Highlights On March 19, 2026, the U.S. Court of Appeals for the Fifth Circuit denied the Federal Trade Commission’s motion for a stay pending appeal of the district court’s judgment vacating the FTC’s overhauled Hart-Scott-Rodino (HSR) premerger notification form and rules that were effective February 10, 2025 (New Rules). Effective immediately, the FTC will accept HSR filings using the Form and Instructions that were in place before the New Rules (the Old Rules).