Net Worth: $26.6 billion
Wealth source: Wal-Mart
Residence: Bentonville, Ark.
World Ranking: 15th
The eldest Walton son has been chairman of the retailer since his father Sam Walton’s death 20 years ago. He and his siblings own a 47 percent stake in the company, and he individually owns around 339 million shares. Mr. Walton holds a law degree from Columbia University.