Carlos Slim HeluForbes Ranking 1

Billionaire: Carlos Slim Helu and family 

Wealth: $74 billion  

Citizenship: Mexico  

Residence: Mexico  

Source of Wealth: Telmex, América Móvil 

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Bill GatesForbes Ranking 2

Billionaire: William Henry Gates III 

Wealth: $56 billion  

Citizenship: USA  

Residence: USA  

Source of Wealth: Microsoft  

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Warren BuffettForbes Ranking 3

Billionaire: Warren Buffett 

Wealth: $50 billion  

Citizenship: USA  

Residence: USA  

Source of Wealth: Berkshire Hathaway 

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Lakshmi MittalForbes Ranking 6

Billionaire: Lakshmi Mittal  

Wealth: $31.1 billion  

Citizenship: India  

Residence: United Kingdom  

Source of Wealth: Arcelor Mittal  

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Eike Batista  

Forbes Ranking 8

Billionaire: Eike Batista

Wealth: $30 billion 

Citizenship: Brazil 

Residence: Brazil 

Source of Wealth: EBX Group  

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Mukesh AmbaniForbes Ranking 9

Billionaire: Mukesh Ambani  

Wealth: $27 billion   

Citizenship: India   

Residence: India   

Source of Wealth: Reliance Industries  

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Li Ka shing

Forbes Ranking 11

Billionaire: Li Ka shing  

Wealth: $26 billion   

Citizenship: Hong Kong   

Residence: Hong Kong   

Source of Wealth: diversified  

John Paulson

Forbes Ranking 39

Billionaire: John Paulson  

Wealth: $16 billion   

Citizenship: USA   

Residence: USA  

Source of Wealth: Paulson & Co.