Publications Memos Go Back HSR Report Form Change to NAICS Codes 05.09.01 This memorandum deals with an interim rule effective July 1, 2001 that implements changes to certain reporting requirements on the Premerger Notification and Report Form under the Hart-Scott-Rodino Act. Related Insights 09.15.26 | Publications California OHCA Issues Final Regulations Implementing Expanded Health Care Transaction Review Requirements for Private Equity, Hedge Funds, and MSOs 09.14.26 | Publications The Ad Standard: Monthly Update - September 2026 08.17.26 | Publications FinCEN Terminates Beneficial Ownership Reporting Requirements Under the Corporate Transparency Act for U.S. Entities Related Services Related Practice Areas Litigation Antitrust and Trade Regulation Complex Commercial Litigation