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Ian S. Marx is a business litigator with varied and wide-ranging experience in the area of complex commercial litigation. He provides clients with representation and advice concerning a variety of disputes. Ian's abundant courtroom experience includes appearances before numerous state and federal courts, bankruptcy courts, the surrogate's court, arbitration tribunals and in mediation proceedings.


  • Complex commercial litigation
  • Disputes regarding corporate governance, mergers and acquisitions and securities
  • Litigation involving trusts and estates
  • Partnership disputes and those involving closely held corporations
  • Disputes involving real property
  • General equity practice
  • Bankruptcy litigation

The attorney is providing legal services through and affiliated with Greenberg Traurig, LLP, a New York Limited Liability Partnership. Results may vary depending on your particular facts and circumstances.



  • Represented a preeminent pharmaceutical company in Delaware Chancery Court litigation arising from the largest hostile acquisition in history, resulting in the successful consummation of a transaction valued at over $90 billion.
  • Prosecuted complex claims involving approximately $500 million against a "big five" auditing firm arising from the largest insurance insolvency in North American history.
  • Represented the interests of a prominent real estate developer in a complex partnership dispute involving, among other things, properties valued at over $1 billion.
  • Frequently appears in court in emergent situations to obtain temporary and preliminary injunctive relief in a variety of contexts.
  • Previously associated with a major New York law firm, Ian represented Fortune 500 companies, financial institutions and other business entities, and individuals in general complex commercial disputes, as well as those relating to the issuance and trading of securities and commodities, corporate governance and mergers and acquisitions.

Recognition & Leadership

  • Listed, The Best Lawyers in America, Commercial Litigation; Consumer Protection Law; Mass Tort Litigation / Class Actions - Defendants, 2022-2024 
  • Finalist, New Jersey Law Journal, “Attorney of the Year,” 2023
  • Team Member, The American Lawyer, “New Jersey Litigation Department of the Year,” 2022
  • Team Member, Benchmark Litigation’s “New Jersey Law Firm of the Year,” Shortlisted, 2022
  • Team Member, U.S. News - Best Lawyers®, Best Law Firms Edition, "Law Firm of the Year," Real Estate - Litigation, 2017 and 2022
  • Team Member, The American Lawyer’s “Regional Litigation Department of the Year – New Jersey,” Finalist, 2019 
  • Team Member, U.S. News - Best Lawyers®, Best Law Firms Edition, "Law Firm of the Year," Banking & Finance - Litigation, 2017
  • Listed, Super Lawyers magazine, New Jersey Super Lawyers, 2007-2012 and 2014-2017
    • "Rising Star," 2007-2008
  • Member, Winning Team, New Jersey Law Journal's "Class Action Litigation Department of the Year," 2016
  • Member, Winning Team, New Jersey Law Journal’s "General Litigation Department of the Year" award, 2013
  • Team Member, Lexology’s Client Choice Award USA & Canada, United States: New Jersey, 2013
  • Named as one of the New Jersey Law Journal's 40 Under 40, 2007

A description of the selection methodology for the above awards can be found here. No aspect of this advertisement has been approved by the Supreme Court of New Jersey.

  • Member, The Fellows of the American Bar Foundation
  • Vice-chair, Committee on General Equity Practice, Essex County Bar Association


  • J.D., magna cum laude, New York Law School, 1994
    • Editor, New York Law School Law Review
  • M.A., International Affairs, Drew University, 1991
  • B.A., Political Science and Italian Studies, Dickinson College, 1990
  • Law Clerk, Honorable William H. Walls, United States District Court Judge for the District of New Jersey, 1994-1995
  • New Jersey
  • New York