Date: 10/25/2012
Why: Talent

Marissa Mayer's first poaching came in the form of a year-old mobile app development company called Stamped. The company launched an iPhone app in November of 2011 that allowed users to keep track of things they-books, movies, restaurants, etc-liked and things their friends liked. Shortly after getting a large round of funding, Yahoo! came through and scooped it from an estimated $100 million.