WASHINGTON — The Federal Trade Commission on July 6 granted early termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 Ralcorp Holdings, Inc. for St. Louis-based Ralcorp Holdings, Inc.’s acquisition of American Italian Pasta Co., Kansas City.

Ralcorp announced June 21 it had agreed to acquire AIPC in a cash tender offer and subsequent merger for approximately $1.2 billion.