Walmart is a multinational retail company which is operating a chain of grocery stores, discount department stores, and hypermarkets. Based in Arkansas, it currently has more than 11,300 locations with 55 different names in more than 25 countries. In 2018, Walmart is the largest firm in the world by revenue, with more than $500 billion. Also, it is the largest private employer with approximately 2.1 million employees. In the US, Walmart is the largest grocery retailer.