Yahoo By shirlynn Apr 17, 2001 Terry Semel steps up as new CEO of Yahoo Terry Semel steps up as new CEO after Tim Koogle steps down. Period: May 1, 2001 to Mar 14, 2012 Yahoo Change of Management Timeline of the changes made with heads of companies. May 7, 2001 Tim Koogle Tim Koogle Resigned as CEO in midst of hard times. Jun 18, 2007 Jerry Yang Replaces Terry Semel Yahoo Co Founder Jerry Yang replaces Terry Semel as CEO. Nov 17, 2008 Jerry Yang steps down after 18 months Jan 13, 2009 Carol Bartz Joins Yahoo as New CEO Sep 6, 2011 Carol Bartz is Fired as CEO of Yahoo Jan 1, 2012 Scott Thompson is appointed CEO after Carol Bartz fired May 13, 2012 Scott Thompson and Roy Bostock
