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| Keyboard |
| White Mountains Insurance Group Ltd | |
|---|---|
| Ticker | WTM |
| CIK # | 0000776867 |
| CUSIP | G9618E107 |
| Sector | Finance - Fire, Marine & Casualty Insurance |
| Address | 80 South Main St, Hanover, NH 03755 |
| Source | [EDGAR] |
| CIK | Filing | 2011 - 2026 |
|---|---|---|
| [0000776867] | 10-K | |
| [0000776867] | 10-Q | |
| [0000776867] | 13F-HR | |
| [0000776867] | 13F-NT | |
| [0000776867] | 3 | |
| [0000776867] | 4 | |
| [0000776867] | 5 | |
| [0000776867] | 8-K | |
| [0000776867] | SC 13D | |
| [0000776867] | SC 13G |
| Insider Transaction (Form 3/4/5) | Date | Action | Shares | Price | Value ($) |
|---|---|---|---|---|---|
|
Seelig Robert Lawrence
Common Shares
|
2026-03-19 | Gift | 50 | $0.00 | |
|
Tanner David Allen
Common Shares
|
2026-03-04 | Gift | 225 | $0.00 | |
|
Hildreth Michaela
Common Shares (Restricted)
|
2026-02-25 | Grant | 600 | $0.00 | |
|
Caffrey Liam P
Common Shares (Restricted)
|
2026-02-25 | Grant | 1,500 | $0.00 | |
|
Harrison Giles E
Common Shares (restricted)
|
2026-02-25 | Grant | 775 | $0.00 | |
|
Papamichael Michael A
Common Shares (Restricted)
|
2026-02-25 | Grant | 500 | $0.00 | |
|
Seelig Robert Lawrence
Common Shares (restricted)
|
2026-02-25 | Grant | 775 | $0.00 | |
|
Caffrey Liam P
Common Shares
|
2026-01-01 | Tax withheld | 425 | $2,078.03 | 883,163 |
|
Papamichael Michael A
Common Shares
|
2026-01-01 | Tax withheld | 131 | $2,078.03 | 272,222 |
|
Seelig Robert Lawrence
Common Shares
|
2026-01-01 | Tax withheld | 398 | $2,078.03 | 827,056 |
|
Hildreth Michaela
Common Shares
|
2026-01-01 | Tax withheld | 274 | $2,078.03 | 569,380 |
|
Hildreth Michaela
Common Shares
|
2025-12-23 | Gift | 60 | $0.00 | |
|
Rountree George Manning
Common Shares
|
2025-12-19 | Sell | 5,000 | $2,050.00 | 10,250,000 |
|
Campbell Reid Tarlton
Common Shares
|
2025-12-19 | Sell | 5,000 | $0.00 | |
|
Common Shares
|
2025-12-19 | Sell | 5,000 | $2,050.00 | 10,250,000 |
|
Gelston Philip A
Common Shares
|
2025-12-16 | Sell | 165 | $2,048.51 | 338,004 |
|
Campbell Reid Tarlton
Common Shares
|
2025-11-25 | Gift | 50 | $0.00 | |
|
Tanner David Allen
Common Shares
|
2025-11-10 | Gift | 4 | $0.00 | |
|
Shank Suzanne F
Common Shares
|
2025-05-22 | Grant | 150 | $0.00 | |
|
Dillon Margaret
Common Shares
|
2025-05-22 | Grant | 150 | $0.00 | |
| showing 20 of 200 most recent transactions | |||||
| 13F Ownership Over Time | Holders | Shares Held |
|---|---|---|
| 2026-03-31 | 367 | 2,114,194 |
| 2025-12-31 | 352 | 2,259,418 |
| 2025-09-30 | 338 | 2,226,930 |
| 2025-06-30 | 326 | 2,199,299 |
| 2025-03-31 | 324 | 2,175,554 |
| 2024-12-31 | 325 | 2,145,515 |
| 2024-09-30 | 304 | 2,119,278 |
| 2024-06-30 | 306 | 2,154,257 |
| 2024-03-31 | 303 | 2,564,090 |
| 2023-12-31 | 295 | 2,392,997 |
| 2023-09-30 | 269 | 2,192,463 |
| 2023-06-30 | 258 | 2,212,717 |