Who's the Boss?

5 of 10

Diane Greene VMware

Diane Greene was part of a team of Silicon Valley entrepreneurs who founded VMware, a computer virtualization company, back in 1998 as the tech market heated up. Greene, who once ranked No. 22 on Fortune’s Most Powerful Women list, was fired from her job as CEO in July 2008 after the company’s stock dove 60 percent. Before she left, Greene had helped grow VMware from a small start-up to a full-fledged business software firm with nearly $2 billion in revenue.