Meet the 18 Fortune 500 female CEOs

It has been a banner year for women in business. The Fortune 500 executive ranks now include a record 18 female chief executives. Check out the full list of female power players, starting with the most recent additions.

Ginni Rometty
Ginni Rometty
Company: IBM
Fortune 500 rank: 18
First year as CEO: 2012
Most Powerful Women rank: 7

A 30-year IBM veteran, she added marketing and strategy oversight to her role last year. The move positioned her as one of the company's top two candidates to replace current CEO Sam Palmisano, and it worked. Rometty will be Big Blue's next CEO, replacing Palmisano in January.

By Fortune Editors - Last updated October 26 2011: 12:52 PM ET
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The power 50

Boardroom battles and power plays shaped this year's U.S. list, which boasts eight new faces and -- surprise! -- a new No. 1.