In between Thompson's departure and Mayer's appointment, Yahoo was led by interim CEO Ross Levinsohn, a Yahoo executive vice president and head of Global Media. He left shortly after Mayer's arrival.
Yahoo has been on a years-long financial and technology slump, going through several executive shake-ups and rounds of layoffs.
Juan Carlos Perez covers enterprise communication/collaboration suites, operating systems, browsers and general technology breaking news for The IDG News Service. Follow Juan on Twitter at @JuanCPerezIDG.