Mark Popofsky is a Lecturer on Law at Harvard Law School and Chair of the Antitrust Group at Ropes & Gray LLP. He also serves as an Adjunct Professor at Georgetown University Law Center and a Lecturer at the University of Pennsylvania Carey Law School. His expertise spans antitrust law, intellectual property, and international law, with a focus on exclusionary conduct and the intersection of antitrust and IP rights. Education: J.D. from Harvard Law School (1993), A.B. in History and Economics from Brown University (1990). Clerkship: U.S. Court of Appeals for the Ninth Circuit (1993–1994). Research interests include monopolization doctrine, Sherman Act applications, patent assertion entities, and the extraterritorial scope of antitrust laws. Notable publications include widely cited works on antitrust standards and the Burton Prize-winning analysis of the Sherman Act’s criminal extraterritoriality. Professional highlights include key roles in landmark cases such as United States v. Microsoft Corp. and United States v. Nippon Paper . He currently serves as trial counsel for Google in the United States v. Google case and secured a major victory in Ixchel Pharma v. Biogen before the California Supreme Court (2020). Awards: Burton Prize for legal achievement (2011). Advising and grants: While no formal advisees are listed, Popofsky teaches advanced antitrust courses and contributes to policy debates. He is a leader in the ABA Antitrust Section and frequently speaks on antitrust/IP intersections.








