State-Level Merger Filing Toolkit
This Toolkit is brought to you by AHLA’s Antirust Practice Group.
- September 16, 2025
- Sarah Zhang , Baker Botts LLP
- Jeffrey Oliver , Baker Botts LLP
- Rachel Rasp , Baker Botts LLP
Since Rhode Island enacted the first state-level merger notification requirement in 1997 for certain transactions involving the establishment, maintenance, or operation of a hospital, other states have increasingly followed suit in enacting their own health care merger notification regimes. These state notification laws have often been referred to as “mini-HSR” or “baby HSR” laws. Separately and in parallel with the development of these state-level health care merger notification laws, states have also recently begun to adopt the Uniform Antitrust Premerger Notification Act approved by the Uniform Law Commission in 2024. The trend of states enacting their own state-level merger notification laws—both notification and review regimes for health care transactions and the uniform notification law—is only likely to accelerate. Given the growing number of state-level merger notification requirements, it is increasingly important for businesses contemplating any transactions to keep track of the state-level notification laws and analyze whether their proposed transactions could be subject to a state-level filing requirement.
AHLA's Antitrust Practice Group provides the information for the state-level merger notification laws that are currently in effect to serve as a helpful tool in making a preliminary determination of which notification requirements may be triggered by a proposed transaction. However, each state law involves additional nuances and considerations that may impact the analysis. Parties are advised to seek experienced counsel to assist with making filing determinations.
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