Washington, Sept 22 : Microsoft founder Bill Gates stays atop the annual Forbes list of the richest Americans, with wealth valued at 59 billion dollars.

Billionaire investor Warren Buffett, who also continued giving his wealth to good causes, dropped 11 billion dollars to 39 billion dollars as the value of his Berkshire Hathaway firm slid, and was placed second in the list.

Fellow investor George Soros also entered the top 10, with 22 billion dollars, the BBC reports.

Forbes list of world''s richest people includes:

Bill Gates-59billion dollars-Microsoft, software

Warren Buffett- 39 billion dollars-Berkshire Hathaway, investment

Larry Ellison-33 billion dollars-Oracle, software

Charles Koch-25 billion dollars-Koch Industries, diversified

David Koch-25 billion dollars-Koch Industries, diversified

Christy Walton-24.5 billion dollars-Wal-Mart, retail

George Soros-22 billion dollars-Quantum, hedge fund

Sheldon Adelson-21.5 billion dollars-Las Vegas Sands, casinos

Jim Walton- 21.1 billion dollars-Wal-Mart, retail

Alice Walton- 20.9 billion dollars-Wal-Mart, retail (ANI)