WHITE MOUNTAINS INSURANCE GP (WTM) Stock Ownership and Short Interest
USA - New York Stock Exchange - NYSE:WTM - BMG9618E1075 - Common Stock
2041.9 USD
-36.13 (-1.74%)
2050 USD
+8.1 (+0.4%)
| Shares Outstanding | 2.52M |
| Float | 2.44M |
| Float Short Interest Percentage | 3.57% |
| Owners (insider) | 1.1% |
| Owners (institutional) | 97.26% |
| Owners (insider) change | -10.7% |
| Owners (institutional) change | 0% |
Insider Transactions
Top Institutional Holders
Insider Owners
| Date | Name | Type | Shares | Price | Amount |
|---|---|---|---|---|---|
| Jan 1, 2026 | Papamichael Michael A | Option Excercise | 131 | 2,078.03 | $ 272,221.93 |
| Jan 1, 2026 | SEELIG ROBERT LAWRENCE | Option Excercise | 398 | 2,078.03 | $ 827,055.94 |
| Jan 1, 2026 | Caffrey Liam P | Option Excercise | 425 | 2,078.03 | $ 883,162.75 |
| Dec 23, 2025 | Hildreth Michaela | Other Disposition | 60 | 0.00 | $ 0.00 |
| Dec 19, 2025 | CAMPBELL REID TARLTON | Open Market Sale | 5000 | 0.00 | $ 0.00 |
| Dec 19, 2025 | Rountree George Manning | Open Market Sale | 5000 | 2,050.00 | $ 10,250,000.00 |
| Dec 19, 2025 | CAMPBELL REID TARLTON | Open Market Sale | 5000 | 2,050.00 | $ 10,250,000.00 |
| Dec 16, 2025 | Gelston Philip A | Open Market Sale | 165 | 2,048.51 | $ 338,004.15 |
| Nov 25, 2025 | CAMPBELL REID TARLTON | Other Disposition | 50 | 0.00 | $ 0.00 |
| Nov 10, 2025 | Tanner David Allen | Other Disposition | 4 | 0.00 | $ 0.00 |
| May 22, 2025 | Tanner David Allen | Grant | 150 | 0.00 | $ 0.00 |
| May 22, 2025 | Hicks Weston M | Grant | 210 | 0.00 | $ 0.00 |
| May 22, 2025 | Gelston Philip A | Grant | 150 | 0.00 | $ 0.00 |
| May 22, 2025 | Yi Steven | Grant | 150 | 0.00 | $ 0.00 |
| May 22, 2025 | Dillon Margaret | Grant | 150 | 0.00 | $ 0.00 |
| May 22, 2025 | CHOKSI MARY C | Grant | 150 | 0.00 | $ 0.00 |
| May 22, 2025 | Carlson Peter M | Grant | 150 | 0.00 | $ 0.00 |
| May 22, 2025 | CAMPBELL REID TARLTON | Grant | 150 | 0.00 | $ 0.00 |
| May 22, 2025 | SHANK SUZANNE F. | Grant | 150 | 0.00 | $ 0.00 |
| Feb 26, 2025 | Rountree George Manning | Grant | 1625 | 0.00 | $ 0.00 |
| Feb 26, 2025 | Caffrey Liam P | Grant | 1025 | 0.00 | $ 0.00 |
| Feb 26, 2025 | Harrison Giles E | Grant | 900 | 0.00 | $ 0.00 |
| Feb 26, 2025 | SEELIG ROBERT LAWRENCE | Grant | 825 | 0.00 | $ 0.00 |
| Feb 26, 2025 | Hildreth Michaela | Grant | 625 | 0.00 | $ 0.00 |