On February 10, 2026, California enacted Senate Bill 25 (“SB 25”), known as the California Uniform Antitrust Pre-Merger Notification Act. The new law takes effect on January 1, 2027, making California the third state—following Washington (effective July 27, 2025) and Colorado (effective August 6, 2025)—to implement a “mini-HSR” regime modeled after the Uniform Antitrust Pre-Merger

California’s new Senate Bill 763 increases civil and criminal antitrust penalties under the Cartwright Act, creates ambiguity around how violations are counted, and likely gives the California Attorney General added financial incentives and discretion to pursue enforcement. Click here to continue reading the full version of this alert.