Benjamin D. Brown is managing partner of Cohen Milstein and co-chair of the firm’s Antitrust practice. He is widely recognized as one of the nation’s leading antitrust litigators. Ben represents businesses, workers, and consumers in high-stakes cases challenging anticompetitive conduct—ranging from wage-fixing and price-fixing cartels to monopolization and exclusionary practices that distort markets and harm competition. 

Known for his strategic command and courtroom presence, Ben guides every aspect of his cases, from framing the legal theories and developing economic evidence to negotiating settlements or taking cases to trial. He has helped recover billions of dollars for victims of anticompetitive behavior. 

Ben has been appointed by federal courts to serve as co-lead counsel for plaintiffs in landmark matters such as Moehrl, et al. v. National Association of Realtors (N.D. Ill.), In re Plasma-Derivative Protein Therapies Antitrust Litigation (N.D. Ill.), Carlin v. DairyAmerica, Inc. (E.D. Cal.), and In re Mixed Martial Arts (MMA) Antitrust Litigation (D. Nev.), a case that resulted in what the court described as “life changing” recoveries for class members. 

Ben is also a leader in takings cases, claims that are brought under the Fifth Amendment of the U.S. Constitution for the unconstitutional taking of property without compensation. He also represents individuals or groups in litigations and confidential arbitrations involving complex commercial disputes, particularly those involving regulated markets. 

Ben’s work has earned national recognition, including honors such as Competition Law MVP, Titan of the Plaintiffs Bar, Finalist for the National Law Journal’s Lawyer of the Year, and Private Enforcement Achievement of the Year from the American Antitrust Institute in both 2024 and 2025. He is ranked by Chambers & Partners and listed among Lawdragon’s 500 Leading Lawyers and 500 Leading Litigators in America. The U.S. District Court for the District of Columbia has also honored Ben for his outstanding commitment to pro bono litigation. 

Before joining Cohen Milstein, Ben served as a trial attorney in the Antitrust Division of the U.S. Department of Justice, where he led investigations and trials. He also practiced at one of Washington’s most prestigious defense firms representing corporate defendants in antitrust matters, experience that gives him rare insight into how defendants approach and defend complex competition claims. Ben also served as a Special Assistant United States Attorney in the Eastern District of Virginia and taught Complex Litigation as an adjunct professor at Georgetown University Law Center.