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As the company's first chief executive, Tim Koogle
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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.(Credit: AP)

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Yahoo! CEOs through the years

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.