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White Mountains Insurance Group Ltd (NYSE:WTM)
Bermuda · Delayed Price · Currency is USD
Financial Services · Insurance - Property & Casualty
2231.53+6.29 (+0.28%)
Market cap
$5.33B
Website
Insider Score
––Not scored
WTM Insider Score
Insiders here have filed 2 Form 4s in the last 90 days, but all of them are share awards, grants or other non-market transactions. Those are compensation, not a decision to buy, so they are not scored.
WTM Stock Insider Trading Activity
WTM stock’s insider trading shows no open-market insider trades by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Tanner David Allen Director | Gift | 2 | — | — | 0.1% | 2,012 | Aug 31, 2026 | — | Form 4 |
| Klar Stephen Director | Award | 113 | — | — | New | 113 | Aug 26, 2026 | — | Form 4 |
| CHOKSI MARY C Director | Award | 135 | — | — | 7.3% | 1,993 | May 21, 2026 | — | Form 4 |
| Tanner David Allen Director | Award | 135 | — | — | 7.2% | 2,014 | May 21, 2026 | — | Form 4 |
| SHANK SUZANNE F. Director | Award | 135 | — | — | 15.5% | 1,006 | May 21, 2026 | — | Form 4 |
| Hicks Weston M Director | Award | 190 | — | — | 6.9% | 2,936 | May 21, 2026 | — | Form 4 |
| Gelston Philip A Director | Award | 135 | — | — | 8.6% | 1,703 | May 21, 2026 | — | Form 4 |
| Dillon Margaret Director | Award | 135 | — | — | 14.3% | 1,080 | May 21, 2026 | — | Form 4 |
| Chu John Director | Award | 135 | — | — | 67.5% | 335 | May 21, 2026 | — | Form 4 |
| Carlson Peter M Director | Award | 135 | — | — | 18.8% | 852 | May 21, 2026 | — | Form 4 |
| CAMPBELL REID TARLTON Director | Award | 135 | — | — | 1.3% | 10,575 | May 21, 2026 | — | Form 4 |
| SEELIG ROBERT LAWRENCE Other | Gift | 50 | — | — | 0.3% | 17,857 | Mar 19, 2026 | — | Form 4 |
| Tanner David Allen Director | Gift | 225 | — | — | 10.7% | 1,879 | Mar 4, 2026 | — | Form 4 |
| Harrison Giles E Other | Award | 775 | — | — | 40.8% | 2,675 | Feb 25, 2026 | — | Form 4 |
| Hildreth Michaela Other | Award | 600 | — | — | 49.0% | 1,825 | Feb 25, 2026 | — | Form 4 |
| Papamichael Michael A CFO | Award | 500 | — | — | 71.4% | 1,200 | Feb 25, 2026 | — | Form 4 |
| Caffrey Liam P CEO | Award | 1,500 | — | — | 69.8% | 3,650 | Feb 25, 2026 | — | Form 4 |
| SEELIG ROBERT LAWRENCE Other | Award | 775 | — | — | 44.9% | 2,500 | Feb 25, 2026 | — | Form 4 |
| Caffrey Liam P CEO | Tax withheld | 425 | $2078.03 | $883.16K | 20.4% | 1,655 | Jan 1, 2026 | — | Form 4 |
| Hildreth Michaela Other | Tax withheld | 274 | $2078.03 | $569.38K | 9.9% | 2,491 | Jan 1, 2026 | — | Form 4 |
| SEELIG ROBERT LAWRENCE Other | Tax withheld | 398 | $2078.03 | $827.06K | 2.2% | 17,907 | Jan 1, 2026 | — | Form 4 |
| Papamichael Michael A CFO | Tax withheld | 131 | $2078.03 | $272.22K | 14.5% | 772 | Jan 1, 2026 | — | Form 4 |
| Hildreth Michaela Other | Gift | 60 | — | — | 2.7% | 2,165 | Dec 23, 2025 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Award (A) — Grant or award from the company, not a purchase
- Tax withheld (F) — Shares withheld to pay tax or an exercise price
- Gift (G) — Bona fide gift
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.