2. Amancio Ortega Net Worth: $67 B Source of wealth: Zara

3. Warren Buffett Net Worth: $60.8 B Source of wealth: Berkshire Hathaway

4. Carlos Slim Helu Net Worth: $50 B Source of wealth: telecom

5. Jeff Bezos Net Worth: $45.2 B Source of wealth: Amazon.com

6. Mark Zuckerberg Net Worth: $44.6 B Source of wealth: Facebook

7. Larry Ellison Net Worth: $43.6 B Source of wealth: Oracle

8. Michael Bloomberg Net Worth: $40 B Source of wealth: Bloomberg LP

9. Charles Koch Net Worth: $39.6 B Source of wealth: diversified

10. David Koch Net Worth: $39.6 B Source of wealth: diversified