- Net Worth in US Dollars: $40.0 Billion
- Furtune: Self Made
- Source: Microsoft
- Industry: Software
- Citizenship: United States of America
2. Warren Buffett
- Net Worth in US Dollars: $37 Billion
- Furtune: Self Made
- Source: Berkshire Hathaway
- Industry: Investments
- Citizenship: United States of America
- Net Worth in US Dollars: $35 Billion
- Furtune: Self Made
- Source: telecom
- Industry: Communication
- Citizenship: Mexico
- Net Worth in US Dollars: $22.5 Billion
- Furtune: Self Made
- Source: Oracle Corporation
- Industry: Software
- Citizenship: United States of America
- Net Worth in US Dollars: $22.0 Billion
- Furtune: self made
- Source: Lkea
- Industry: Retail
- Citizenship: Sweden
- Net Worth in US Dollars: $21.5 Billion
- Furtune: self made
- Source: Aldi Sud
- Industry: Supermarkets
- Citizenship: Germany
- Net Worth in US Dollars: $19.5 Billion
- Furtune: inherited and growing
- Source: petrochemicals
- Industry: Manufacturing
- Citizenship: India
- Net Worth in US Dollars: $19.3 Billion
- Furtune: inherited and growing
- Source: steel
- Industry: Manufacturing
- Citizenship: India
- Net Worth in US Dollars: $18.8 Billion
- Furtune: self made
- Source: Aldi Nord
- Industry: Supermarkets
- Citizenship: Germany
- Net Worth in US Dollars: $18.3 Billion
- Furtune: self made
- Source: Inditext Group
- Industry: Fashion
- Citizenship: Spain
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Reference:
http://en.wikipedia.org/wiki/List_of_billionaires
http://www.forbes.com/2009/03/11/worlds-richest-people-billionaires-2009-billionaires_land.html