White Mountains Insurance Group Ltd
WTMFigures shown here come from public SEC filings. Dates beside each section show the available history.
How White Mountains Insurance Group Ltd Makes Money
Follow each dollar of revenue through to what shareholders keep.
From revenue to net income
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Financial Summary
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SEC filings supply these figures; updates after the dates shown are not included. This page includes 18 annual periods. The latest annual period ends Dec 31, 2025. The latest insider filing shown is dated May 22, 2026.
Ownership
Who holds the shares, as reported in SEC ownership filings.
Purchases & sales (open market or private)
| Security | Code | Price | Filing | |||
|---|---|---|---|---|---|---|
| 2025-12-19 (amended) | CAMPBELL REID TARLTON · Director | Common Shares | S — Open market or private sale | −5,000 | 2,050.00 | SEC filing |
| 2025-12-19 | CAMPBELL REID TARLTON · Director | Common Shares | S — Open market or private sale | −5,000 | 0.00 | SEC filing |
| 2025-12-19 | Rountree George Manning · Chief Executive Officer | Common Shares | S — Open market or private sale | −5,000 | 2,050.00 | SEC filing |
| 2025-12-16 | Gelston Philip A · Director | Common Shares | S — Open market or private sale | −165 | 2,048.51 | SEC filing |
| 2023-11-17 (amended) | Hicks Weston M · Director | Common Shares | P — Open market or private purchase | +120 | 1,476.74 | SEC filing |
| 2023-11-17 (amended) | Hicks Weston M · Director | Common Shares | P — Open market or private purchase | +11 | 1,483.43 | SEC filing |
| 2023-11-17 (amended) | Hicks Weston M · Director | Common Shares | P — Open market or private purchase | +238 | 1,484.96 | SEC filing |
| 2023-11-17 (amended) | Hicks Weston M · Director | Common Shares | P — Open market or private purchase | +579 | 1,479.88 | SEC filing |
Showing 8 of 20 rows
Grants, exercises, tax & gifts
| Security | Code | Filing | |||
|---|---|---|---|---|---|
| 2026-05-21 | CHOKSI MARY C · Director | Common Shares | A — Grant, award, or other acquisition | +135 | SEC filing |
| 2026-05-21 | Hicks Weston M · Director | Common Shares | A — Grant, award, or other acquisition | +190 | SEC filing |
| 2026-05-21 | Tanner David Allen · Director | Common Shares | A — Grant, award, or other acquisition | +135 | SEC filing |
| 2026-05-21 | Gelston Philip A · Director | Common Shares | A — Grant, award, or other acquisition | +135 | SEC filing |
| 2026-05-21 | Carlson Peter M · Director | Common Shares | A — Grant, award, or other acquisition | +135 | SEC filing |
| 2026-05-21 | CAMPBELL REID TARLTON · Director | Common Shares | A — Grant, award, or other acquisition | +135 | SEC filing |
| 2026-05-21 | Dillon Margaret · Director | Common Shares | A — Grant, award, or other acquisition | +135 | SEC filing |
| 2026-05-21 | SHANK SUZANNE F. · Director | Common Shares | A — Grant, award, or other acquisition | +135 | SEC filing |
Showing 8 of 30 rows
These tables describe filed transactions, not current holdings. Prices are shown as filed; a currency is added only when the filing's data names one. Amended and possible duplicate rows are left out of size comparisons and transaction groups.