I like to shop at Walmart
Wal-Mart Stores, Inc., doing business as Walmart, is an American multinational retail 
That is correct
A brief history shows that  Headquartered in Bentonville, Arkansas, the company was founded by Sam Walton in 1962 
The company was listed on the New York Stock Exchange in 1972
Yeah,its a major franchise.  11,703 stores and clubs in 28countries, operating under 59 different name
The company operates under the name Walmart in the United States and Canada, as Walmart de México y Centroamérica in Mexico and Central America, as Asda in the United Kingdom, as the Seiyu Group in Japan, 
Yeah! Also,largest company by revenueapproximately US$480 billion according to the Fortune Global 500 list in 2016as well as the largest private employees