Diller is the chairman of the board. Levin has been CEO and running g day to day operations for a bit now. That being said it's important to understand that IA

Diller is the chairman of the board. Levin has been CEO and running g day to day operations for a bit now. That being said it's important to understand that IAC businesses are run fairly independently. Many (most?) have their own CEOs, etc. Barry Diller had tried to get an acquisition of Angie's List before IIRC.