Commerce Group, Inc. is engaged in providing personal and commercial property and casualty insurance primarily in Massachusetts through its principal subsidiary, The Commerce Insurance Company (Commerce). The Companys predominant insurance line is motor vehicle insurance, primarily covering Massachusetts personal automobiles. Commerce Group also offers commercial automobile, homeowners, inland marine, fire, general liability, commercial multi-peril and personal and commercial umbrella insurance. The Company also writes insurance in California and Oregon through Commerce West Insurance Company, located in Pleasanton, California, which primarily focuses on personal automobile insurance and also writes commercial automobile insurance. Additionally, the Commerce Group writes insurance through American Commerce Insurance Company, which writes primarily personal automobile insurance and also writes homeowner insurance.