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Insights

Strategic growth Bermuda-domiciled insurer with a diversified portfolio and recent growth moves through stake in Bishop Street Underwriters, signaling openness to capital deployment and partnerships that expand MGA platform capabilities.

Leadership transition Upcoming CEO transition to Liam Caffrey in 2026 presents an opportunity to align sales approaches with new strategic priorities, potential refresh in partner incentives, and renewed messaging for investors and clients.

Investor engagement Active investor events and informational meetings cited for May and June 2026 create touchpoints to pitch partnership models, co-investment opportunities, and bespoke risk-management solutions to institutional buyers.

Strategic capital Notable $125 million stake in Bishop Street Underwriters signals capacity for larger, value-added investments and potential co-development of underwriting platforms, tech-enabled underwriting, and distribution partnerships.

Tech and modernization Use of modern tech stack and digital tools (Cloudflare, CFML, jQuery, RSS, etc.) alongside traditional insurance operations suggests opportunities to sell modernization services, data analytics, cybersecurity, and cloud-related risk management.

White Mountains Insurance Group Tech Stack

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

  • RSS
    Content Management System
  • Google Fonts API
    Font Scripts
  • jQuery
    Javascript Libraries
  • Slick
    Javascript Libraries
  • Lightbox
    Javascript Libraries
  • Windows Server
    Operating Systems
  • CFML
    Programming Languages
  • Cloudflare Bot Management
    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 Parish hm 11 Bermuda. The company has employees across 1 continents, including North America.

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 NAICS code?

Minus sign iconPlus sign iconWhite Mountains Insurance Group's 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 June 2026, White Mountains Insurance Group has approximately 15 employees across 1 continents, including North America. Key team members include Chief Executive Officer: L. C.Cfo Life Re: W. G.Vp And Cao/Controller: L. B.. 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 RSSGoogle Fonts APIjQuerySlickLightboxWindows ServerCFMLCloudflare Bot Management.

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 logo

White Mountains Insurance Group

InsuranceHamilton Parish, Bermuda11-50 Employees

White Mountains Insurance Group is a diversified holding company operating in the insurance and related financial services sectors, owning and managing a portfolio of businesses. It positions itself as a dependable partner for its portfolio companies and shareholders, aiming to create value through prudent, opportunistic management. The company is domiciled in Hamilton Parish, Bermuda, with executive headquarters in Hanover, New Hampshire, and maintains offices in Boston and Guilford, Connecticut.

It trades on the New York Stock Exchange under the ticker WTM. Manning Rountree retired as chief executive officer at the end of 2025, and Liam Caffrey is slated to assume the role on January 1, 2026.

Section iconCompany Overview

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

Section iconMedia & News

Section iconFunding & Financials

  • $50M$100M

    White Mountains Insurance Group's revenue is estimated to be in the range of $50M$100M

Section iconFunding & Financials

  • $50M$100M

    White Mountains Insurance Group's revenue is estimated to be in the range of $50M$100M

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
    L. B.
    Vp And Cao/Controller
    Phone icon
    Mobile Phone
  • Stylized image of a person
    D. C.
    Vice President And International Tax Counsel
    Phone icon
    Mobile Phone
  • Stylized image of a person
    G. H.
    President
    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
    D. C.
    Vice President And International Tax 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

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