FORTUNE's annual ranking of America's leading businesswomen

33 of 50
33. Bonnie Hammer
Bonnie Hammer
Chairman, NBC Universal Cable Entertainment and Cable Studios
2011 rank: 36
Age: 62
Hammer's portfolio continues to deliver eyeballs -- and some $2 billion in 2011 profits --to NBCU: Syfy viewership increased by 10%, a rebranded E! launched several original programs, and USA remains cable's most-watched network.
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.