Forbes Top 100 World's Billionaires

Below is a list of Forbes Top 100 World Billionaires with net worth calculated as of March 2012. The richest of the richest.

1. Carlos Slim Helu & family
$69 B, 72 y/o, telecom - Mexico

2. Bill Gates

$61 B, 56 y/o, Microsoft - United States

3. Warren Buffett

$44 B, 81 y/o, Berkshire Hathaway - United States

4. Bernard Arnault

$41 B, 63 y/o, LVMH - France

5. Amancio Ortega

$37.5 B, 75 y/o, Zara - Spain

6. Larry Ellison

$36 B,67 y/o, Oracle - United States

7. Eike Batista

$30 B, 55 y/o, mining, oil - Brazil

8. Stefan Persson

$26 B, 64 y/o, H&M - Sweden

9. Li Ka-shing

$25.5 B, 83 y/o, diversified - Hong Kong

10. Karl Albrecht

$25.4 B, 92 y/o, Aldi - Germany

11. Christy Walton & family

$25.3 B, 57 y/o, Wal-Mart - United States

12. Charles Koch

$25 B, 76 y/o, diversified - United States

13. David Koch

$25 B, 71 y/o, diversified - United States

14. Sheldon Adelson

$24.9 B, 78 y/o, casinos - United States

15. Liliane Bettencourt

$24 B, 89 y/o, L'Oreal - France

16. Jim Walton

$23.7 B, 64 y/o, Wal-Mart - United States

17. Alice Walton

$23.3 B, 62 y/o, Wal-Mart - United States

18. S. Robson Walton

$23.1 B, 68 y/o, Wal-Mart - United States

19. Mukesh Ambani

$22.3 B, 54 y/o, petrochemicals, oil & gas - India

20. Michael Bloomberg

$22 B, 70 y/o, Bloomberg LP - United States

21. Lakshmi Mittal

$20.7 B, 61 y/o, steel - India

22. George Soros

$20 B, 81 y/o, hedge funds - United States

23. Michele Ferrero & family

$19 B,85y/o, chocolates - Italy

24. Sergey Brin

$18.7 B, 38 y/o, Google - United States

25. Larry Page

$18.7 B, 39 y/o, Google - United States

26. Jeff Bezos

$18.4 B, 48 y/o, Amazon.com - United States

27. Thomas & Raymond Kwok & family

$18.3 B, real estate - Hong Kong

28. Alisher Usmanov

$18.1 B, 58 y/o, steel, telecom, investments - Russia

29. Prince Alwaleed Bin Talal Alsaud

$18 B, 57 y/o, investments - Saudi Arabia

30. Lee Shau Kee

$18 B, 84 y/o, diversified - Hong Kong

31. Georgina Rinehart

$18 B, 58 y/o, Mining - Australia

32. Berthold & Theo Jr. Albrecht

$17.8 B, Aldi, Trader Joe's - Germany

33. Iris Fontbona & family

$17.8 B, 69 y/o, mining - Chile

34. Michael Otto & family

$17.6 B, 68 y/o, retail, real estate - Germany

35. David Thomson & family

$17.5 B, 54 y/o, media - Canada

36. Mark Zuckerberg

$17.5 B, 27 y/o, Facebook - United States

37. Ricardo Salinas Pliego & family

$17.4 B, 56 y/o, retail, media - Mexico

38. Alberto Bailleres Gonzalez & family

$16.5 B, 80 y/0, mining - Mexico

39. Rinat Akhmetov

$16 B, 45 y/o, steel, coal - Ukraine

39. Cheng Yu-tung

$16 B, 86 y/o, diversified - Hong Kong

41. Michael Dell

$15.9 B, 47 y/o, Dell - United States

41. Vladimir Lisin

$15.9 B, 55 y/o, steel, transport - Russia

41. Azim Premji

$15.9 B, 66 y/o, software - India

44. Steve Ballmer

$15.7 B, 56 y/o, Microsoft - -United States

45. Alexey Mordashov

$15.3 B, 46 y/o, steel, investments - Russia

46. Vladimir Potanin

$14.5 B, 51y/o, metals - Russia

47. Phil Knight

$14.4 B, 74 y/o, Nike - United States

48. Paul Allen

$14.2 B, 59 y/o, Microsoft, investments - United States

48. German Larrea Mota Velasco & family

$14.2 B, 58 y/o, mining - Mexico

50. Carl Icahn

$14 B, 76 y/o, leveraged buyouts - United States

50. Birgit Rausing & family

$14 B, 88y/o, packaging - Sweden

52. Forrest Mars Jr

$13.8 B, 80y/o, candy - United States

52. Jacqueline Mars

$13.8 B72candy - United States

52. John Mars

$13.8 B, 75y/o, candy - United States

52. Joseph Safra

$13.8 B, 73 y/o, banking - Brazil

56. Vagit Alekperov

$13.5 B, 61 y/o, Lukoil - Russia

57. Mikhail Fridman

$13.4 B, 47 y/o, oil, banking, telecom - Russia

58. Mikhail Prokhorov

$13.2 B, 46 y/o, investments - Russia

59. Susanne Klatten

$13 B, 49 y/o, BMW, pharmaceuticals - Germany

59. Francois Pinault & family

$13 B, 75 y/o, retail - France

61. Mohammed Al Amoudi

$12.5 B, 67 y/o, oil, diversified - Saudi Arabia

61. Anne Cox Chambers

$12.5 B, 92 y/o, media - United States

61. John Paulson

$12.5 B, 56 y/o, hedge funds - United States

64. Robert Kuok

$12.4 B, 88 y/o, diversified - Malaysia

64. Luis Carlos Sarmiento

$12.4 B, 79 y/o, banking - Colombia

64. Viktor Vekselberg

$12.4 B, 54 y/o, oil, metals - Russia

67. Antonio Ermirio de Moraes & family

$12.2 B, 83 y/o, diversified - Brazil

68. Roman Abramovich

$12.1 B, 45 y/o, steel, investments - Russia

69. Donald Bren

$12 B, 79 y/o, real estate - United States

69. Jorge Paulo Lemann

$12 B, 72 y/o, beer - Brazil

72 Ronald Perelman

$12 B, 69 y/o, leveraged buyouts - United States

72. Len Blavatnik

$11.9 B, 54 y/o, diversified - United States

72. Leonid Mikhelson

$11.9 B, 56 y/o, gas, chemicals - Russia

74. Leonardo Del Vecchio

$11.5 B, 76 y/o, eyewear - Italy

75. John Fredriksen

$11.3 B, 67 y/o, shipping - Cyprus

76. Aliko Dangote

$11.2 B, 54 y/o, sugar, flour, cement - Nigeria

78. Stefan Quandt

$11.2 B, 45 y/o, BMW - Germany

78. Gerald Cavendish Grosvenor & family

$11 B, 60y/o, real estate - United Kingdom

78. Harold Hamm

$11 B, 66 y/o, oil & gas - United States

80. Savitri Jindal & family

$10.9 B, 62 y/o, steel - India

81. Andrey Melnichenko

$10.8 B, 40 y/o, coal, fertilizers - Russia

82. James Simons

$10.7 B, 73 y/o, hedge funds - United States

84. Ernesto Bertarelli & family

$10.6 B, 46 y/o, biotech, investments - Switzerland

85. Jack Taylor & family

$10.4 B89Enterprise Rent-A-CarUnited States

85. Abigail Johnson

$10.3 B50FidelityUnited States

86. Robin Li

$10.2 B43TechnologyChina

86. Eliodoro, Bernardo & Patricia Matte

$10.2 B0paperChile

88. Ray Dalio

$10 B62hedge fundsUnited States

88. George Kaiser

$10 B69oil & gas, bankingUnited States

88. Johanna Quandt

88. $10 B85BMWGermany

88. Hans Rausing

$10 B86packagingSweden

88. Tadashi Yanai & family

$10 B, 63 y/o, retail - Japan

93. Serge Dassault & family

$9.9 B, 86 y/o, aviation - France

93. Ananda Krishnan

$9.9 B,73 y/o, telecoms - Malaysia

95. Klaus-Michael Kuhne

$9.8 B, 74 y/o, shipping - Germany

96. Pallonji Mistry

$9.7 B, 82 y/o, construction - Ireland

97. Alejandro Santo Domingo Davila

$9.5 B, 35 y/o, beer - Colombia

98. Horst Paulmann & family

$9.3 B, 77 y/o, retail - Chile

99. Gennady Timchenko

$9.1 B, 59 y/o, oil & gas - Russia

100. Laurene Powell Jobs & family

$9 B, 48 y/o, Apple, Disney - United States