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Mon 12 Mar 2012 10:21 AM

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The world's top billionaires

US-based Forbes magazine has released its annual list of billionaires across the world. The entries' net worth is calculated as of March 2012

The world's top billionaires
50 Carl Icahn Net worth: $14bn Source of wealth: Leveraged buyouts Age: 76 Country: USA
The world's top billionaires
50 Birgit Rausing and family Net worth: $14bn Source of wealth: Packaging Age: 88 Country: Sweden
The world's top billionaires
48 Paul Allen Net worth: $14.2bn Source of wealth: Microsoft, investments Age: 59 Country: USA
The world's top billionaires
48 German Larrea Mota Velasco and family Net worth: $14.2bn Source of wealth: Mining Age: 58 Country: Mexico
The world's top billionaires
47 Phil Knight Net worth: $14.4bn Source of wealth: Nike Age: 74 Country: USA
The world's top billionaires
46 Vladimir Potanin Net worth: $14.5bn Source of wealth: Metals Age: 51 Country: Russia
The world's top billionaires
45 Alexei Mordashov Net worth: $15.3bn source of wealth: Steel, investments Age: 46 Country: Russia
The world's top billionaires
44 Steve Ballmer Net worth: $15.7bn Source of wealth: Microsoft Age: 56 Country: USA
The world's top billionaires
41 Michael Dell Net worth: $15.9bn Source of wealth: Dell Age: 47 Country: USA
The world's top billionaires
41 Vldimir Lisin Net worth: $15.9bn Source of wealth: Steel, transport Age: 55 Country: Russia
The world's top billionaires
41 Azim Premji Net worth: $15.9bn Source of wealth: Software Age: 66 Country: India
The world's top billionaires
39 Cheng Yu-tung Net worth: $16bn Source of wealth: Diversified Age: 86 Country: Hong Kong
The world's top billionaires
39 Rinat Akhmetov Net worth: $16bn Source of wealth: steel, coal Age: 45 Country: Russia
The world's top billionaires
38 Alberto Bailleres Gonzalez and family new worth: $16.5bn Source of wealth: Mining Age: 80 Country: Mexico
The world's top billionaires
37 Ricardo Salinas Pliego and family Net worth: $17.4bn Source of wealth: Retail, media Age: 56 Country: Mexico
The world's top billionaires
35 David Thomson and family Net worth: $17.5bn Source of wealth: Media Age: 54 Country: Canada
The world's top billionaires
35 Mark Zuckerberg Net worth: $17.5bn Source of wealth: Facebook Age: 27 Country: USA
The world's top billionaires
34 Michael Otto and family Net worth: $17.6bn Source of wealth: Retail, real estate Age: 68 Country: Germany
The world's top billionaires
Berthold and Theo Albrecht Jr Net worth: $17.8bn Source of wealth: ALDI stores Country: Germany
The world's top billionaires
32 Iris Fontbona and family Net worth: $17.8bn Source of wealth: Mining Age:69 Country: Chile
The world's top billionaires
29 Lee Shau Kee Net worth: $18bn Source of wealth: Diversified Age: 84 Country: Hong Kong
The world's top billionaires
29 Georgina Rinehart Net worth: $18bn Source of wealth: Mining Age: 58 Country: Australia
The world's top billionaires
29 HRH Prince Alwaleed Bin Talal Alsaud Net worth: $21.3bn Source of wealth: Investments Age: 57 Country: Saudi Arabia\n\n(Figures from Prince Alwaleed's private office)
The world's top billionaires
28 Alisher Usmanov Net worth: $18.1bn Source of wealth: Steel, telecoms and investments Age: 58 Country: Russia
The world's top billionaires
27 Thomas Kwok (right) and Raymond Kwok (left) and family Net worth: $18.3bn Source of wealth: Real estate Country: Hong Kong
The world's top billionaires
26 Jeff Bezos Net worth: $18.4bn Source of wealth: Amazon.com Age: 48 Country: USA
The world's top billionaires
24 Sergey Brin Net worth: $18.7bn Source of wealth: Google Age: 38 Country: USA
The world's top billionaires
24 Larry Page Net worth: $18.7bn source of wealth: Google Age: 39 Country: USA
The world's top billionaires
23 Michele Ferrero (centre) with sons Pietro, (right), and Giovanni (left) Net worth: $19bn Source of wealth chocolates Age: 85 Country: Italy
The world's top billionaires
22 George Soros Net worth: $20bn Source of wealth: Hedge funds Age: 81 Country: USA
The world's top billionaires
21 Lakshmi Mittal Net worth: $20.7bn Source of wealth: steel Age: 61 Country: India
The world's top billionaires
29 Michael Bloomberg Net worth: $22bn Source of wealth: Bloomberg LP Age: 70 Country: USA
The world's top billionaires
19 Mukesh Ambani Net worth: $22.3bn Source of wealth: Petrochemicals, oil and gas Age: 54 Country: India
The world's top billionaires
18 S Robson Walton Net worth: $23.1bn Source of wealth: Wal-Mart stores Age: 68 Country: USA
The world's top billionaires
17 Alice Walton Net worth: $23.3bn Source of wealth: Wal-Mart stores Age: 62 Country: USA
The world's top billionaires
16 Jim Walton Net worth: $23.7bn Source of wealth: Wal-Mart stores Age: 64 Country: USA
The world's top billionaires
15 Liliane Bettencourt Net worth: $24bn Source of wealth: L'Oreal Age:89 Country: France
The world's top billionaires
14 Sheldon Alderson Net worth: $24.9bn Source of wealth: Casinos Age: 78 Country: USA
The world's top billionaires
12 David Koch Net worth: $25bn Source of wealth: Diversified Country: USA
The world's top billionaires
12 Charles Koch Net worth: $25bn Source of wealth: Diversified Age: 76 Country: USA
The world's top billionaires
11 Christy Walton and family Net worth: $25.3bn Source of wealth: Wal-Mart stores Age: 57 Country: USA
The world's top billionaires
10 Karl Albrecht Net worth: $25.4bn Source of wealth: Owner of Germany-based supermarket chain ALDI Age: 92 Country: Germany
The world's top billionaires
9 Li Ka-shing Net worth: $25.5bn Age: 83 Source of wealth: Diversified Country: Hong Kong
The world's top billionaires
8 Stefan Persson Net worth: $26bn Age: 64 Source of wealth: H&M Country: Sweden
The world's top billionaires
7 Eike Batista Net worth: $30bn Age: 55 Source of wealth: Mining Country: Brazil
The world's top billionaires
6 Larry Ellison Net worth: $36bn Age: 67 Source of wealth: Oracle Country: USA
The world's top billionaires
5 Amancio Ortega Net worth: $37.5bn Age: 75 Source of wealth: Zara Country: Spain
The world's top billionaires
4 Bernard Arnault Net worth: $41bn Age: 63 Source of wealth: LVMH Country: France
The world's top billionaires
3 Warren Buffett Net worth: $44bn Age: 81 Source of wealth: Berkshire Hathaway country: USA
The world's top billionaires
2 Bill Gates Net worth: $61bn Age: 56 Source of wealth: Microsoft Country: USA
The world's top billionaires
1 Carlos Slim Helu and family Net worth: $69bn Age: 72 Source of wealth: Telecoms Country: Mexico