Washington State Enacts Merger Review Regime

By and on April 29, 2025

Washington is the first state to enact the Uniform Antitrust Premerger Notification Act, which requires merging parties that submit a federal filing under the Hart-Scott-Rodino (HSR) Act to also submit the HSR filing to the Washington attorney general if the deal has a sufficient nexus to Washington. Many states have merger notification requirements for certain industries, but Washington is the first state to enact a merger reporting policy that applies to all industries and includes significant penalties for noncompliance.

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Gregory E. Heltzer
Gregory (Greg) E. Heltzer focuses his practice on defending mergers and acquisitions before the US Federal Trade Commission, US Department of Justice, state antitrust authorities and foreign competition authorities. Greg has extensive experience in evaluating whether potential transactions will be cleared by antitrust enforcers and developing a viable path for clearance. In addition, he handles complex antitrust litigation, government investigations and antitrust counseling. Read Greg Heltzer's full bio.


Royce Brosseau
Royce E. Brosseau focuses his practice on antitrust, regulatory, and litigation matters. Read Royce Brosseau's full bio. 

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