Although much attention recently has been focused upon debates in Congress, potential legislative changes to U.S. antitrust law are not limited to proposals at the federal level. Many states are considering changes to their own antitrust laws, which usually can be enforced by state attorneys general and private plaintiffs. Importantly, New York legislators have introduced two bills that propose sweeping changes to the State’s antitrust law, the Donnelly Act, building on measures introduced in New York’s last legislative session.

These proposals, if enacted, would make New York’s single firm conduct statutory provisions the most aggressive in the United States and would give the New York Attorney General a more prominent role in reviewing transactions—including by creating a first-of-its-kind state merger notification requirement. These changes would allow New York’s antitrust law to reach a range of conduct not actionable under any existing federal or state antitrust law, and would introduce European-style antitrust standards to New York. Accordingly, this reform would create considerable new compliance challenges and risk for companies potentially subject to New York antitrust law, whether or not those companies are located in New York.