John Terzaken III

Simpson Thacher & Bartlett LLP

Contact Details

Simpson Thacher & Bartlett LLP


John F Terzaken III is a partner at Allen & Overy LLP in Washington, DC and heads the firm’s cartel defense practice in the United States.  John advises U.S. and international clients involved in domestic and cross border antitrust and other regulatory investigations and litigation.  His practice spans government enforcement and private litigation of cartel and other antitrust infringements, market sector investigations, and general antitrust compliance, across all industry sectors.  Previously, John was Director of Criminal Enforcement of the DOJ, Antitrust Division, where he had management responsibility for the Antitrust Division’s criminal investigations and litigation nationwide.  John is a member of the Antitrust Sections of the American Bar Association (ABA) and International Bar Association (IBA) and is presently serving an appointment on the ABA’s International Cartel Task Force.  He is also a regular author and frequent speaker on antitrust matters for the ABA, IBA and other legal and academic organizations.


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