WTM
White Mountains Insurance Group, Ltd.
NYSE · Financial Services · Insurance - Property & Casualty · BM
$2,095.70
−0.78%0
Insider buys (3m)
0
Insider sells (3m)
$0.00
Net value (3m)
+1.1%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Aug 27, 2026 | Klar Stephen · director | A-Award | 113 | $0.00 |
| May 22, 2026 | Carlson Peter M · director | A-Award | 135 | $0.00 |
| May 22, 2026 | SHANK SUZANNE F. · director | A-Award | 135 | $0.00 |
| May 22, 2026 | Dillon Margaret · director | A-Award | 135 | $0.00 |
| May 22, 2026 | Hicks Weston M · director | A-Award | 190 | $0.00 |
| May 22, 2026 | Chu John · director | A-Award | 135 | $0.00 |
| May 22, 2026 | CAMPBELL REID TARLTON · director | A-Award | 135 | $0.00 |
| May 22, 2026 | Gelston Philip A · director | A-Award | 135 | $0.00 |
| May 22, 2026 | CHOKSI MARY C · director | A-Award | 135 | $0.00 |
| May 22, 2026 | Tanner David Allen · director | A-Award | 135 | $0.00 |
| Feb 27, 2026 | Hildreth Michaela · officer: MD & Chief Accounting Officer | A-Award | 600 | $0.00 |
| Feb 27, 2026 | Papamichael Michael A · officer: Chief Financial Officer | A-Award | 500 | $0.00 |
| Feb 27, 2026 | SEELIG ROBERT LAWRENCE · officer: EVP & General Counsel | A-Award | 775 | $0.00 |
| Feb 27, 2026 | Caffrey Liam P · director, officer: Chief Executive Officer | A-Award | 1,500 | $0.00 |
| Feb 27, 2026 | Harrison Giles E · officer: President | A-Award | 775 | $0.00 |
| Jan 5, 2026 | Hildreth Michaela · officer: MD & Chief Accounting Officer | F-InKind | 274 | $2.1K |
| Jan 2, 2026 | Papamichael Michael A · officer: Chief Financial Officer | F-InKind | 131 | $2.1K |
| Jan 2, 2026 | Caffrey Liam P · officer: Chief Executive Officer | F-InKind | 425 | $2.1K |
| Jan 2, 2026 | SEELIG ROBERT LAWRENCE · officer: EVP & General Counsel | F-InKind | 398 | $2.1K |
| Dec 22, 2025 | Rountree George Manning · director, officer: Chief Executive Officer | Sale | 5,000 | $2.0K |
| Dec 22, 2025 | CAMPBELL REID TARLTON · director | Sale | 5,000 | $2.0K |
| Dec 16, 2025 | Gelston Philip A · director | Sale | 165 | $2.0K |
| May 27, 2025 | SHANK SUZANNE F. · director | A-Award | 150 | $0.00 |
| May 23, 2025 | Carlson Peter M · director | A-Award | 150 | $0.00 |
| May 23, 2025 | CHOKSI MARY C · director | A-Award | 150 | $0.00 |
| May 23, 2025 | Dillon Margaret · director | A-Award | 150 | $0.00 |
| May 23, 2025 | Gelston Philip A · director | A-Award | 150 | $0.00 |
| May 23, 2025 | Hicks Weston M · director | A-Award | 210 | $0.00 |
| May 23, 2025 | Tanner David Allen · director | A-Award | 150 | $0.00 |
| May 23, 2025 | Yi Steven · director | A-Award | 150 | $0.00 |
Institutional positioning
13F filings over the trailing two quarters
New 88Increased 216Reduced 260Sold out 43
| Filer | Action | Shares | Filed |
|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP | Increased | 158,954 | Aug 11, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Increased | 156,618 | May 7, 2026 |
| NEUBERGER BERMAN GROUP LLC | Reduced | 124,715 | May 14, 2026 |
| RIVER ROAD ASSET MANAGEMENT, LLC | Reduced | 120,519 | Apr 30, 2026 |
| Neuberger Berman Group LLC | Reduced | 119,141 | Aug 13, 2026 |
| BlackRock, Inc. | Increased | 117,871 | Aug 7, 2026 |
| River Road Asset Management, LLC | Reduced | 115,880 | Jul 17, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 115,553 | May 8, 2026 |
| BLACKROCK, INC. | Increased | 113,328 | May 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 111,969 | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 109,157 | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 107,479 | Aug 13, 2026 |
| COOKE & BIELER LP | Reduced | 104,857 | May 4, 2026 |
| FULLER & THALER ASSET MANAGEMENT, INC. | Reduced | 104,561 | May 14, 2026 |
| FULLER & THALER ASSET MANAGEMENT, INC. | Reduced | 101,892 | Aug 12, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Aug 27, 2026