Wal-Mart Stores, Inc. (formerly branded as Wal-Mart, branded as Walmart since 2008) (NYSE: WMT) is an American public corporation that runs a chain of large discount department stores and a chain of membership required warehouse stores. In 2010 it was the world's largest public corporation by revenue, according to the Forbes Global 2000 for that year. The company was founded by Sam Walton in 1962, incorporated on October 31, 1969, and publicly traded on the New York Stock Exchange in 1972. Wal-Mart, headquartered in Bentonville, Arkansas, is the largest majority private employer and the largest grocery retailer in the United States. In 2009, it generated 51% of its US$258 billion sales in the U.S. from grocery business. It also owns and operates the Sam's Club retail warehouses in North America.

Wal-Mart operates under its own name in the United States, including the 50 states and Puerto Rico. Wal-Mart operates in Mexico as Walmex, in the United Kingdom as Asda ("Asda Wal-Mart" in some branches), in Japan as Seiyu, and in India as Best Price. It has wholly-owned operations in Argentina, Brazil, and Canada. Wal-Mart's investments outside North America have had mixed results: its operations in the United Kingdom, South America and China are highly successful, while it was forced to pull out of Germany and South Korea when ventures there were unsuccessful.