Marco A. Dueñas

Senior Attorney
  • Bio
  • Admissions & Affiliations


Marco A. Dueñas is a Senior Attorney at Saxena White and a lead member of the Firm’s case development team. He focuses his practice on the identification, investigation, and commencement of complex securities litigation cases in trial courts throughout the United States and abroad.

Prior to joining Saxena White, Mr. Dueñas was an associate at a nationally recognized securities litigation firm where he investigated and commenced securities class actions, prosecuted direct and opt-out actions on behalf of institutional investors, and led efforts to prosecute securities claims related to public offerings in state courts following the U.S. Supreme Court’s decision in Cyan, Inc. v. Beaver County Employees Retirement Fund.

Mr. Dueñas represents institutional investors in domestic and multinational securities cases to recover investment losses and vindicate shareholder rights. Skilled in all phases of litigation including pleadings, dispositive motions, discovery, trial, and appeal, he develops innovative, fact-based case theories to expose violations of the securities laws and recover clients’ financial losses. Mr. Dueñas has represented dissenting shareholders in a foreign appraisal action in the Cayman Islands, securing a favorable judgment on behalf of his clients following a three-week bench trial.

Mr. Dueñas has played a key role prosecuting and resolving several high-profile cases, such as those against Nord Anglia Education (more than $130 million judgment following a $37.68 per share fair value appraisal—a 16% premium over the take-private transaction price), ADT Inc. ($30 million settlement), Benefitfocus, Inc. ($11 million settlement), Spectrum Brands Holdings, Inc. ($9 million settlement), Livent Corporation ($7.4 million settlement), and Fifth Third Bancorp ($5.5 million settlement).

For his achievements, Mr. Dueñas has been recognized as a New York Metro “Rising Star” by Super Lawyers.

Mr. Dueñas earned his Bachelor of Science, summa cum laude, from Farmingdale State College. Mr. Dueñas earned his Juris Doctor, cum laude, from Brooklyn Law School, where he served on the Brooklyn Journal of International Law and the Moot Court Honor Society, Appellate Division. Mr. Dueñas is an active member of the New York City Bar Association and the New York State Bar Association.

Mr. Dueñas is fluent in Spanish.

Admissions & Affiliations

  • State of New York
  • United States District Court for the Eastern District of New York
  • United States District Court for the Southern District of New York
  • United States Court of Appeals for the Ninth Circuit
  • Brooklyn Law School, JD
  • Farmingdale State College, BS