Internet search engine and web giant Yahoo! has gone through several big changes in corporate structure since the company's founding in 1995. Here is a list of every Yahoo CEO, past and present, who influenced the company's fortunes.
As the company's first chief executive, Tim Koogle oversaw Yahoo's meteoric rise during the dot-com bubble, when it made big acquisitions including GeoCities and Broadcast.com. He stepped down in 2001 before the bubble burst in earnest and was replaced by Terry Semel.
Terry Semel was Yahoo's CEO from 2001-2007. Semel was responsible for releasing Yahoo user information to the Chinese government, for which he and the company came under major scrutiny. He was replaced by Yahoo co-founder Jerry Yang.
Yahoo co-founder Jerry Yang was the company's CEO from 2007-2009. Stockholders were critical of Yang after he refused a takeover from Microsoft, which caused stock prices to drop drastically. He was replaced by Carol Bartz.
Carol Bartz was the CEO of Yahoo from 2009-2011, and was responsible for cutting hundreds of jobs and trying to restructure the company in the wake of declining stock prices. She was fired in 2011 and replaced by Yahoo Chief Financial Officer Tim Morse, who served as interim CEO.
Yahoo Chief Financial Officer Tim Morse took over as interim chief executive of Yahoo after Carol Bartz was fired in 2011. He held the position for four months before Scott Thompson was chosen as the new CEO.
Scott Thompson was fired just four months after being named Yahoo's CEO when he was accused of padding his resume. Thompson was replaced by Yahoo's media and advertising chief, Ross Levinsohn, who served as interim CEO.
Ross Levinsohn was named Interim CEO in 2012 after Scott Thompson was fired. He was replaced by current chief executive Marissa Mayer just a month later in July 2012.
Marissa Mayer recently marked her first anniversary as CEO of Yahoo. Mayer is responsible for the company's acquisition of Tumblr in May 2013 and has been ranked as one of the most powerful women in the world by Forbes.