State Auto Financial Corporation, through its subsidiaries, engages in writing personal and business insurance products in the United States.

It operates through Personal Insurance, Commercial Insurance, and Investment Operations segments.

The Personal Insurance segment primarily provides personal automobile, homeowners, and other personal insurance products.

The commercial insurance segment primarily provides commercial automobile, commercial multi-peril, fire and allied, general liability, and workers' compensation insurance covering small-to-medium sized commercial exposures in the commercial insurance market, as well as farm and ranch insurance products.

The Investment Operations segment provides investment management services to affiliated insurance companies.

The company markets its products primarily through independent agencies, including retail agencies and wholesale brokers.

The company was founded in 1950 and is headquartered in Columbus, Ohio.

State Auto Financial Corporation operates as a subsidiary of State Automobile Mutual Insurance Company, Inc.