In a world where retail is constantly changing and external factors like the internet are impacting how consumers shop, the top five retailers in America must fight for every dollar in order to keep Wall Street satisfied. Over the past several years, retail in America has changed dramatically. Target Corporation (NYSE:TGT) and Wal-Mart Stores, Inc. (NYSE:WMT) have entered the field of food through PFresh and the Supercenter, respectively, and Costco Wholesale Corporation (NASDAQ:COST) has continued to grow market share and loyalty within its markets, while simultaneously increasing its geographic footprint.