Jack in the Box, Inc. is an American fast food restaurant chain founded on February 21, 1951, by Robert O. Peterson in San Diego, California, where it is headquartered. The chain has over 2,712 locations, primarily serving the West Coast of the United States. Restaurants are also found in large urban areas outside the West Coast, as well as two in Guam. The company also formerly operated the Qdoba Mexican Grill chain until Apollo Global Management bought the chain in December 2017.