3. Larry Ellison

•     Net Worth: $41 B                                                                      
•     Source of Wealth: Oracle                                                            
•     Citizen: United States
•     Age: 69

CEO and co founder of Oracle Cooperation, Larry Ellison with a net worth of $39.5 billion is the fifth richest person in the world. Ellison collects houses on Malibu's Carbon Beach and also owns of 98% of Hawaii's Lanai island. In his quest for youth he has donated $445 million to his medical foundation to support research on aging and age-related diseases.