#2 Ginny Rometty

Rank 15

President and CEO, IBM

In October 2011, 30-year IBM veteran Rometty was made the CEO, the first woman in the company. She is implementing a five-year strategy to use new markets like cloud computing and business analytics software to drive $20 billion of revenue growth by 2015, which she believes is possible. She became the center of the conversation this year when historic Augusta National Golf Club maintained its controversial male-only policy and didn't invite her. Rometty started at IBM in 1981 as a systems engineer and climbed to head of global sales, where she oversaw results in 170 markets around the world.

#1 Sheryl Sandberg

Rank 10

COO, Facebook

After four years as Facebook's COO and leading the company through its $100 billion IPO in May, Sandberg was named to the social network's board of directors in June. She is Facebook's first female board member and owns nearly $1 billion of unvested stock in the company. The Harvard MBA served as chief of staff for the U.S. Treasury Department under President Bill Clinton, and managed Google's online global sales and operations as a vice president. She says, “I don't believe in 'having it all but I do believe in women and men having both a successful career and family. The more women we get into positions of power, the more likely we'll get that.”