Company Description
White Mountains Insurance Group, Ltd., through its subsidiaries, provides insurance and other financial services in the United States.
The company operates through HG Global/BAM, Ark/WM Outrigger, Kudu, and Other Operations segments. The HG Global/BAM segment provides insurance on municipal bonds issued to finance public purposes, such as schools, utilities, and transportation facilities, as well as reinsurance protection services.
The Ark/WM Outrigger segment offers reinsurance and insurance, including property, marine and energy, accident and health, casualty, and specialty products.
The Kudu segment provides capital solutions to boutique asset and wealth managers for generational ownership transfers, management buyouts, acquisitions and growth finances, and legacy partner liquidity, as well as strategic assistance to investees.
The Other Operations segment offers insurance solutions to travel industry through broker channel and on a direct-to-consumer basis; and manages separate accounts and pooled investment vehicles for insurance-linked securities sectors, including catastrophe bonds, collateralized reinsurance investments, and industry loss warranties of third-party clients.
White Mountains Insurance Group, Ltd. was incorporated in 1980 and is headquartered in Hamilton, Bermuda.
| Country | Bermuda |
| Founded | 1980 |
| Industry | Insurance - Property & Casualty |
| Sector | Financials |
| Employees | 893 |
| CEO | George Rountree |
Contact Details
Address: A.S. Cooper Building, Suite 601 Hamilton, HM 11 Bermuda | |
| Phone | 441 278 3160 |
| Website | whitemountains.com |
Stock Details
| Ticker Symbol | WTM |
| Exchange | NYSE |
| Fiscal Year | January - December |
| Reporting Currency | USD |
| CIK Code | 0000776867 |
| CUSIP Number | G9618E107 |
| ISIN Number | BMG9618E1075 |
| Employer ID | 94-2708455 |
| SIC Code | 6331 |
Key Executives
| Name | Position |
|---|---|
| Timothy Michael Miller | Chief Executive Officer of OneBeacon Ltd, President of OneBeacon Ltd and Chief Operating Officer of Onebeacon |
| George Manning Rountree | Chief Executive Officer and Director |
| Liam P. Caffrey | President and Chief Financial Officer |
| Michaela J. Hildreth | MD and Chief Accounting Officer |
| Robert Lawrence Seelig Esq. | Executive Vice President, General Counsel and Investor Relation |
| Giles Edward Harrison | Executive Vice President and Chief Strategy Officer |
| Jonathan Adam Cramer | Chief Investment Officer |
| Jennifer L. Moyer | Chief Administrative Officer and Corporate Secretary |
| David Grant Staples | Head of Tax |
| Dennis Beaulieu | Treasurer |
Latest SEC Filings
| Date | Type | Title |
|---|---|---|
| Aug 11, 2025 | 13F-HR | Quarterly report filed by institutional managers, holdings |
| Aug 7, 2025 | SCHEDULE 13G/A | Filing |
| Aug 7, 2025 | 10-Q | Quarterly Report |
| Aug 7, 2025 | 8-K | Current Report |
| Jul 18, 2025 | 8-K | Current Report |
| Jul 16, 2025 | 8-K | Current Report |
| Jul 7, 2025 | 11-K | Annual report of employee stock purchase, savings and similar plans |
| Jul 7, 2025 | 8-K | Current Report |
| Jun 6, 2025 | 8-K | Current Report |
| May 22, 2025 | 8-K | Current Report |