Walmart Inc. is an American multinational retail corporation that operates a chain of hypermarkets, discount department stores, and grocery stores from the United States, headquartered in Bentonville, Arkansas. The company was founded by Sam Walton in nearby Rogers, Arkansas in 1962 and incorporated under Delaware General Corporation Law on October 31, 1969. It also owns and operates Sam's Club retail warehouses. As of January 31, 2021, Walmart has 11,443 stores and clubs in 26 countries, operating under 54 different names. The company operates under the name Walmart in the United States and Canada, as Walmart de México y Centroamérica in Mexico and Central America, it is affiliated with Asda in the United Kingdom, as the Seiyu Group in Japan, and as Flipkart Wholesale in India. It has wholly owned operations in Argentina, Chile, Canada, and South Africa. Since August 2018, Walmart holds only a minority stake in Walmart Brasil, which was renamed Grupo Big in August 2019, with 20 percent of the company's shares, and private equity firm Advent International holding 80 percent ownership of the company. Walmart is the world's largest company by revenue, with US$548.743 billion, according to the Fortune Global 500 list in 2020. It is also the largest private employer in the world with 2.2 million employees. It is a publicly traded family-owned business, as the company is controlled by the Walton family. Sam Walton's heirs own over 50 percent of Walmart through both their holding company Walton Enterprises and their individual holdings. Walmart was the largest United States grocery retailer in 2019, and 65 percent of Walmart's US$510.329 billion sales came from U.S. operations.