Terry Semel is an American corporate executive who made significant contributions to the media and technology industries. He served as the chairman and CEO of Yahoo! Incorporated from 2001 to 2007, a period of major transformation for the internet company. Before his tenure at Yahoo, Semel spent 24 years at Warner Bros., where he served as co-chairman and co-chief executive officer. His leadership has been noted for both major successes in media and pivotal, though sometimes controversial, decisions in the early days of the web.