David Koch

• Executive Vice President, Koch Industries
• Age: 73
• Source of Wealth: diversified, inherited and growing
• Residence: New York, NY
• Country of Citizenship: United States
• Education: Master of Science, Massachusetts Institute of Technology; Bachelor of Arts / Science, Massachusetts Institute of Technology
• Marital Status: Married
• Children: 3

Profile

The world's richest brothers head the nation's second biggest private company with $115 billion in sales. Koch Industries owns firms that are involved in refinery, chemicals and financial trading, among many others.

Charles Koch

• CEO, Koch Industries
• Age: 78
• Source of Wealth: diversified, inherited and growing
• Residence: Wichita, KS
• Country of Citizenship: United States
• Education: Master of Science, Massachusetts Institute of Technology; Bachelor of Arts / Science, Massachusetts Institute of Technology
• Marital Status: Married
• Children: 2

Profile

The world's richest brothers head the nation's second biggest private company with $115 billion in sales. Koch Industries owns firms that are involved in refinery, chemicals and financial trading, among many others.

Li Ka-shing

• Chairman, Hutchison Whampoa
• Age: 85
• Source of Wealth: diversified, self-made
• Residence: Hong Kong, Hong Kong
• Country of Citizenship: Hong Kong
• Education: Drop Out, High School
• Marital Status: Widowed
• Children: 2

Profile

Li Ka-shing was an early backer of Facebook and Spotify. He's invested in BitPay, provider of Bitcoin payment services, and Misfit Wearables, which makes motion tracker Shine and was co-founded by former Apple CEO John Sculley.

Michael Bloomberg

• Mayor, New York City, United States
• Age: 71
• Source of Wealth: Bloomberg LP, self-made
• Residence: New York, NY
• Country of Citizenship: United States
• Education: Bachelor of Arts / Science, Johns Hopkins University; Master of Business Administration, Harvard Business School
• Marital Status: In Relationship
• Children: 2

                     Profile

The world's richest mayor Michael Bloomberg relinquishes control of New York City in December, after 12 years shaping everything in the Big Apple. As he exits, Bloomberg has taken steps to extend his political influence into the national debate around gun control. That influence is better financed than ever, with his personal fortune up $6 billion since last year, thanks to the performance of Bloomberg LP, the financial data firm he founded in 1982.

Manmohan Singh

• Prime Minister, India
• Age: 81
• Residence: New Delhi, India
• Country of Citizenship: India
• Marital Status: Married
• Children: 3

                                                Profile

  Indian PM Singh is an Oxford- and Cambridge-educated economist credited with shaping India's economic and social welfare reforms. Singh's quiet intellectualism renders him a timid public figure.