WHITE MOUNTAINS INSURANCE GROUP LTD (WTM)
NYSE · Fire, Marine & Casualty Insurance · Inc. D0
What they're doing
Between 2026-06-21 and 2026-09-19, public records show 1 signal for WHITE MOUNTAINS INSURANCE GROUP LTD. Most notable: 2026-08-27: Filed 8-K disclosing director or officer change. Federal contract obligations over the last 24 months total $0. This summary was assembled automatically from SEC EDGAR, USAspending.gov, U.S. Senate lobbying disclosures and Wikimedia pageview counts.
Generated 2026-09-19 from public records.
Signals, last 12 months
- Material 8-K filingFiled 8-K disclosing director or officer change
- Material 8-K filingFiled 8-K disclosing director or officer change
- Material 8-K filingFiled 8-K disclosing material agreement
- Large insider saleCAMPBELL REID TARLTON (director) sold $10.3M of stock
- Large insider saleRountree George Manning (director) sold $10.3M of stock
- Material 8-K filingFiled 8-K disclosing acquisition or disposition of assets
- Material 8-K filingFiled 8-K disclosing material agreement
Insider transactions
| Date | Insider | Role | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-08-31 | Tanner David Allen | director | G | 2 | 0 | $0 |
| 2026-08-26 | Klar Stephen | director | A | 113 | 0 | $0 |
| 2026-05-21 | Tanner David Allen | director | A | 135 | 0 | $0 |
| 2026-05-21 | SHANK SUZANNE F. | director | A | 135 | 0 | $0 |
| 2026-05-21 | Hicks Weston M | director | A | 190 | 0 | $0 |
| 2026-05-21 | Gelston Philip A | director | A | 135 | 0 | $0 |
| 2026-05-21 | Dillon Margaret | director | A | 135 | 0 | $0 |
| 2026-05-21 | Chu John | director | A | 135 | 0 | $0 |
| 2026-05-21 | CHOKSI MARY C | director | A | 135 | 0 | $0 |
| 2026-05-21 | Carlson Peter M | director | A | 135 | 0 | $0 |
| 2026-05-21 | CAMPBELL REID TARLTON | director | A | 135 | 0 | $0 |
| 2026-05-21 | Tanner David Allen | director | A | 135 | 0 | $0 |
| 2026-05-21 | SHANK SUZANNE F. | director | A | 135 | 0 | $0 |
| 2026-05-21 | Hicks Weston M | director | A | 190 | 0 | $0 |
| 2026-05-21 | Gelston Philip A | director | A | 135 | 0 | $0 |
| 2026-05-21 | Dillon Margaret | director | A | 135 | 0 | $0 |
| 2026-05-21 | Chu John | director | A | 135 | 0 | $0 |
| 2026-05-21 | CHOKSI MARY C | director | A | 135 | 0 | $0 |
| 2026-05-21 | Carlson Peter M | director | A | 135 | 0 | $0 |
| 2026-05-21 | CAMPBELL REID TARLTON | director | A | 135 | 0 | $0 |
| 2026-03-19 | SEELIG ROBERT LAWRENCE | officer | G | 50 | 0 | $0 |
| 2026-03-19 | SEELIG ROBERT LAWRENCE | officer | G | 50 | 0 | $0 |
| 2026-03-04 | Tanner David Allen | director | G | 225 | 0 | $0 |
| 2026-03-04 | Tanner David Allen | director | G | 225 | 0 | $0 |
| 2026-02-25 | Caffrey Liam P | director | A | 1,500 | 0 | $0 |
| 2026-02-25 | Harrison Giles E | officer | A | 775 | 0 | $0 |
| 2026-02-25 | Hildreth Michaela | officer | A | 600 | 0 | $0 |
| 2026-02-25 | Papamichael Michael A | officer | A | 500 | 0 | $0 |
| 2026-02-25 | SEELIG ROBERT LAWRENCE | officer | A | 775 | 0 | $0 |
| 2026-02-25 | Caffrey Liam P | director | A | 1,500 | 0 | $0 |
| 2026-02-25 | Harrison Giles E | officer | A | 775 | 0 | $0 |
| 2026-02-25 | Hildreth Michaela | officer | A | 600 | 0 | $0 |
| 2026-02-25 | Papamichael Michael A | officer | A | 500 | 0 | $0 |
| 2026-02-25 | SEELIG ROBERT LAWRENCE | officer | A | 775 | 0 | $0 |
| 2026-01-01 | Hildreth Michaela | officer | F | 274 | 2,078.03 | $569,380 |
| 2026-01-01 | Papamichael Michael A | officer | F | 131 | 2,078.03 | $272,222 |
| 2026-01-01 | SEELIG ROBERT LAWRENCE | officer | F | 398 | 2,078.03 | $827,056 |
| 2026-01-01 | Caffrey Liam P | officer | F | 425 | 2,078.03 | $883,163 |
| 2026-01-01 | Hildreth Michaela | officer | F | 274 | 2,078.03 | $569,380 |
| 2026-01-01 | Papamichael Michael A | officer | F | 131 | 2,078.03 | $272,222 |
| 2026-01-01 | SEELIG ROBERT LAWRENCE | officer | F | 398 | 2,078.03 | $827,056 |
| 2026-01-01 | Caffrey Liam P | officer | F | 425 | 2,078.03 | $883,163 |
| 2025-12-23 | Hildreth Michaela | officer | G | 60 | 0 | $0 |
| 2025-12-23 | Hildreth Michaela | officer | G | 60 | 0 | $0 |
| 2025-12-19 | CAMPBELL REID TARLTON | director | S | 5,000 | 2,050 | $10,250,000 |
| 2025-12-19 | CAMPBELL REID TARLTON | director | S | 5,000 | 0 | $0 |
| 2025-12-19 | Rountree George Manning | director | S | 5,000 | 2,050 | $10,250,000 |
| 2025-12-19 | CAMPBELL REID TARLTON | director | S | 5,000 | 2,050 | $10,250,000 |
| 2025-12-19 | CAMPBELL REID TARLTON | director | S | 5,000 | 0 | $0 |
| 2025-12-19 | Rountree George Manning | director | S | 5,000 | 2,050 | $10,250,000 |
Federal contracts
No federal contract actions on record for this recipient mapping.
Lobbying
No federal lobbying filings on record for this client mapping.
Public attention
7-day average 13 views/day vs 90-day median 13.