Occupation: Executive chairman, CME Group
At the beginning of 2013, the head of the world’s largest futures exchange faced stiff competition from rival exchanges. The South Side native fought hard, introducing 162 new products, and won: Over the year, the firm’s total volume grew 10 percent (three billion contracts worth $1 quadrillion were traded), and its share price rose nearly 27 percent for the year ending January 31, handily outperforming the S&P. Is he done? Hardly. Duffy is awaiting regulatory approval for CME Europe, a new London-based derivatives exchange.