David Koch
Net Worth: US$36 billion
Position: Executive Vice President, Koch Industries
Age: 73
Source of Wealth: diversified, inherited and growing
Residence: New York, NY
Country of Citizenship: United States
Education: Bachelor of Arts / Science, Massachusetts Institute of Technology; Master of Science, Massachusetts Institute of Technology
Marital Status: Married
Children: 3
Forbes 400 ranking in 2012: No. 4