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OneBeacon Insurance Group
Industry Insurance
Founded 2001
Headquarters Hamilton, Bermuda
Plymouth, Minnesota (Principal Executive Office)
Key people
Mike Miller, President & CEO
Services Specialty Insurance
Number of employees
Approximately 1,200

OneBeacon Insurance Group, Ltd. is a Bermuda-domiciled holding company that is publicly traded on the New York Stock Exchange under the symbol "OB.”

Mike Miller is the company's President and CEO.


White Mountains/CGU[edit]

On June 1, 2001, White Mountains Insurance Group, Ltd. acquired CGU’s U.S. operations and the company was renamed OneBeacon Insurance Group. Its name is derived from the company’s former “home town” address of 1 Beacon Street in Boston.

IPO & Specialty Niche[edit]

In 2001, the company had two specialty businesses—International Marine Underwriters and A.W.G. Dewar, ocean marine and tuition refund specialists, respectively. OneBeacon began forming additional specialty segments, starting with OneBeacon Professional Insurance (OBPI) in 2002. In 2006, the company held its initial public offering (IPO), and began a full-specialization approach, starting new segments through teams of people or business acquisitions. Between 2009 and 2010, the company sold its nonspecialty commercial lines renewal rights and personal lines.

OneBeacon Specialty Businesses[edit]

Today, OneBeacon features 15 specialty units, and, through its underwriting companies, offers coverages in all 50 states.

The company’s specialty businesses include: A.W.G. Dewar, International Marine Underwriters, OneBeacon Accident Group, OneBeacon Architects & Engineers, OneBeacon Entertainment, OneBeacon Environmental, OneBeacon Financial Institutions, OneBeacon Financial Services, OneBeacon Government Risks, OneBeacon Healthcare Group, OneBeacon Management Liability, OneBeacon Program Group, OneBeacon Specialty Property, OneBeacon Surety Group and OneBeacon Technology Insurance.

External links[edit]