FORTUNE's annual ranking of America's leading businesswomen


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4. Irene Rosenfeld
Irene Rosenfeld
Chairman and CEO
Kraft Foods
2011 rank: 1
Age: 59
Rosenfeld is the mastermind behind the planned division of Kraft Foods into two companies on Oct. 1. She will lead Mondelez International, the snacking business, and have responsibility for $35 billion in revenue (vs. $54.4 billion under her control presplit). She'll retain brands such as Oreo, Ritz, and Tang.
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.