1. Carlos Slim (Mexico) – $74 billion, telecommunications
América Móvil, which at 2010 was Latin America’s largest mobile-phone carrier, accounted for around US$49 billion of his wealth by the end of 2010. His corporate holdings at February 2011 have been estimated at US$74 billion and from these estimates he is the wealthiest person in the world.
2. Bill Gates (USA) – $56 billion, Microsoft
Gates is one of the best-known entrepreneurs of the personal computer revolution. Although he is admired by many, a number of industry insiders criticize his business tactics, which they consider anti-competitive, an opinion which has in some cases been upheld by the courts. In the later stages of his career, Gates has pursued a number of philanthropic endeavors, donating large amounts of money to various charitable organizations and scientific research programs through the Bill & Melinda Gates Foundation, established in 2000.
Bill Gates stepped down as chief executive officer of Microsoft in January 2000. He remained as chairman and created the position of chief software architect. In June 2006, Gates announced that he would be transitioning from full-time work at Microsoft to part-time work and full-time work at the Bill & Melinda Gates Foundation. He gradually transferred his duties to Ray Ozzie, chief software architect and Craig Mundie, chief research and strategy officer. Gates' last full-time day at Microsoft was June 27, 2008. He remains at Microsoft as non-executive chairman.
3. Warren Buffett (USA) – $50 billion, Berkshire Hathaway
Buffett is called the "Oracle of Omaha" or the "Sage of Omaha" and is noted for his adherence to the value investing philosophy and for his personal frugality despite his immense wealth. Buffett is also a notable philanthropist, having pledged to give away 99 percent of his fortune to philanthropic causes, primarily via the Gates Foundation. He also serves as a member of the board of trustees at Grinnell College.
4. Bernard Arnault (France) – $41 billion, LVMH
5. Larry Ellison (USA) – $39.5 billion, Oracle Corp
6. Lakshmi Mittal (India) – $31.1 billion, steel
Mittal is the second richest man in Europe and is presently the sixth richest in the world with a personal wealth of US$31.1 billion or £23.8 billion.He is the 44th most powerful person of the 68 most powerful people in the world. One out of 5 cars in the world is made up of the steel materials of his steel empire. His daughter Vanisha Mittal's marriage was the most expensive in the recorded history of the world.
He is a independent director of Goldman Sachs, member of the Board of Directors of European Aeronautic Defence and Space Company, World Steel Association, Foreign Investment Council in Kazakhstan, the International Investment Council in South Africa, the Investors' Council to the Cabinet of Ministers of Ukraine, the World Economic Forum’s International Business Council, the World Steel Association's Executive Committee, the Presidential International Advisory Board of Mozambique and the International Iron and Steel Institute’s Executive Committee.
He also presently serves as a board council member of the Prime Minister of India's Global Advisory Council of Overseas Indians. and members in the Advisory Board of the Kellogg School of Management, Executive Board at Indian School of Business and St. Xavier's College, Calcutta Alumni Association, London Chapter.
In 2006, Financial Times named him "Person of the Year". In 2007, Time magazine included him in their "100 most influential persons in the world".
7. Armancio Ortega (Spain) – $31 billion, retail
Amancio Ortega Gaona (born March 28, 1936) is a Spanish fashion entrepreneur. He is the founder, along with his then-wife Rosalía Mera, and chairman of the Inditex Group. He is ranked by Forbes as Spain's richest man; Europe's second richest man; and the seventh richest man in the world in 2011. He currently lives with his second wife in a discreet apartment building in the centre of A Coruña.
Ortega arrived at A Coruña, Spain, at the age of 14, due to the job of his father, a railway worker. Starting as a gofer in various shirt stores in A Coruña, Galicia, in 1972 he founded Confecciones Goa (his initials in reverse), which made bathrobes. In 1975 he opened the first store in what would grow into the enormously popular chain of fashion stores called Zara. He owns 59.29% of the Inditex group (Industrias de Diseño Textil Sociedad Anónima) which includes the brands Zara, Massimo Dutti, Oysho, Zara Home, Kiddy's Class, Tempe, Stradivarius, Pull and Bear/Often and Bershka and has more than 14,000 employees.
Ortega keeps a very low profile and there are practically no photographs of him (except from one photo published at the Inditex website). He refuses to wear a tie, and likes to dress in blue jeans and T-shirts. He is said to take a very active part in the production and design process in the company.
When he made a public appearance in 2000 - as part of the warm-up prior to floating his company on the stock market in 2001 - it made headlines in the Spanish financial press. However, he has never given an interview, and his secrecy has led to the publication of books such as Amancio Ortega: DE CERO A ZARA (From Zero to Zara).
Ortega, announced his imminent retirement from the fast-fashion giant Inditex, parent company of the Zara chain, stating that he will ask Inditex vice-president and CEO Pablo Isla to take his place at the helm of the textile empire.
8. Eike Batista (Brazil) – $30 billion, mining, oil
9. Mukesh Ambani (India) – $27 billion, petrochemicals, oil and gas
He is a member of the board of director of Bank of America Corporation and a present member of the international advisory board of Council on Foreign Relations.
In 2010, he was named among the most powerful people in the world by Forbes in its list of "68 people who matter most" As of 2011, he is the second richest man in Asia and the ninth richest man in the world with a personal wealth of US$27 billion. In 2007, a strong rally in the Indian stock market and the appreciation of the Indian rupee boosted the market capitalisation of Reliance group companies, briefly making him the world’s richest man. According to Forbes Magazine forecasts, he is expected to regain the title of the richest man in the world in 2014
10. Christy Walton (USA) – $26.5 billion, Wal-Mart
Christy Ruth Walton (born 1955) is the widow of John T. Walton, who was a son of Sam Walton, the founder of Wal-Mart. After John's death in June 2005, she inherited his fortune of $15.7 billion.
As of 2011, she is the 4th richest person in the United States according to Forbes Magazine and the 10th richest person in the world. As of March 2011, she had an estimated net worth of US$ 26.5 billion, the bulk of which comes from her shares in Wal-Mart, but also from First Solar, in which her late husband invested. She is currently the richest woman in the world.
She currently resides in Jackson, Wyoming and has one son, Lukas.