About Us
Regional Strength. Local Presence.
Founded by the late Herbert C. Ewert, Sr., on June 11, 1931, Badger State Casualty Company Limited Mutual, headquartered in Waukesha, Wisconsin, offered personal auto insurance exclusively in Wisconsin. We changed our name to Badger State Mutual Casualty Company in 1956. Our operating area was expanded to the state of Iowa in 1972. In 1992, we adopted the name of Partners Mutual Insurance.
In 2012, we affiliated with Penn National Insurance, a regional mutual company that operates in the eastern regions of the U.S. We affiliated to gain more growth opportunities and operational efficiencies, and to access emerging technology.

True to our roots, we’re still a mutual insurance company, which means we operate for the benefit of our policyholders through providing superior customer service, and bringing innovative products and services to meet the ever-changing needs of the marketplace.
We sell a diverse array of business insurance, and auto and homeowners insurance. We sell only through independent insurance agents. Independent insurance agents can sell for a variety of insurance companies. They work for their insurance-buying customers and not for the insurance companies. Their customers can feel secure, knowing that their agent is looking out for their best interest and matching them with the best insurance carrier to meet their unique needs.
Our regional structure allows us to respond to our customers’ needs on a local level. Our underwriters and claims adjusters are close to our customers, ready to serve you when you need us most.
We sell our products in 12 states through more than 1,200 independent insurance agency operations. Our territory includes Alabama, Delaware, Iowa, Pennsylvania, Maryland, Minnesota, New Jersey, North Carolina, South Carolina, Tennessee, Virginia and Wisconsin. In addition, we have local offices in Pittsburgh, Pa., Nashville, Tenn., Greensboro, N.C., Harrisburg, Pa. and Lawrenceville, N.J. Partners Mutual Insurance Company, serves Minnesota, Wisconsin and Iowa from its office located in Waukesha, Wis.
About Penn National Insurance
- We employ more than 800 people
- We sell through more than 1,200 independent agency operations in 12 states
- We were founded in 1919
- Our principal lines of business are Personal Automobile, Workers’ Compensation, Commercial automobile and Homeowners
- We have a financial strength rating of A (Excellent) with a Stable Outlook from A.M. Best