Billionaire investor Warren Buffett and Microsoft Corp. founder Bill Gates were approached by a family representative to gauge their interest.

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Bill Gates Foundation sold out his holdings in Comcast Corp.

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Bill Gates Foundation sold out his holdings in CSX Corp.

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It is Bill Gates, the co-founder and former chief executive of Microsoft Corp.

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Son, the 41-year-old founder and president of Softbank Corp. of Japan, is not as famous as his pals Bill Gates of Microsoft or Jerry Yang of Yahoo, but he has carved out a larger chunk of the Internet economy than either of them--larger than anyone else on the planet, he claims.

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The wireless networking company, which came in No. 9 in the 2010 ranking, benefits partly from the background of its founder, Dirk Gates, who took his previous company, Xircom, public before selling it to Intel Corp.

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