S. Robson Walton

Samuel Robson "Rob" Walton (born October 28, 1944) is an American businessman. He is the heir to the fortune of Walmart, the world's largest retailer. He is the eldest son of Helen Walton and Sam Walton. He was Chairman of Walmart from 1992 to 2015. 
As of March 2020, Walton had a net worth of $54.1 billion, making him the 10th richest person in the world. He was born in Tulsa, Oklahoma.