Microsoft Corp Chairman Bill Gates answers questions during an interview January 21, 2014 in New York. Gates will work on philanthropy full time for the rest of his life and contribute part time as a board member of the software maker. In the Bill and Melinda Gates Foundation's annual letter, he celebrated the progress that poorer countries have been making, and dismissed it as a myth that those countries cannot become wealthier. AFP PHOTO/Don Emmert (Photo credit should read DON EMMERT/AFP/Getty Images)1. $76 Billion - Bill Gates (Microsoft founder) (Credit: DON EMMERT/AFP/Getty Images)
Mexican tycoon Carlos Slim participates in a press conference at the Soumaya Museum in Mexico City on January 29, 2014. The Slim Foundation signed an agreement with Coursera plataform to expand the acces and the opportunities of education and employment in Latin America. AFP PHOTO/ Yuri CORTEZ (Photo credit should read YURI CORTEZ/AFP/Getty Images)2. $72 Billion - Carlos Slim Helu (Telecom) (Credit: YURI CORTEZ/AFP/Getty Images)
Global Champion Tour 2012 In Monte Carlo - Day 2
MONTE-CARLO, MONACO - JUNE 29: Amancio Ortega attends the Monaco International Jumping as part of Global Champion Tour on June 29, 2012 in Monte-Carlo, Monaco. (Photo by Pascal Le Segretain/Getty Images)3. $64 Billion - Amanecio Ortega (Retail) (Credit: Pascal Le Segretain/Getty Images)
Warren Buffet And Goldman Sachs CEO Lloyd Blankfein Speak On Goldman's Detroit Investment Initiative
DETROIT, MI -Warren Buffett, Chairman and CEO of Berkshire Hathaway and Co-Chairman of Goldman Sachs 10,000 Small Businesses Program, attends a press conference at which Detroit was named the 11th city to be included in the $500 million Goldman Sachs initiative at Ford Field November 26, 2013 in Detroit, Michigan. Under the program, small businesses in Michigan will be eligible to receive $20 million in loans. The initiative was designed to help small business entrepreneurs create jobs and grow their businesses.(Photo by Bill Pugliano/Getty Images)4. $58.2 Billion - Warren Buffett (Investor) (Photo by Bill Pugliano/Getty Images)
Oracle CEO Larry Ellison speaks during a media conference after Oracle Team USA won the 34th America's Cup on September 25, 2013 in San Francisco. AFP PHOTO/Josh Edelson (Photo credit should read Josh Edelson/AFP/Getty Images)5. $48 Billion - Larry Ellison (Oracle founder) (Credit: Josh Edelson/AFP/Getty Images)
Metropolitan Opera Season Opening Production Of "Eugene Onegin"
<> the Metropolitan Opera Season Opening Production Of "Eugene Onegin" at The Metropolitan Opera House on September 23, 2013 in New York City.6. $40 Billion - David Koch (Diversified) (Credit: Getty Images)
Koch-Industries-Logo 6. $40 Billion - Charles Koch (Diversified) (Credit: Koch Industries, Inc.)
Obama And Romney Square Off In First Presidential Debate In Denver
during the Presidential Debate at the University of Denver on October 3, 2012 in Denver, Colorado. The first of four debates for the 2012 Election, three Presidential and one Vice Presidential, is moderated by PBS's Jim Lehrer and focuses on domestic issues: the economy, health care, and the role of government.8. $38 Billion - Sheldon Adelson (Casinos) (Credit: Getty Images)
28th Annual Imagen Awards - Inside
<> at The Beverly Hilton Hotel on August 16, 2013 in Beverly Hills, California.9. $36.7 Billion - Christy Walton (Walmart) (Credit: Getty Images)
Jim_Walton 10. $34.7 Billion - Jim Walton (Walmart) (Credit: Walmart Corporate/Flickr) For the rest of the list, click here.