The Hart-Scott-Rodino Act (“HSR Act” or the “Act”) requires parties to certain acquisitions to notify the Federal Trade Commission (“FTC”) and the Antitrust Division of the Department of Justice (“DOJ”) (collectively, “the Agencies”), and to observe the applicable statutory waiting period before closing. The HSR Act’s applicability is limited both initially by the size of transaction and size of person thresholds, and subsequently by any statutory exemptions.