5 Largest Auto Insurance Companies In The US

4. The Allstate Corporation (NYSE:ALL)

Market Share: 10.35%

The Allstate Corporation (NYSE:ALL), based in Glenview, Illinois, is a large American insurance company.

The company was founded in 1931, and it has over 45,000 employees. The Allstate Corporation (NYSE:ALL) provides supplemental insurance coverage to more than 50,000 groups and insures over four million people in the US. It provides auto insurance coverage as well.