Who owns 'fast casual'?

The big boys of fast food are fully invested in what has come to be known as 'fast casual' restaurants. Although it isn't shouted from the mountain tops, its no secret who owns who: the Baja Fresh Mexican Grill chain is owned by Wendy's and the Qdoba Mexican Grill chain was purchased by Jack in the Box in 2003. McDonald's owns both Boston Market and Chipotle.