Skip To The Main Content
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 
John Terzaken
Partner
 
900 G Street, NW
Washington, D.C. 20001 
 
Email:
Phone: +1-202-636-5858
Fax: +1-202-636-5502
A leading antitrust litigator and former federal prosecutor, John Terzaken is Global Co-Chair of the Firm’s Antitrust and Trade Regulation Practice. John represents corporate and individual clients involved in government enforcement of antitrust, fraud and other white collar violations, as well as related follow-on civil litigation. His experience spans market sector investigations and litigation in all major industries, including financial services, pharmaceutical, professional services, manufacturing, energy, shipping, food and beverage, and many others. John previously served as the Director of Criminal Enforcement of the Department of Justice, Antitrust Division, where he oversaw the Division’s criminal enforcement and litigation nationwide. He has earned awards of distinction from the Attorney General of the United States and the Assistant Attorney General for the Antitrust Division. He is consistently recognized as a leading antitrust lawyer (Band 1) by both Chambers Global and Chambers USA, where clients describe him as “. . . very strategic and creative with investigations,” “one of the strongest lawyers I have ever worked with,” “highly professional and very responsive,” an attorney who has “invaluable insights into the inner workings of the agencies,” “knows the technical aspects of antitrust law and also how to intuitively apply that to business realities,” and has a “wonderful working manner with clients and government figures.” He is recognized as a “Litigation Star” both nationally and in D.C. by Euromoney’s Benchmark Litigation and is consistently recognized as a “Leading Lawyer” by The Legal 500 U.S. John is also recognized by Who's Who Legal​: Competition​.

Read Full Biography...

Work Highlights
  • Tyson Foods in a wage fixing antitrust class action alleging a decade-long conspiracy to fix wages
  • 21st Century Oncology in a civil suit alleging monopolization and attempted monopolization in violation of Sherman Act Section 2
  • Global financial institution in criminal investigations and related follow-on civil class action litigation involving trading of securities
  • National healthcare provider in a criminal antitrust “no-poach” investigation
  • Global professional services firm in a criminal antitrust “no-poach” investigation
  • International consumer foods corporation in a criminal antitrust investigation and related follow-on civil class action litigation involving the seafood industry
  • National healthcare provider in a criminal antitrust investigation into physician services
  • Multinational shipping company in a criminal investigation into potential antitrust violations
  • Corsair against antitrust class action claims alleging unlawful “no poach” agreements among Jackson Hewitt franchises
  • Micron in antitrust class actions alleging collusion of DRAM products
  • Covestro in antitrust class actions involving MDI and TDI
  • A multinational protein supplier in a criminal antitrust investigation
     
Accolades
  • Chambers Global: The World's Leading Lawyers for Business
  • Chambers USA: America's Leading Lawyers for Business
  • The Legal 500 United States, "Leading Lawyer"
  • Euromoney’s Benchmark Litigation, “Litigation Star”
  • Who's Who Legal, Competition
  • Who's Who Legal, Competition Future Leaders
  • Super Lawyers
  • Acritas Stars™, Star Lawyer
Education
  • University of Virginia School of Law, 2000 J.D.
    Editorial Board, Virginia Law Review
  • American University, 1996 B.A.
    magna cum laude
Associations
  • American Bar Association, Section of Antitrust Law; Member of the International Cartel Task Force
  • International Bar Association, Antitrust Committee
Admissions
  • District of Columbia 2001
  • U.S. Court of Appeals for the Fourth Circuit 2000
  • Virginia 2000
  • U.S. District Court Eastern District of Virginia 2000
  • U.S. Court of Appeals for the Second Circuit 2017
  • Supreme Court of the United States 

John Terzaken is Global Co-Chair of the Firm’s Antitrust and Trade Regulation Practice. John represents domestic and international clients in government enforcement and private litigation of cartel and other alleged antitrust violations, market sector investigations and antitrust compliance, encompassing all major industry sectors, including financial institutions, pharmaceutical, professional services, manufacturing, energy, shipping, food and beverage, and many others. His work highlights include defending:

  • Tyson Foods in a wage fixing antitrust class action alleging a decade-long conspiracy to fix wages.
  • 21st Century Oncology in a civil suit alleging monopolization and attempted monopolization in violation of Sherman Act Section 2.
  • A global financial institution in criminal investigations and related follow-on civil class action litigation involving trading of securities.
  • A international consumer foods corporation in a criminal antitrust investigation and related follow-on civil class action litigation involving the seafood industry.
  • Micron in antitrust class actions alleging collusion of DRAM products.
  • A national healthcare provider in a criminal antitrust investigation into physician services.
  • A multinational shipping company in a criminal investigation into potential antitrust violations.
  • A global chemical company in a criminal investigation and related follow-on civil class action litigation involving polyurethane products.

Prior to joining Simpson Thacher, John held a leading position in the DOJ’s Antitrust Division as Director of Criminal Enforcement, where he oversaw the Division’s criminal enforcement nationwide. His range of responsibilities included presiding over some of the largest global cartel investigations ever undertaken by the DOJ. He also served as the Division’s chief liaison with domestic and international law enforcement authorities, as well as the Financial Fraud Coordinator for inter-agency prosecutions and investigations. John’s DOJ service earned him awards of distinction from the Attorney General of the United States and the Assistant Attorney General for the Antitrust Division.

He is consistently recognized as a leading antitrust lawyer (Band 1) by both Chambers Global and Chambers USA, where clients describe him as “. . . very strategic and creative with investigations,” “one of the strongest lawyers I have ever worked with,” “highly professional and very responsive,” an attorney who has “invaluable insights into the inner workings of the agencies,” “knows the technical aspects of antitrust law and also how to intuitively apply that to business realities,” and has a “wonderful working manner with clients and government figures.” He is recognized as a “Litigation Star” both nationally and in D.C. by Euromoney’s Benchmark Litigation and is consistently recognized as a “Leading Lawyer” by The Legal 500 U.S. and Super Lawyers. He is also recognized by Who's Who Legal​: Competition.

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 by the ABA on the International Cartel Task Force. In addition to authoring an annual Global Cartel Enforcement Report published by Simpson Thacher, he regularly writes and speaks on antitrust matters for industry publications and events, including serving as the Co-Editor of The Cartels and Leniency Review.

John received his J.D. from University of Virginia School of Law, where he was on the Editorial Board of the Virginia Law Review. He received his B.A., magna cum laude, from American University in 1996.

News & Events

    Publications