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Insights

Strategic Growth Investment White Mountains Insurance Group is actively expanding its asset base, exemplified by its recent $125 million stake in Bishop Street Underwriters to support MGA platform growth, indicating a focus on strategic investments within the insurance and financial services sectors.

Leadership Transition The company is undergoing a leadership change with the upcoming retirement of CEO Manning Rountree and the appointment of Liam Caffrey as the new CEO effective January 2026, presenting opportunities to engage with decision-makers and understand future strategic directions.

Digital Infrastructure White Mountains employs a modern tech stack featuring WordPress, Cloudflare, and SEO tools like Yoast, suggesting a priority on digital presence and online engagement, which can be leveraged for targeted marketing and digital solutions selling.

Financial Stability With revenues ranging from $100 million to $250 million and a focus on stability and value creation, White Mountains presents potential for tailored financial services, investment products, or risk management solutions aligned with their conservative growth approach.

Industry Positioning As a diversified insurance and financial services holding company with a reputation for careful stewardship and long-term value, White Mountains can be an ideal partner for innovative insurance products, strategic collaborations, or technology-driven risk solutions that complement their growth and investment strategies.

White Mountains Insurance Group Tech Stack

White Mountains Insurance Group uses 8 technology products and services including WordPress, Cloudflare, Google Fonts API, and more. Explore White Mountains Insurance Group's tech stack below.

  • WordPress
    Content Management System
  • Cloudflare
    Content Management System
  • Google Fonts API
    Font Scripts
  • Lightbox
    Javascript Libraries
  • jQuery
    Javascript Libraries
  • Priority Hints
    Performance
  • Yoast SEO
    Search Engines
  • HSTS
    Security

Media & News

White Mountains Insurance Group's Email Address Formats

White Mountains Insurance Group uses at least 1 format(s):
White Mountains Insurance Group Email FormatsExamplePercentage
FLast@whitemountains.comJDoe@whitemountains.com
92%
FirstLast@whitemountains.comJohnDoe@whitemountains.com
4%
First.Last@whitemountains.comJohn.Doe@whitemountains.com
3%
First_Last@whitemountains.comJohn_Doe@whitemountains.com
1%

Frequently Asked Questions

Where is White Mountains Insurance Group's headquarters located?

Minus sign iconPlus sign iconWhite Mountains Insurance Group's main headquarters is located at 26 Reid Street City of Hamilton, Hamilton hm 11 Bermuda. The company has employees across 2 continents, including North AmericaEurope.

What is White Mountains Insurance Group's phone number?

Minus sign iconPlus sign icon You can contact White Mountains Insurance Group's main corporate office by phone at
+1-603-640-****
. For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is White Mountains Insurance Group's stock symbol?

Minus sign iconPlus sign iconWhite Mountains Insurance Group is a publicly traded company; the company's stock symbol is WTM.

What is White Mountains Insurance Group's official website and social media links?

Minus sign iconPlus sign iconWhite Mountains Insurance Group's official website is whitemountains.com and has social profiles on LinkedIn.

What is White Mountains Insurance Group's SIC code NAICS code?

Minus sign iconPlus sign iconWhite Mountains Insurance Group's SIC code is 6331 - Fire, Marine, and Casualty Insurance NAICS code is 524 - Insurance Carriers and Related Activities.

How many employees does White Mountains Insurance Group have currently?

Minus sign iconPlus sign iconAs of March 2026, White Mountains Insurance Group has approximately 15 employees across 2 continents, including North AmericaEurope. Key team members include Chief Executive Officer: L. C.Cfo Life Re: W. G.President: G. H.. Explore White Mountains Insurance Group's employee directory with LeadIQ.

What industry does White Mountains Insurance Group belong to?

Minus sign iconPlus sign iconWhite Mountains Insurance Group operates in the Insurance industry.

What technology does White Mountains Insurance Group use?

Minus sign iconPlus sign iconWhite Mountains Insurance Group's tech stack includes WordPressCloudflareGoogle Fonts APILightboxjQueryPriority HintsYoast SEOHSTS.

What is White Mountains Insurance Group's email format?

Minus sign iconPlus sign iconWhite Mountains Insurance Group's email format typically follows the pattern of FLast@whitemountains.com. Find more White Mountains Insurance Group email formats with LeadIQ.

When was White Mountains Insurance Group founded?

Minus sign iconPlus sign iconWhite Mountains Insurance Group was founded in 1985.

White Mountains Insurance Group

InsuranceHamilton, Bermuda11-50 Employees

White Mountains (NYSE: WTM) is a diversified insurance and related financial services holding company that owns and manages businesses seeking a stable, sophisticated partner to drive value creation. Grounded in the core principles of our visionary founder Jack Byrne, we have been careful, opportunistic and successful stewards of our shareholders’ capital for more than three decades.

We are most proud and protective of our reputation as a good partner – to our shareholders, to other stakeholders in our businesses and to the talented management teams who run them. In the end, doing right by your partners is what guarantees the next deal and the deal after that.

We are domiciled in Hamilton Bermuda, with executive headquarters in Hanover, New Hampshire, and offices in Boston, and Guilford, Connecticut.  For information about career opportunities at White Mountains, please contact careers@whitemountains.com

Section iconCompany Overview

Headquarters
26 Reid Street City of Hamilton, Hamilton hm 11 Bermuda
Phone number
+1-603-640-****
Website
whitemountains.com
SIC Code
6331 - Fire, Marine, and Casualty Insurance
Stock Symbol
WTM
NAICS Code
524 - Insurance Carriers and Related Activities
Founded
1985
Employees
11-50

Section iconMedia & News

Section iconFunding & Financials

  • $100M$250M

    White Mountains Insurance Group's revenue is estimated to be in the range of $100M$250M

Section iconFunding & Financials

  • $100M$250M

    White Mountains Insurance Group's revenue is estimated to be in the range of $100M$250M

Company Leadership

  • Stylized image of a person
    L. C.
    Chief Executive Officer
    Phone icon
    Mobile Phone
  • Stylized image of a person
    W. G.
    Cfo Life Re
    Phone icon
    Mobile Phone
  • Stylized image of a person
    G. H.
    President
    Phone icon
    Mobile Phone
  • Stylized image of a person
    W. H.
    Chairman Of The Board
    Phone icon
    Mobile Phone
  • Stylized image of a person
    M. H.
    Managing Director And Chief Accounting Officer
    Phone icon
    Mobile Phone

Employee Directory

  • Stylized image of a person
    R. S.
    Evp And General Counsel
    Phone icon
    Mobile Phone
  • Stylized image of a person
    G. R.
    Vice President
    Phone icon
    Mobile Phone
  • Stylized image of a person
    R. J.
    Senior Vice President, Equities/Alternative Investments
    Phone icon
    Mobile Phone
  • Stylized image of a person
    R. S.
    Executive Vice President And General Counsel
    Phone icon
    Mobile Phone
  • Stylized image of a person
    N. P. A.
    Director
    Phone icon
    Mobile Phone

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