Symbols

Symbols

WTM

WTM News

Recent Updates

White Mountains Partners, a subsidiary of White Mountains Insurance Group, acquired a majority interest in BaseSix Systems to fuel its growth through new offices and strategic acquisitions.

Generated at21:3304/03/2026by

Aime

Newswire

13:02

White Mountains Insurance Group's 15min chart shows KDJ Golden Cross, bullish Marubozu.

16:17

White Mountains Partners Acquires Majority Interest in BaseSix Systems LLC

10:02

White Mountains Insurance Group Triggers MACD Death Cross and KDJ Death Cross

13:47

White Mountains Insurance Group's 15min chart triggers Bollinger Bands Expanding Downward.

13:02

White Mountains Insurance Group Triggers MACD Death Cross and KDJ Death Cross

About WTM

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SectorInsurance

Established Date--

Listing Date25/10/1985

ExchangeNew York Stock Exchange

Full-time Employees1648

Fiscal Year Ends31/12

Websitewww.whitemountains.com

Security TypeCommon stock

Office address23 South Main Street, Suite 3B, Hanover, New Hampshire 03755-2053

Business

Introduction

White Mountains Insurance Group Limited is a Bermuda exempted limited liability company engaged in opportunistic and value-oriented acquisitions in the insurance and financial services sectors. The company operates through its subsidiaries and affiliates and is headquartered in Hamilton, Bermuda, with an administrative office in Hanover, New Hampshire. As of December 31, 2025, the company operates in five main areas: property and casualty insurance and reinsurance, municipal bond guarantee reinsurance, capital solutions for asset and wealth management companies, specialty insurance distribution, and other businesses.