Auto-Owners Insurance is a group of insurance companies based in Delta Township, Michigan, just west of Lansing. The Company offers property and casualty insurance, including personal and commercial lines, as well as life insurance. It is the largest property and casualty insurance company headquartered in Michigan with over $16 billion in assets and over $5 billion in written premium.Auto-Owners was founded in 1916 and now has 94 full-service and claims branches nationwide.