FORTUNE's annual ranking of America's leading businesswomen

28 of 50
28. Gail Boudreaux
Gail Boudreaux
CEO, UnitedHealthCare, EVP UnitedHealth Group
UnitedHealth Group
2011 rank: 30
Age: 52
Wall Street likes UnitedHealth Group despite the regulatory turmoil in health insurance. Credit Boudreaux, who runs the $95-billion-a-year benefits business. Since she took the job in early 2011, UNH's stock is up 34%, while the sector climbed 27%.
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.