FORTUNE's annual ranking of America's leading businesswomen

26 of 50
26. Deirdre Connelly
Deirdre Connelly
President, North America Pharmaceuticals
2011 rank: 25
Age: 52
Connelly's division accounts for about one-third of GSK's revenue, but sales fell almost 5%, to just over $11 billion. Earlier this year she also became CEO of Human Genome Sciences, a promising biotech firm that GSK acquired for $3 billion.
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.