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Larry Page
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How'd he get so rich? Like his future business partner, Sergey Brin, Page was born the son of professors, but it wasn't until the two brainiacs met at Stanford that their fate was decided. In 1998 they founded Google, which would soon become the dominant Internet search engine and make them both billionaires many times over. Google has a market cap of $123.1 billion, and Page has a personal net worth estimated at $12 billion.

Learn more about Google (GOOG).