White Mountains Insurance Group, Ltd. (WTM)
NYSE: WTM · Real-Time Price · USD
2,124.18
-41.42 (-1.91%)
Mar 9, 2026, 2:16 PM EDT - Market open

Company Description

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.

White Mountains Insurance Group, Ltd.
White Mountains Insurance Group logo
Country Bermuda
Founded 1980
Industry Insurance - Property & Casualty
Sector Financials
Employees 1,648
CEO Liam Caffrey

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
Liam P. Caffrey Chief Executive Officer and Director
Giles Edward Harrison President
Michaela J. Hildreth MD and Chief Accounting Officer
Robert Lawrence Seelig Esq. Executive Vice President, General Counsel and Investor Relation
George Manning Rountree Senior Advisor
Michael Papamichael MD and Chief Financial 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
Feb 27, 2026 10-K Annual Report
Feb 26, 2026 8-K Current Report
Feb 12, 2026 13F-HR Quarterly report filed by institutional managers, holdings
Feb 12, 2026 SCHEDULE 13G/A Filing
Feb 6, 2026 8-K Current Report
Feb 5, 2026 SCHEDULE 13G Filing
Jan 7, 2026 8-K Current Report
Dec 29, 2025 SC TO-I/A Filing
Dec 22, 2025 SC TO-I/A Filing
Dec 8, 2025 8-K Current Report