Market Cap: $220B
Carl Douglas “Doug” McMillon is an American businessman and is the president and chief executive officer (CEO) of Wal-Mart Stores, Inc. He sits on the retailer’s board of directors. Having first joined the company as a summer associate in high school, he became the company’s fifth CEO in 2014. He previously led the company’s Sam’s Club division, from 2005 to 2009, and Walmart International, from 2009 to 2013.