Bermuda-based White Mountains Insurance Group Ltd. announced today that Berkshire Hathaway has agreed to a sale of its 16.3 percent stake in White Mountains for cash and stock valued at $836 million.

A.M. Best said there would be no ratings change for White Mountains as a result.

Under the terms of the agreement, Berkshire Hathaway would exchange all or substantially all of its 1,724,200 common shares for 100 percent of a White Mountains subsidiary, which will hold Commercial Casualty Insurance Company, International American Group Inc. and $751 million in cash, subject to adjustment.

Recommended For You

Want to continue reading?
Become a Free PropertyCasualty360 Digital Reader

Your access to unlimited PropertyCasualty360 content isn’t changing.
Once you are an ALM digital member, you’ll receive:

  • Breaking insurance news and analysis, on-site and via our newsletters and custom alerts
  • Weekly Insurance Speak podcast featuring exclusive interviews with industry leaders
  • Educational webcasts, white papers, and ebooks from industry thought leaders
  • Critical converage of the employee benefits and financial advisory markets on our other ALM sites, BenefitsPRO and ThinkAdvisor
NOT FOR REPRINT

© 2025 ALM Global, LLC, All Rights Reserved. Request academic re-use from www.copyright.com. All other uses, submit a request to [email protected]. For more information visit Asset & Logo Licensing.