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The Allstate Corporation NYSE: ALL is the largest publicly held personal lines insurer in the United States and the second-largest of all personal lines insurers in the U.S. Allstate was founded in 1931 as part of Sears, Roebuck and Company. Allstate sells auto insurance, home insurance (in certain localities), life insurance, umbrella insurance, and commercial insurance.

General Motors Corporation, also known as GM, an American multinational corporation, is the world's largest auto company by production volume for the first 9 months of 2007, and by sales volume since 1931. [4] However, it ranks second behind Toyota in net worth, revenue and profit.

Grant Thornton LLP is the US member firm of Grant Thornton International, one of the six global accounting, tax and business advisory organizations.

Northern Trust Corporation NASDAQ: NTRS is a leading provider of investment management, asset and fund administration, fiduciary and banking solutions for corporations, institutions and individuals worldwide. Northern Trust, a multi-bank holding company based in Chicago, has a network of 85 offices in 18 U.S. states and has international offices in 12 locations in North America, Europe and the Asia-Pacific region.