#366 What's the State of Mini-HSR Regimes? Perspectives from the Colorado & Washington State AGs

State attorneys general are taking a more active role in merger control, with Colorado and Washington leading the way on new "mini-HSR" notification regimes. What do these new state pre-merger filing laws require, and how should companies and practitioners navigate them alongside the federal Hart-Scott-Rodino Act? Assistant Attorneys General Paula Pera Czollak and Bryn Williams join hosts Puja Patel and James Hunsberger to discuss the origins of the Uniform Antitrust Pre-Merger Notification Act, lessons from the first months of filings in Colorado and Washington, key interpretive questions practitioners are raising, and what the spread of state mini-HSRs could mean for national antitrust enforcement. Listen to this episode to learn more about how emerging state-level merger notification regimes are reshaping the U.S. antitrust landscape and what companies need to know now. With special guests: Paula Pera Czollak, Assistant Attorney General, Antitrust Division, Washington State Office of the Attorney General and Bryn Williams, First Assistant Attorney General, Colorado Attorney General's Office, Leader of Antitrust Unit Related Links: Hosted by: James Hunsberger, Axinn, Veltrop & Harkrider and Puja Patel, Cleary Gottlieb Steen & Hamilton

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#366 What's the State of Mini-HSR Regimes? Perspectives from the Colorado & Washington State AGs is an episode from Our Curious Amalgam by Paula Bellenoit.

This episode is 35:44 long.

This episode was published on Feb 23, 2026.

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