World's Billionaires 2011

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No. 3 Warren Buffett

Net Worth: $50 billion ↑
Source: Berkshire Hathaway
Citizenship: U.S.

The venerable investor's Berkshire Hathaway climbed more than 15% over the last year, adding $3 billion to his fortune. The 80-year-old is still hunting big deals:

More at Forbes.com: • The Richest People in the World • The World's Youngest Billionaires 2011 • Notable Newcomer Billionaires 2011

"Our elephant gun has been reloaded, and my trigger finger is itchy." Along with bridge partner Bill Gates, the Oracle of Omaha is coaxing America's richest to pledge half their fortunes to charity. "Too often a vast collection of possessions ends up possessing its owner. The asset I most value, aside from health, is interesting, diverse and long-standing friends." Buffett faked breathing problems when he was 12 so he could move back to Omaha from Washington, D.C., where his father was a freshman congressman. He had read every book about investing in stocks in the Omaha Public Library by the time he was 12. He met value investor Benjamin Graham at Columbia; bought textile firm Berkshire Hathaway in 1965, and transformed it into massive holding company: food, insurance, utilities, industrials. Buffett acquired railroad giant Burlington Northern Santa Fe for $26 billion in 2009.

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No. 4 Bernard Arnault

Net Worth: $41 billion ↑
Source: LVMH
Citizenship: France

The Lord of Luxe easily retains title of richest European. Fortune surged by $13.5 billion as shares of his luxury goods outfit, LVMH, rose by more than half over the past year thanks to strong demand for luxuries like Dom Perignon champagne, Cognac Hennessy, Tag Heuer watches and Louis Vuitton accessories, particularly in Asian markets like Shanghai and Ho Chi Minh City. The group acquired 20% of Hermes last year; Arnault insists he is a friendly shareholder but Hermes sees it as hostile. In March the Bulgari family transferred its majority holding in its brand to LVMH in exchange for LVMH shares and board seats. LVMH fired Christian Dior designer John Galliano after he apparently made anti-Semitic remarks. Renaissance man also owns yacht builder Royal Van Lent, a hotel in Courchevel; has stakes in French retailer Carrefour and French tour operator Go Voyages.

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No. 5 Larry Ellison

Net Worth: $39.5 billion ↑
Source: Oracle
Citizenship: U.S.

The Oracle chief sits atop a fortune that is $11.5 billion bigger than last year thanks to a 30% jump in the software company's shares. In November Oracle won a mud-slinging copyright infringement court battle against German software rival SAP worth $1.3 billion. SAP is contesting the outcome. Oracle has acquired 75 companies over the years worth $40 billion, and figured out a way to turn a profit on its latest big buy, Sun Microsystems, in 2010. One of the highest-paid executives in the U.S., Ellison reaped $960 million in compensation in the past five fiscal years, mostly from exercising stock options; he recently cut his salary to $1. An avid yachtsman, Ellison spent a decade and over $100 million on his quest for the America's Cup, which he finally won in February 2010, beating Swiss rival (and billionaire) Ernesto Bertarelli. He is bringing the America's Cup to San Francisco in 2013. Intends to give 95% of wealth to charity.

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No. 6 Lakshmi Mittal

Net Worth: $31.1 billion ↑
Source: Steel
Citizenship: India

Net profits at his ArcelorMittal, world's largest steelmaker, were up 18-fold to $2.9 billion in 2010 due to recovery in steel demand and higher margins. Group spun off its stainless steel unit into Aperam, a new listed company, and also acquired Canadian miner Baffinland Iron Mines. Funding a 377-foot sculpture called ArcelorMittal Orbit in London's Olympic Park for the 2012 Olympics. Europe's richest resident who lives in London, he bought Alderbrook Park, a 340-acre country estate outside of the city, where he plans to build an eco-friendly country mansion for a reported $40 million. Daughter Vanisha acquired stake in Roc Capital Management, a New York hedge fund. Daughter-in-law Megha owns German fashion house Escada.

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