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Marjorie P. Duffy


(T) +1.614.281.3655
(F) +1.614.461.4198


  • The Ohio State University (J.D. cum laude 2007; Articles Editor, Ohio State Law Journal; National Moot Court Team); University of Virginia (B.A. with high honors 2002; Honors Program in Philosophy)

Bar Admissions

  • Ohio; New York; U.S. Courts of Appeals for the Third, Sixth, and Ninth Circuits; and U.S. District Courts for the Southern and Northern Districts of Ohio


  • Law Clerk to the Honorable William B. Chandler III, Chancellor, Delaware Court of Chancery (2007-2008)

Marjorie Duffy defends corporations, directors, and officers in securities, shareholder, and derivative litigation. She concentrates on litigation arising from mergers and acquisitions and other significant corporate events, as well as on fiduciary, governance, and appraisal claims. She advises clients under investigation, including by the SEC and DOL, and assists with internal investigations. Marjorie also litigates consumer class actions involving RICO and other statutory claims.

Marjorie's representative litigation success includes obtaining dismissals of securities class actions under the Private Securities Litigation Reform Act (PSLRA) and of stockholder derivative and class actions in state and federal courts. She successfully has litigated M&A and other commercial disputes and recently obtained summary judgment in a nationwide consumer class action. Marjorie defended a KeyCorp affiliate in an MDL relating to the Madoff scandal and represented National City Corporation (now part of PNC Financial Services Group) in numerous securities, shareholder, derivative, and ERISA lawsuits arising from the subprime mortgage crisis. Other representative clients include Abercrombie & Fitch, Cardinal Health, Cooper Tire, FirstMerit, Lubrizol, Nationwide Mutual Insurance Company, Scotts Miracle-Gro, and Wendy's.

Before joining Jones Day in 2008, Marjorie served as a law clerk to the Chancellor of the Delaware Court of Chancery. She is a trustee of the Friends of the Columbus Metropolitan Library and chairs its Governance Committee. She also serves as vice chairman of the board of directors of VOICEcorps, which provides services to the visually impaired, and she is a long-time volunteer reader.

Marjorie serves as the New Lawyers Group coordinator in the Columbus Office.

Marjorie Duffy