Walmart is a global retail chain in the United States. It was founded by Mr. Sam Walton in 1962 and is headquartered in Bentonville, Arkansas, USA. The company has ranked first among the world's top 500 companies for three consecutive years. Wal-Mart has four main business formats: Wal-Mart shopping malls, Sam's Club, Wal-Mart stores, Wal-Mart communities, etc.