Net Worth Calculated March 2012RankNameNet WorthAgeSourceCountry of Citizenship1Carlos Slim Helu & family$69 B72telecomMexico2Bill Gates$61 B56MicrosoftUnited States3Warren Buffett$44 B81Berkshire HathawayUnited States4Bernard Arnault$41 B63LVMHFrance5Amancio Ortega$37.5 B75ZaraSpain6Larry Ellison$36 B67OracleUnited States7Eike Batista$30 B55mining, oilBrazil8Stefan Persson$26 B64H&MSweden9Li Ka-shing$25.5 B83diversifiedHong Kong10Karl Albrecht$25.4 B92AldiGermany11Christy Walton & family$25.3 B57Wal-MartUnited States12Charles Koch$25 B76diversifiedUnited States12David Koch$25 B71diversifiedUnited States14Sheldon Adelson$24.9 B78casinosUnited States15Liliane Bettencourt$24 B89L'OrealFrance16Jim Walton$23.7 B64Wal-MartUnited States17Alice Walton$23.3 B62Wal-MartUnited States18S. Robson Walton$23.1 B68Wal-MartUnited States19Mukesh Ambani$22.3 B54petrochemicals, oil & gasIndia20Michael Bloomberg$22 B70Bloomberg LPUnited States21Lakshmi Mittal$20.7 B61steelIndia22George Soros$20 B81hedge fundsUnited States23Michele Ferrero & family$19 B85chocolatesItaly24Sergey Brin$18.7 B38GoogleUnited States24Larry Page$18.7 B39GoogleUnited States26Jeff Bezos$18.4 B48Amazon.comUnited States27Thomas & Raymond Kwok & family$18.3 B0real estateHong Kong28Alisher Usmanov$18.1 B58steel, telecom, investmentsRussia29Prince Alwaleed Bin Talal Alsaud$18 B57investmentsSaudi Arabia29Lee Shau Kee$18 B84diversifiedHong Kong29Georgina Rinehart$18 B58MiningAustralia32Berthold & Theo Jr. Albrecht$17.8 B0Aldi, Trader Joe'sGermany32Iris Fontbona & family$17.8 B69miningChile34Michael Otto & family$17.6 B68retail, real estateGermany35David Thomson & family$17.5 B54mediaCanada35Mark Zuckerberg$17.5 B27FacebookUnited States37Ricardo Salinas Pliego & family$17.4 B56retail, mediaMexico38Alberto Bailleres Gonzalez & family$16.5 B80miningMexico39Rinat Akhmetov$16 B45steel, coalUkraine39Cheng Yu-tung$16 B86diversifiedHong Kong41Michael Dell$15.9 B47DellUnited States41Vladimir Lisin$15.9 B55steel, transportRussia41Azim Premji$15.9 B66softwareIndia44Steve Ballmer$15.7 B56MicrosoftUnited States45Alexei Mordashov$15.3 B46steel, investmentsRussia46Vladimir Potanin$14.5 B51metalsRussia47Phil Knight$14.4 B74NikeUnited States48Paul Allen$14.2 B59Microsoft, investmentsUnited States48German Larrea Mota Velasco & family$14.2 B58miningMexico50Carl Icahn$14 B76leveraged buyoutsUnited States50Birgit Rausing & family$14 B88packagingSweden52Forrest Mars Jr$13.8 B80candyUnited States52Jacqueline Mars$13.8 B72candyUnited States52John Mars$13.8 B75candyUnited States52Joseph Safra$13.8 B73bankingBrazil56Vagit Alekperov$13.5 B61LukoilRussia57Mikhail Fridman$13.4 B47oil, banking, telecomRussia58Mikhail Prokhorov$13.2 B46investmentsRussia59Susanne Klatten$13 B49BMW, pharmaceuticalsGermany59Francois Pinault & family$13 B75retailFrance61Mohammed Al Amoudi$12.5 B67oil, diversifiedSaudi Arabia61Anne Cox Chambers$12.5 B92mediaUnited States61John Paulson$12.5 B56hedge fundsUnited States64Robert Kuok$12.4 B88diversifiedMalaysia64Luis Carlos Sarmiento$12.4 B79bankingColombia64Viktor Vekselberg$12.4 B54oil, metalsRussia67Antonio Ermirio de Moraes & family$12.2 B83diversifiedBrazil68Roman Abramovich$12.1 B45steel, investmentsRussia69Donald Bren$12 B79real estateUnited States69Jorge Paulo Lemann$12 B72beerBrazil69Ronald Perelman$12 B69leveraged buyoutsUnited States72Len Blavatnik$11.9 B54div