Age: 59
Occupation: CEO, Fiat and Chrysler
Marchionne calls himself a corporate nomad, but he will always be welcome in Auburn Hills, Mich. That's where Chrysler is headquartered — and where it almost perished until Fiat bought the company with the help of the U.S. government in 2008 and the Italo-Canadian businessman led an unprecedented turnaround. Today Chrysler is profitable, saving upwards of 40,000 jobs, its bailout loans have been paid off, and Marchionne ranks as one of the business world's stars.