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ARTICLE · 29 JANUARY 2026

Indiana Poised To Become Third State With "Mini-HSR" Regime

McDermott Will & Schulte
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On January 21, 2026, the Indiana Senate Committee on Judiciary voted unanimously to advance Indiana's version of the Uniform Antitrust Pre-merger Notification Act (the Act).

United StatesAntitrust/Competition Law
Royce Brosseau
Royce Brosseau
Jon Dubrow
Jon Dubrow
Noah Feldman Greene
Noah Feldman Greene
Gregory Heltzer
Gregory Heltzer
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On January 21, 2026, the Indiana Senate Committee on Judiciary voted unanimously to advance Indiana's version of the Uniform Antitrust Pre-merger Notification Act (the Act). The Act resembles those enacted in 2025 in Washington and Colorado. Pending passage by the full legislature and signature by the governor, the Act is drafted to go into effect July 1, 2026.

In Depth

Like the Colorado and Washington laws, the Act requires a party that submits a Hart-Scott-Rodino Act (HSR) filing with the federal government to also file a copy of its HSR materials with the Indiana attorney general if one of the two following prongs is met:

  1. Principal place of business in the state: The party must provide the entire HSR filing (form and attachments). This generally refers to the headquarters address of the company making the filing. If a party is headquartered in Indiana, it will be required to make a submission to that state.

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