Starting today, February 10, 2025, all merger filings will be subject to new Hart-Scott-Rodino (HSR) rules. The new HSR rules will fundamentally alter the premerger notification process, and substantially increase the burden on filing parties, who will need to provide significantly more information and documents with their initial filings.

Companies can take steps today to make filings under the new rules less burdensome and increase the likelihood of achieving antitrust clearance, such as collecting and regularly updating the “off-the-shelf” information needed for all filings, and engaging in earlier discussions with the legal team to identify potential overlaps and supply relationships and develop key themes around transaction rationales and impacts on competition that will need to be included in the filing.

Read more here.