Commerce Holdings is a subsidiary of the Commerce Group. Established in 1971, the Commerce Group provides personal and commercial property and casualty insurance in Massachusetts and New Hampshire through its subsidiaries. The group s core product lines include personal automobile, homeowners and commercial automobile insurance. Its subsidiary, Commerce Insurance, is one of the leading providers of private passenger, homeowner and commercial automobile insurance in Massachusetts. The subsidiary markets products exclusively through professional independent agents. The group s other property and casualty insurance subsidiaries include Citation Insurance Company in Massachusetts, Commerce West Insurance Company in California and American Commerce Insurance Company in Ohio. Commerce Holdings is located in Webster, Mass.