The merger control regime in the United States is governed by the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (HSR Act), as well as implementing regulations contained in 16 C.F.R. parts 801-803. Both the Federal Trade Commission (FTC) and the Antitrust Division of the U.S. Department of Justice (DOJ) perform substantive antitrust review of covered transactions. However, the FTC, through its Premerger Notification Office, is the principal enforcement agency for the HSR Act.
