The Progressive Corporation is an insurance holding company. The Company's insurance subsidiaries and affiliates provide personal and commercial automobile and property insurance, other specialty property-casualty insurance and related services. The Company operates through the Personal Lines, Commercial Lines and Property segments. The Company's Personal Lines segment writes insurance for personal autos, and recreational and other vehicles. The Commercial Lines business writes primary liability, physical damage and other auto-related insurance for automobiles and trucks owned and/or operated predominately by small businesses as a part of the commercial auto market. ASI is a homeowner carrier in the United States, which specializes in personal and commercial property insurance, personal umbrella insurance, and primary and excess flood insurance. The Company's service business includes Commercial Auto Insurance Procedures/Plans (CAIP) and Commission-based businesses.