March 1995 to May 2001
Koogle was Yahoo's first CEO, shepherding the company from startup to web giant. He stepped down when web ad revenue started to dry up and the dotcom bubble burst.
May 2001 to June 2007
The ex-Warner Bros. studio head made some good moves (new revenue sources, acquisitions), but he was criticized for lack of innovation and ceding market share to Google.
June 2007 to January 2009
Investors never forgave the Yahoo co-founder for spurning Microsoft's $44.6 billion buyout bid. (He thought it was too low.) He stayed on the board until January 2012.
January 2009 to September 2011
Bartz engineered Yahoo's search deal with Microsoft and brought down costs. But investors were impatient for a turnaround. The board famously fired her via a phone call.
January 2012 to May 2012
Thompson was ousted after only five months when activist investor Dan Loeb found out that he had embellished his résumé.