White Mountains Insurance Group is a diversified insurance and related financial services holding company based in Hamilton, Bermuda. Redomiciled from Delaware, United States, on October 25, 1999, the company conducts most of its business through its insurance subsidiaries and other affiliates.[1]
The company owned the automobile insurer Esurance before selling it to Allstate for $1 billion.[2]
Heritage
White Mountains Insurance Group began in the early 1980s by John J. Byrne, the man recruited by American Express to turn around troubled property and casualty insurer Fireman's Fund.[3] When Byrne took Fireman's Fund public in 1985, it was the largest IPO in American history,[4] and the insurer was sold to Allianz six years later.[5]