#6 Susan Wojcicki

Rank 25

Senior Vice President, Google

Susan Wojcicki is the woman behind all of Google's ad products, AdWords and AdSense, Analytics and DoubleClick, and was responsible for 96% of the company's $37.9 billion revenue in 2011. She and her team are termed in Google as "The SMARTASS". The mother of four has deep Google roots: she rented her garage to Sergey Brin and Larry Page and their nascent search engine in 1998. She was the company's 16th employee. Her sister is the wife of Brin.

#5 Marissa Mayer

Rank 21

CEO, Yahoo

Google's 20th employee and the 1^st woman stunned the tech world in July when she announced she was leaving the Google to become the new CEO of Yahoo!. Mayer said that she "had an amazing time at Google but ultimately it was a reasonably easy decision to take the top job at Yahoo!.” The 37-year-old joined Google in 1999 shortly after achieving a computer science masters from Stanford University. She is one of the youngest women in this list and joined her first corporate board in 2012: Walmart. On the same day she announced the move to Yahoo!, Mayer made another announcement to the press that she's pregnant and expecting her child this October.