Antitrust Act can refer to: The Sherman Antitrust Act, first United States federal government action to limit monopolies Sherman Antitrust Act (federal preemption) The Clayton Antitrust Act, enacted to remedy deficiencies in antitrust law created under the Sherman Antitrust Act Hart–Scott–Rodino Antitrust Improvements Act Tunney Act, officially known as the Antitrust Procedures and Penalties Act
See also United States antitrust law