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Contact details

Allen & Overy LLP
1101 New York Avenue, NW
Washington, DC
United States

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  John Terzaken

Partner Co-Head Antitrust

Washington, D.C.

John is the co-head of the firm’s global Competition practice and the head of the firm’s D.C. Investigations and Litigation practice. He 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. In his tenure with the Antitrust Division, John investigated, litigated, and presided over some of the largest global cartel investigations undertaken by the DOJ. He also served as the Antitrust Division’s primary liaison with state, federal, and foreign law enforcement authorities, as well as the Antitrust Division’s Financial Fraud Coordinator for inter-agency prosecutions, investigations, and information sharing. John’s DOJ service earned him awards of distinction from the Attorney General of the United States and Assistant Attorney General for the Antitrust Division.

John is a member of the Antitrust Sections of the American Bar Association (ABA) and International Bar Association (IBA) and is serving an appointment by the ABA as a Vice Chair for the Cartel and Criminal Practice Committee.  John is also a regular author and frequent speaker on antitrust matters at ABA, IBA and other academic and client events.

John is recognized by Chambers 2017, Legal 500 2017, and Super Lawyers as a leading individual for Antitrust. According to Chambers, John “is a renowned figure in the cartel and criminal antitrust sphere who gains plaudits across the board.”  Sources quoted by Chambers say that he has established a wonderful working manner with clients and government figures and provides highly professional and very responsive services. 

Professional qualifications

Admitted: Bar of the District of Columbia 

Admitted: Bar of the Commonwealth of Virginia 

Admitted: United States District Courts 
    District of Columbia
    Eastern District of Virginia

Admitted: United States Court of Appeals for the Fourth Circuit

Admitted: United States Supreme Court

Academic qualifications

J.D., University of Virginia School of Law, Editorial Board of the Virginia Law Review

B.A., magna cum laude, American University

Published work

“The ICN Working Group: Driving Global Coordination and Convergence in International Cartel Enforcement,” Getting the Deal Through: Cartel Regulation (2016)

"New Criminal Division Compliance Hire: Will Antitrust Division Follow Suit?," The Antitrust Counselor (Dec. 2015), with Erik Raven-Hansen and Matthew Boucher

"You're Fired! The Expanding Role of Behavioral Remedies in Cartel Enforcement," William E. Kovacic: An Antitrust Tribute Liber Amicorum (Vol. II) (2014)

"How Much is Too Much? A Call for Global Principles to Guide the Punishment of International Cartels," Antitrust Magazine (2013)

U.S. Chapter, Cartels and Leniency Review (2013)

"Striking the Right Balance – The Importance of Leniency to the Global Rise of Private Antitrust Enforcement," Concurrences (2013)

"Global Antitrust Cartel Enforcement – More Authorities, Increased Coordination, Higher Stakes," Global Insight (2012)

"U.S. v. AU Optronics – Lessons for an 'Effective' Antitrust Compliance Program," The Antitrust Counselor (2012)

"Antitrust Enforcement Has Arrived on Wall Street," Allen & Overy Risk Note (2012)

"What's Next: Total Accountability for Recovery Act Fraud," United States Attorneys' Bulletin, Vol. 28, No. 5 (2010)

"A Note on Understanding, Detecting, and Reporting Criminal Antitrust Violations," Darden Business Publishing (Oct. 2008) 

"Casting a Long IP Shadow Over Antitrust Jurisprudence: The Federal Circuit’s Expanding Jurisdictional Reach," 69 Antitrust L.J. 711 (2002) 

"Antitrust/Intellectual Property Law Issues for the Transactional Lawyer," Program, Annual Meeting of the Antitrust Law Committee, Section of Business Law (2002) 

"Noerr-Pennington Immunity: Patentee Petitioning & the Antitrust Laws," Program, Intellectual Property & Antitrust: Navigating the Minefield (2001) 

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