Introduction US law is littered with dozens of immunities and exemptions that limit or preclude the application of antitrust laws. While some immunities and exemptions exist by virtue of legislation, many have been created by federal courts. As a result, determining whether the antitrust laws apply to a particular course of conduct frequently requires consideration of potential exemptions and immunities as well as any developments in statutory or case law. The past year has seen developments in several immunities and exemptions, the most significant being the Supreme Court’s ongoing explanation of state action immunity. Other courts are also poised to provide guidance on exemptions for the agriculture and baseball industries. These unfolding developments could affect local governments, businesses, and consumers in the US.