Walmart heir Rob Walton is stepping down from the retailer's board after four decades

• Rob Walton, eldest son of Walmart founder Sam Walton, is stepping down from the company's board.
• He first joined Walmart in 1969 and has served on the board for more than 40 years.
• The company said Walton "helped shape some of the most important moments in Walmart history."

Rob Walton, eldest son of Walmart founder Sam Walton's three children, is stepping down from the company's board of directors in June.