Grant Thornton

Grant Thornton is one of the largest audit, tax, and advisory firms in the United States, tracing its roots to 1924 when 26-year-old Alexander Richardson Grant founded Alexander Grant & Co. in Chicago after leaving Ernst & Ernst to build a firm dedicated to serving mid-sized companies. Grant Thornton LLP is the U.S. member firm of Grant Thornton International, one of the world's leading networks of independent audit, tax, and advisory firms, serving clients across industries including banking, healthcare, manufacturing, and technology. The firm remains headquartered in Chicago and continues to expand its advisory, AI, and technology modernization practices.