Home Depot co-founder Ken Langone’s path to success was straight out of a business school textbook. He studied economics at Bucknell University, earned his M.B.A. at the New York University Stern School of Business and went to work on Wall Street. In 1974 he launched his own investment firm, Invemed Associates, where he helped secure financing for what would become Home Depot. Today, he is worth $3.3 billion.

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