White Mountains Insurance Group, Ltd. (WTM)
NYSE: WTM · Real-Time Price · USD
1,715.50
+0.10 (0.01%)
At close: Sep 16, 2025, 4:00 PM EDT
1,714.51
-0.99 (-0.06%)
Pre-market: Sep 17, 2025, 5:01 AM EDT

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.

White Mountains Insurance Group, Ltd.
White Mountains Insurance Group logo
CountryBermuda
Founded1980
IndustryInsurance - Property & Casualty
SectorFinancials
Employees893
CEOGeorge Rountree

Contact Details

Address:
A.S. Cooper Building, Suite 601
Hamilton, HM 11
Bermuda
Phone441 278 3160
Websitewhitemountains.com

Stock Details

Ticker SymbolWTM
ExchangeNYSE
Fiscal YearJanuary - December
Reporting CurrencyUSD
CIK Code0000776867
CUSIP NumberG9618E107
ISIN NumberBMG9618E1075
Employer ID94-2708455
SIC Code6331

Key Executives

NamePosition
George Manning RountreeChief Executive Officer and Director
Liam P. CaffreyPresident and Chief Financial Officer
Michaela J. HildrethMD and Chief Accounting Officer
Robert Lawrence Seelig Esq.Executive Vice President, General Counsel and Investor Relation
Giles Edward HarrisonExecutive Vice President and Chief Strategy Officer
Jonathan Adam CramerChief Investment Officer
Jennifer L. MoyerChief Administrative Officer and Corporate Secretary
David Grant StaplesHead of Tax
Michael PapamichaelMD and Deputy Chief Financial Officer
Dennis BeaulieuTreasurer

Latest SEC Filings

DateTypeTitle
Sep 3, 20258-KCurrent Report
Sep 2, 20258-KCurrent Report
Aug 27, 2025N-PXAnnual Report of proxy voting record of management investment companies
Aug 11, 202513F-HRQuarterly report filed by institutional managers, holdings
Aug 7, 2025SCHEDULE 13G/AFiling
Aug 7, 202510-QQuarterly Report
Aug 7, 20258-KCurrent Report
Jul 18, 20258-KCurrent Report
Jul 16, 20258-KCurrent Report
Jul 7, 202511-KAnnual report of employee stock purchase, savings and similar plans