The Allstate Corporation is an insurance company that, operating through multiple brands, offers auto, home, life, and other insurance in the U.S. and Canada. Its segments include Allstate Protection, Run-off Property-Liability, Protection Services, Allstate Health and Benefits, and Corporate and Other. Private auto insurance contributes the largest percentage of the company's revenue. Allstate was founded in 1931 and is based in Northbrook, IL.