Samuel Robson “Rob” Walton is the eldest son of Helen Walton and Sam Walton. His father was the founder of Walmart, the world’s largest retailer. He has three younger siblings; Jim Walton, Alice Walton, and John Walton. Just two days after his father passed away in 1992 Rob Walton succeeded him as chairman of the board of directors. He is ranked at #17 on the 2013 List of Billionaires. His net worth was $37.6 billion as of March 3, 2015.