Franchisees of the Dollar-Thrifty Motor Group filed an antitrust complaint filed in the Western District of Washington, alleging that the merger would violate the Clayton Act by substantially lessening competition in the car rental market. The plaintiff’s specifically claim that if Avis acquires Dollar-Thrifty then there would be an increase of market concentration in U.S. airports. The complaint alleges that the merger would increase Avis-Budget’s market share from 29% to 41% and create the largest airport car rental service in the U.S.