Denise Plunkett is a trial lawyer with more than 25 years of experience handling an impressive array of high-profile antitrust cases and other high-stakes commercial disputes. Denise has served as lead trial counsel in well over a dozen jury trials of varying types. She has successfully represented MasterCard in some of its most significant antitrust cases, including challenges to its currency conversion and chargeback practices, and recently won a federal jury trial concerning the termination of a Mastercard membership. Her diverse litigation and counseling practice includes trials and appearances in numerous federal and state courts, international and AAA arbitrations, advocacy before the FTC Bureau of Competition, and appellate and other post-judgment representations.


Denise has significant experience and longstanding relationships with leading companies in the payments, financial services, and pharmaceutical industries. She is a trusted advisor to her clients, aggressively representing them in litigation, providing antitrust and regulatory guidance, and helping them to navigate issues related to legal and conduct risk.


Denise Co-Chairs the New York State Bar Association’s Heath Care and Pharmaceuticals Committee and previously served as Co-Chair of the Unilateral Conduct Committee. She is also a member of the New York City Bar Antitrust Committee. She is recognized for her antitrust work by The Legal 500, and regularly speaks and writes in a wide variety of areas, including antitrust developments, litigation practice, gender diversity in the profession, and ethics.