OneBeacon Grows Personal Insurance Operations with Houston General

November 2, 2005

OneBeacon Insurance Group, a wholly owned subsidiary of White Mountains Insurance Group, Ltd., has entered into an agreement with Houston General Insurance Exchange to offer auto, homeowners and packaged solutions outside its core territory in the Northeast.

Houston General Insurance Exchange is a full-service property/casualty insurance carrier that is owned by its policyholder members. The company is managed by Houston General Insurance Management Company, a subsidiary of OneBeacon. Arizona is the inaugural state for Houston General Insurance Exchange business.

Arizona drivers and homeowners can safeguard their cars, homes, boats and other valuables with OneChoice Auto, OneChoice Homeowners and OneChoice Package. Houston General, like OneBeacon, markets its products exclusively through select independent agents.

Dan Speas, Business Development manager for Arizona, said, “We believe in the added value that local agents bring to the customer. Being right there in the communities where our members live and work makes a big difference. We see the partnership between the independent agent and Houston General as a winning combination.”

Houston General plans to expand into other states in 2006.