Sheldon Adelson (net worth: $29.4 billion)

A father of five children, Adelson is the chairman and majority shareholder of Las Vegas Sands, the world’s largest casino operator. The Las Vegas-based business controls casino resorts and convention centers in the U.S. and Asia. He owns more than half of the publicly traded company, which had revenue of $11.7 billion in 2015 and 50,000 employees.