Revised thresholds under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (15 U.S.C. § 18a) (HSR) were published in the Federal Register on January 23, 2014. The thresholds are adjusted annually based upon changes in gross national product. The new thresholds will become effective on February 24, 2014 for transactions that close on or after that date.