Antitrust Law Source

Antitrust Law Source, published by Porter Wright Morris & Arthur LLP, focuses on developments in antitrust enforcement and competition law. The blog covers state and federal antitrust enforcement trends, including state attorneys general activities and multistate coordination efforts. It provides updates on legislative changes affecting antitrust laws, such as algorithmic pricing regulations and single-firm conduct statutes. The blog also addresses compliance with the Hart-Scott-Rodino (HSR) Act, including recent enforcement actions, changes to filing requirements, and annual threshold adjustments. Additionally, it discusses issues related to interlocking directorates and civil penalties under antitrust statutes, offering guidance for businesses navigating merger reviews and competition regulations.

On Jan. 14, 2026, the Federal Trade Commission (FTC) announced the annual changes to the notification thresholds for filings under the Hart-Scott-Rodino Antitrust Improvements Act (HSR) and certain other values under the HSR rules. The new thresholds will become effective