FORTUNE's annual ranking of America's leading businesswomen


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47. Heather Bresch
Heather Bresch
CEO
Mylan
2011 rank: New
Age: 43
After 20 years in 15 different roles, Bresch landed the $6 billion pharma's top spot. That's despite a 2008 controversy at West Virginia University, where the then-governor's daughter was awarded an executive MBA allegedly without completing required credits. The school blamed record keeping, and Bresch maintains she earned the degree.
From the October 8, 2012 issue
How we pick the Power 50
The list is compiled by FORTUNE editors, who consider four criteria: the size and importance of the woman's business in the global economy, the health and direction of the business, the arc of the woman's career (resume and runway ahead), and societal and cultural influence.