California Becomes The Third State To Adopt The Uniform Antitrust Premerger Notification Act

On February 10, 2026, the California Uniform Antitrust Premerger Notification Act¹ was signed into law. California has thus become the third state to adopt the Uniform Antitrust Premerger Notification Act² (Uniform Act), following Colorado and Washington state. The Uniform Act requires parties filing premerger notification forms under the Hart-Scott-Rodino (HSR) Act with the Federal Trade Commission (FTC) and the Department of Justice (DOJ) to file copies of the forms with the adopting states, if certain jurisdictional requirements are satisfied. The California statute goes into effect on January 1, 2027.

The California statute for the most part adopts the Uniform Act, although there are a few differences as noted below.