Wal-Mart Stores, Inc. (NYSE: WMT) is an American public corporation that runs a chain of large, discount department stores. It is the world's largest public corporation by revenue, according to the 2007 Fortune Global 500.[4] Founded by Sam Walton in 1962, it was incorporated on October 31, 1969, and listed on the New York Stock Exchange in 1972. It is the largest private employer in the world and the fourth largest utility or commercial employer, trailing the Chinese army, the British National Health Service, and the Indian Railways. Wal-Mart is the largest grocery retailer in the United States, with an estimated 20% of the retail grocery and consumables business, as well as the largest toy seller in the U.S., with an estimated 22% share of the toy market.

Wal-Mart operates in Mexico as Walmex, in the UK as ASDA, and in Japan as Seiyu. It has wholly-owned operations in Argentina, Brazil, Canada, Puerto Rico, and the UK. Wal-Mart's investments outside North America have had mixed results: its operations in South America and China are highly successful, but it sold its retail operations in South Korea and Germany in 2006 after sustained losses.

Wal-Mart has been criticized by some community groups, women's rights groups, grassroots organizations, and labor unions, specifically for its extensive foreign product sourcing, low rates of employee health insurance enrollment, resistance to union representation, and alleged sexism.

Sam Walton, a businessman from Arkansas, began his retail career when he started work on June 3, 1940, at a J.C. Penney store in Des Moines, Iowa where he remained for 18 months. In 1945, he met Butler Brothers, a regional retailer that owned a chain of variety stores called Ben Franklin and that offered him one in Newport, Arkansas.

Walton could neither come to agreement on the existing store's lease renewal nor find a new location in Newport. Instead, he opened a new Ben Franklin franchise in Bentonville, Arkansas, but called it "Walton's Five and Dime." There he achieved higher sales volume by marking up slightly less than most competitors.

On July 2, 1962, Walton opened the first Wal-Mart Discount City store. Within five years, the company expanded to 24 stores across Arkansas and reached $12.6 million in sales. In 1968, it opened its first stores outside Arkansas, in Sikeston, Missouri and Claremore, Oklahoma.