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Sonia Lahr-Pastor is an associate in the firm's Washington, DC office. She represents clients in a variety of complex antitrust matters before government agencies and in federal court. Her litigation experience includes representing clients in bundling and tying cases, class actions, multi-district litigations, conspiracy and cartel cases, and other high-stakes complex antitrust litigation. Ms. Lahr-Pastor also represents clients in investigations before the Department of Justice and the Federal Trade Commission, including responding to Second Requests.  She has represented clients across a number of industries, including auto parts manufacturing, pharmaceuticals, and sports.

Pro Bono

  • Represented class of migrant mothers and children who had made a preliminary showing of eligibility for asylum in a case challenging the United States’ policy of detaining such mothers and children solely to deter additional immigration.

Previous Experience

  • Judge Richard A. Posner and Professor William M. Landes, University of Chicago Law School, Chicago, IL, Chief Research Assistant (2009-2010)