OneBeacon Insurance Group
OneBeacon is rated "A" (Excellent), class XV, by A.M. Best, "A2" by Moody's,
"A" by Standard & Poor's, and "A" by Fitch Ratings. The company is publicly traded on the New York
Stock Exchange under the symbol "OB". White Mountains Insurance Group remains a principal owner.
OneBeacon Insurance Group offers a range of specialty and segmented commercial and personal
insurance products sold primarily through select independent agents. As one of the oldest
property and casualty insurers in the United States, OneBeacon traces its roots to 1831 and the
Potomac Fire Insurance Company. Today, OneBeacon's specialty insurance products are available
countrywide, and commercial and personal lines are offered in select geographic territories.
OneBeacon Insurance Group's U.S. headquarters is in Canton, Massachusetts.