The Top 10 World's Richest Entrepreneurs

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4. Larry Ellison - $48 billion

One of the first entrepreneurs to give Silicon Valley its cachet, Larry Ellison is the co-founder of a company that would eventually be called Oracle Corporation. Today, he serves as the Redwood City, California-based enterprise software company's CEO. His fortune, at $48 billion, makes Ellison the fifth wealthiest person in the world, according to the latest Rich List.