The Hart–Scott–Rodino Antitrust Improvements Act of 1976 (Public Law 94-435, known commonly as the HSR Act) is a set of amendments to the antitrust laws of the United States, principally the Clayton Antitrust Act. The HSR Act was signed into law by president Gerald R. Ford on September 30, 1976. The context in which the HSR Act is usually cited is 15 U.S.C. § 18a, title II of the original law. The HSR Act is named after senators Philip A. Hart and Hugh D. Scott, Jr. and representative Peter W. Rodino.