Marlene Koury

New York Office
T: 212.350.2769
F: 212.350.2701
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Marlene Koury is a partner in the New York office of Constantine Cannon. Ms. Koury joined the firm in 2007 and concentrates her practice on antitrust litigation and counseling and representing whistleblowers under the False Claims Act and the Dodd-Frank Act.

Ms. Koury received her J.D., cum laude, from Seattle University, receiving the Award for Excellence in Constitutional Law. While there, Ms. Koury worked with the Access to Justice Hague Convention Project. Ms. Koury received her B.A. in Philosophy from the University of Washington.

Selected Recent Representations:

  • Representation of outpatient medical imaging providers in several successful lawsuits for group boycott and market allocation claims against a benefits management company
  • Representation of an international airline against allegations of price fixing
  • Representation of two scientists formerly employed by a major pharmaceutical company who allege the company falsified test data and used improper testing techniques to inflate the efficacy it reported to the FDA and on its drug labels
  • Representation of a former lab technician employed by an outpatient oncology clinic who alleges the clinic falsified patient records to support fraudulent billing of Medicare for services the clinic did not provide
  • Representation of a television organization involved in a trademark dispute

Ms. Koury is admitted to practice in New York and is a member of the Antitrust Section of the New York State Bar Association, the NYSBA Antitrust Section Class Action Committee and the Antitrust and International Sections of the American Bar Association.

Practice Groups


  • New York
  • U.S. District Court for the Eastern District of N.Y.
  • U.S. District Court for the Southern District of N.Y.


IRS Whistleblower Report to Congress Signals a Brighter Future AccountingWEB, (February 18, 2016)
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Celebrating the first five years of Dodd-Frank The Hilll, (July 16, 2015)
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How to Prevent the Next Bradley Manning and Edward Snowden Roll Call, (June 27, 2013)
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A Watchful Antitrust Eye in Healthcare BNA Antitrust & Trade Regulation Report (with Matthew Cantor), (December 7, 2012)
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Lesson Learned from the Petraeus Affair - Intelligence Agents Need Whistleblower Protections Too The Hill, (November 27, 2012)
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Two U.S. Courts Offer Conflicting Guidance On Protections for Internal Reporting Thompson Reuters , (September 26, 2012)
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Dodd-Frank Provisions Cause Whistleblower Dilemma American Banker, (September 11, 2012)
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A Stalled Farewell to Arms—Reinvigorating the Gun Control Movement NYSBA Government, Law and Policy Journal (with Richard Aborn), (Summer 2012) Reprinted with permission from: Government, Law and Policy Journal, Summer 2012, Vol. 14, No. 1, published by the New York State Bar Association, One Elk Street, Albany, NY 12207
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Boosting the Economy by More Use Of the 'Weakened Firm Defense' New York Law Journal (with Matthew Cantor), (January 20, 2009)

The London office of Constantine Cannon is a separate and independent limited liability partnership registered in England and Wales (with registered number OC376384) with a registered office at 1 Paternoster Square, London EC4M 7DX. Constantine Cannon LLP in London is authorised and regulated by the Solicitors Regulation Authority. The word "partner" denotes a member of Constantine Cannon LLP, or an employee or consultant with equivalent standing and qualifications. The professional rules applicable to the firm are available at the SRA website at