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Greg Wasson

Age: 55

Occupation: CEO, Walgreen Co.

Last year his $72 billion pharmacy chain opened up 186 new stores and snagged some of the highest-profile retail spots in Chicago (seen the corner of Damen and Milwaukee lately?). Now Wasson, whose company filled 19 percent of U.S. prescriptions in 2013, is reportedly focused on items that help customers stay well, pushing for a widespread rollout of fresh produce and more preventative services, such as in-store immunizations.