California Introduces New Wave of Antitrust Laws
The state has enacted amendments to the Cartwright Act and launched a new mini-HSR Act, reshaping California’s antitrust landscape.
California’s latest legislation signals a bold shift in the state's approach to antitrust enforcement, broadening the scope of activities subject to scrutiny and tightening review thresholds for certain mergers. The amendments to the Cartwright Act now expand the definition of competitive harms and require earlier disclosure for businesses engaged in potentially anti-competitive conduct. Meanwhile, the new mini-HSR Act establishes a streamlined regulatory pathway for smaller, cross-border transactions that were previously exempt, subjecting them to expedited review and public commenting. These changes have immediate implications for firms advising clients on mergers, joint ventures, and other marketplace arrangements in California. Counsel should update compliance protocols, assess existing transactions under the new thresholds, and advise clients on potential filing obligations or strategic adjustments. Staying abreast of the shifting statutory base will be critical for anticipating enforcement trends and mitigating antitrust risk across a broad spectrum of clients.