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Nov. 26, 2025

The proliferation of state-level antitrust review

See more on The proliferation of state-level antitrust review

Kyle W. Mach

Partner
Sullivan & Cromwell LLP

Phone: (415) 512-4044

Email: kyle.mach@mto.com

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Thasos A. Athens

Associate
Sullivan & Cromwell LLP

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The proliferation of state-level antitrust review

Many readers will know that the Hart-Scott-Rodino Antitrust Improvements Act of 1976, known as the "HSR Act," is the principal federal law governing antitrust premerger notification. Lesser known is the fact that several states have maintained a variety of their own premerger notification statutes and regulations that sit alongside the federal regulatory regime. In contrast to the HSR Act's broad sweep, however, these state laws have been mostly restricted to healthcare-relat...

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