3) Leah BuLesque

#Ranked 45 in Silicon Valley's Best 100

CEO; Founder and CPO, TaskRabbit

TaskRabbit was launched in 2011 as a local network which allows users to post and complete tasks in neighbourhood.

2) Sheryl Sandberg

#Ranked 21 in Silicon Valley's Best 100

COO, Facebook

She grew the company’s ad business to a $4 billion revenue run rate. When Facebook finally sells stock to the public this year, she has a chance to become one of the world’s few self-made billionaire women

1) Meg Whitman

#Ranked 06 in Silicon Valley’s Best 100

CEO, HP

It was a wildly tumultuous year at HP and Lane and Whitman were right in the middle of it all. Lane fired new CEO Leo Apotheker and installed Whitman. Together they're trying to restore order to the company which was rocked by the sudden departure of Mark Hurd.