Irwin H. Warren is a senior partner in the firm’s Securities Litigation practice. He has extensive experience in class actions and derivative suits, securities and other complex litigation, regulatory proceedings, and internal investigations, as well as corporate governance, and other legal and professional ethics issues.
Mr. Warren has litigated complex cases in state and federal courts in more than twenty states. His nationwide trial and appellate practice has included representation of a wide range of US and international corporations and their directors, including Agnico-Eagle Mines, Arthur Andersen, Enron, General Motors, Health Management Associates, McGraw-Hill, LaBranche, Parmalat, Satyam Computer, and Tyco. Mr. Warren also frequently counsels US and foreign issuers, boards of directors and board committees, investment firms, and audit firms on disclosure, insider trading and other securities law issues, fiduciary duties and corporate governance, transactions, and in connection with internal and governmental investigations and cross-border regulatory proceedings.
Mr. Warren has written for numerous publications, including The Business Lawyer and New York Law Journal. He also has been a frequent speaker and author on a variety of topics involving the securities laws, class action and derivative litigation, and professional ethics for the American Bar Association, The Canadian Institute, the National Association of Corporate Directors, and other organizations.
Mr. Warren has co-chaired the ABA Section of Litigation’s Committees on Class Actions and Derivative Suits; Securities Litigation; and Ethics and Professionalism, as well as the Section’s Task Force on the Independent Lawyer. He has co-chaired and continues to serve on the Section of Litigation’s Federal Practice Task Force, where he has had principal responsibility for numerous initiatives, including addressing the SEC’s proposed “up-the-ladder reporting” and “whistle-blower” rules under the Sarbanes-Oxley Act, as well as proposals by Congress and the judiciary regarding class actions and other Federal Rules of Civil Procedure. He also currently is co-chair of the Section’s Attorney-Client Privilege Task Force and is the Section’s Liaison to the ABA’s Standing Committee on Federal Judicial Improvements; and he was chair of a Litigation Section task force that developed judicial protocols (adopted by the ABA in 2011 as recommended “best practices”) for litigating simultaneous US-Canadian cross-border class actions. Mr. Warren also served as a member of the Council of the Section of Litigation, which is responsible for setting Section policy on issues affecting the legal profession.
Mr. Warren has long been recognized by industry and business media as a leading securities and corporate governance lawyer, including by The Best Lawyers in America and SuperLawyers.
Mr. Warren twice has been a member of Weil’s Management Committee, and co-chairs the firm’s Ethics Committee. Mr. Warren holds a B.A. from Columbia College and a J.D. from Columbia Law School, where he was Editor-in-Chief of the Columbia Journal of Transnational Law and a Harlan Fiske Stone Scholar.
Bar Admissions
New York State; US Court of Appeals 1st Cir.; US Court of Appeals 2nd Cir.; US Court of Appeals 3rd Cir.; US Court of Appeals 4th Cir.; US Court of Appeals 5th Cir.; US Court of Appeals 6th Cir.; US Court of Appeals 8th Cir.; Eastern District New York; Northern District New York; Southern District New York