1. Carlos Slim Helu & family 
Net Worth: $73 billion
Source of wealth: Telecom
Country: Mexico

2. Bill Gates 
Net worth: 67 billion
Source of wealth: Microsoft, investments
Country: United States

3. Amancio Ortega
Net worth: 57 billion
Source of wealth: Zara
Country: Spain

4. Warren Buffett
Net Worth: 53.5 billion
Source of wealth: Berkshire Hathaway
Country: United States

5. Larry Ellison
Net worth: $43 billion
Source of wealth: Oracle
Country: United States

6. Charles Koch
Net worth: $34 billion
Source of wealth: diversified
Country: United States

6. David Koch
Net worth: $34 billion
Source of wealth: diversified
Country: United States

8. Li Ka-shing
Net worth: $31 billion
Source of wealth: diversified
Country: Hong Kong

9. Liliane Bettencourt
Net worth: $30 billion
Source of Wealth L’Oreal
Country: France

10. Bernard Arnault 
Net worth: $29 billion
Source of wealth: LVMH
Country: France