Philip A | WTM | Award | 135 | — | — |
45 more transactions hidden
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By total value filed.