Figures computed from official regulatory filings — .
Analysttarget 360 USD (-82%)
Ownershipinsiders 3.22% · institutions 96.29% · short 5.9% of float
In USD · as of Oct 5, 2026
Ask the machine
Search and compare insider transactions, companies and their statistics in plain language. Your question becomes a query over available data, not a conversation or investment advice.
Data for WHITE MOUNTAINS INSURANCE GROUP LTD only. No web search. Global per-insider statistics are excluded.
An executed search uses one credit, even with no results. Errors and unsupported questions use no credits.
White Mountains Insurance Group, Ltd. provides insurance services in the United States, the United Kingdom, Bermuda, and internationally. It operates through Ark/WM Outrigger, HG Global, Kudu, Distinguished, and Other Operations segments. The company offers property insurance and reinsurance; specialty insurance and reinsurance consisting of aviation, contingency, cyber, fine art and specie, mortgage, nuclear, political and credit, space, surety, and terrorism and political violence; marine and energy insurance and reinsurance; casualty insurance and reinsurance, such as medical malpractice, and professional and general liability; and accident and health insurance and reinsurance, which includes personal accident, sickness, disability, travel, short-term life, and medical products through brokers, managing general agents (MGA), and reinsurance intermediaries. It also provides municipal bond guarantee reinsurance, which focuses on single risk limits for small-to-medium sized, and public investment grade municipal bonds that are issued to finance public purpose projects, including schools, utilities, and transportation facilities. In addition, the company offers capital solutions for boutique asset and wealth managers for generational ownership transfers, management buyouts, acquisition and growth finance, and legacy partner liquidity; strategic advice; investment management; and specialty electrical contracting services. Further, it operates as a full-service MGA and program administrator for specialty property and casualty insurance for the real estate and hospitality end markets, and start-up programs; and an MGA for leisure travel and global expatriate medical insurance in Israel, the European Union, and Australia. The company was formerly known as Fund American Enterprises Holdings, Inc. and changed its name to White Mountains Insurance Group, Ltd. in 1999. White Mountains Insurance Group, Ltd. was incorporated in 1980 and is headquartered in Hamilton, Bermuda.
Market information source · Oct 5, 2026
Periods recorded in the consulted sources. These do not certify the legal dates of name changes.
SEC company identity · Oct 5, 2026
Open-market timeline · full history
145 buys254 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| Tanner David Allen | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Klar Stephen | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| CAMPBELL REID TARLTON | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Gelston Philip A | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| SHANK SUZANNE F. | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Chu John | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| CHOKSI MARY C | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Carlson Peter M | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Tanner David Allen | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| HICKS WESTON Mtrack record | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Dillon Margaret | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| SEELIG ROBERT LAWRENCEtrack record | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Tanner David Allen | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| SEELIG ROBERT LAWRENCEtrack record | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Harrison Giles E | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Caffrey Liam P | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Papamichael Michael A | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Hildreth Michaela | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Hildreth Michaela | Other | $569.4K | SEC |
| SEELIG ROBERT LAWRENCEtrack record | Other | $827.1K | SEC |
| Papamichael Michael A | Other | $272.2K | SEC |
| Caffrey Liam P | Other | $883.2K | SEC |
| Hildreth Michaela | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| CAMPBELL REID TARLTON | Sell | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| CAMPBELL REID TARLTON | Sell | $10.3M | Unusual size | SEC |