Walmart is led by CEO Michael T. Duke. The Chairman is S. Robson Walton, son of founder Sam Walton. John Fleming is the CMO, credited with building up Walmart's online business. H. Lee Scott is President and has been with the company since 1979. Frank Yiannas oversees global food safety as Walmart looks to add nearly 365 new stores and clubs in the US each year through continued expansion of its discount store portfolio.