California Enacts “Mini-HSR” Law, Joining Washington and Colorado

On February 10, California became the latest state to enact a “mini-HSR” law when Governor Newsom signed Senate Bill No. 25 (SB 25)—the California Uniform Antitrust Premerger Notification Act—into law. This legislation, which will go into effect on January 1, 2027, requires certain parties filing premerger notifications under the federal Hart-Scott-Rodino (HSR) Act to additionally file copies of their federal filings with the California Attorney General. With California joining Washington and Colorado in adopting state-level premerger notification requirements, dealmakers should take note of these evolving compliance obligations as they plan transactions in 2027 and beyond.

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Source: https://www.bassberry.com/news/california-enacts-mini-hsr-law-joining-washington-and-colorado/

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