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Leslie D. Corwin

  • Litigation
Leslie D. Corwin

Representative Experience

Les is an experienced trial and appellate lawyer, and Managing Partner of the Firm’s New York office. His practice focuses on disputes, mergers and acquisitions, liquidations, dissolutions, and bankruptcies. He has broad experience with the full range of valuation, accounting, and ethical issues that typically arise in business disputes. He has litigated issues of first impression and his practice also includes elements of finance, securities, entertainment, employment law, ERISA, real estate, and bankruptcy.

Les has represented and negotiated on behalf of the principals, partners, and senior executives of many of the country’s leading investment banks and private equity firms, international and national law firms and accounting firms, broker-dealers, investment banks, hedge funds, and real estate developers.

Respected by courts for his substantive knowledge and professionalism, Les has testified as an expert witness, is a member of the American Law Institute, a member of the Committee on Character and Fitness for the Supreme Court of the State of New York, First Judicial Department, and serves on multiple other court committees.

In 2019, Les was honored with a Lifetime Achievement Award by the New York Law Journal and was named one of the New York Law Journal’s Inaugural List of New York Trailblazers. He is a frequent analyst on CNN, CNBC, and Fox television, as well as for The Wall Street Journal and The New York Times. He also writes extensively for law journals and leading industry publications, and has lectured for the judiciary, bar, legal associations and law schools, industry organizations, and Harvard Business School. His 1998 book, Law Firm Partnership Agreements, which he co-authored, is considered the definitive treatise on the subject.

In July 2017, Les participated in the Aspen Institute’s 2017 Justice & Society Seminar, an annual invitation-only seminar co-founded by the late Supreme Court Justice Harry A. Blackmun that is composed of 20 distinguished participants from various professional fields.

Practice Focus

  • Litigation


  • Fordham University School of Law, J.D.
  • Brown University, B.A.


  • New York
  • Supreme Court of the United States
  • U.S. Court of Appeals for the Second Circuit
  • U.S. Court of Appeals for the Third Circuit
  • U.S. District Court for the Southern District of New York
  • U.S. District Court for the Eastern District of New York
  • U.S. District Court for the District of Colorado

Honors and Awards

  • Elected to the WC Mepham High School Alumni Association’s Who’s Who Hall of Fame in the Field of Law, 2020
  • Honored with 2019 Lifetime Achievement Award by the New York Law Journal
  • Named to the New York Law Journal’s Inaugural List of New York Trailblazers, 2019
  • Selected for inclusion in The Best Lawyers of America ©, Commercial Litigation, 2005-2021, Litigation – Real Estate, 2005 – 2017
  • Selected for inclusion in New York Metro Super Lawyers, 2006 - 2008, 2010 - 2020
  • AV Preeminent Peer Review Rated by Martindale-Hubbell
  • Named, “Legal Elite” in Litigation, Avenue Magazine, 2011 - 2012
  • Listed, Appellate Practice Group of the Year, Law 360, 2011
  • Listed in Who’s Who in American Law
  • Recommended in “PLC Which Lawyer?”, 2009


  • Co-Author, “Law Firm Partnership Agreements,” Law Journal Seminars-Press, 1998
  • Author, “Response to Loyalty in the Firm: A Statement of General Principles on the Duties of Partners Withdrawing from Law Firms,” 55 Wash. & Lee L.Rev. 1055, 1998
  • Co-Author, “What Baggage Can Withdrawing Law Partners Carry Out The Revolving Door?” Rhode Island Bar Journal, January 2001
  • Quoted, "Partner Pay Cuts Could Reach Richest Firms if Recovery Drags," Bloomberg Law, May 14, 2020 
  • Quoted, "As Law Firms Change Their Pension Plans, Will Retiring Partners Shoulder the Risk?" The American Lawyer, April 21, 2020
  • Featured, “All-Star Acquisitions: The 25 Biggest Lateral Moves of 2018,” The American Lawyer, February 3, 2019
  • Quoted, “Battle Over Howrey Collapse on D.C. Court’s Doorstep”, Bloomberg Law, December 14, 2018
  • Quoted, “Once Storied Sedgwick Files for Bankruptcy as Wind-Down Fails”, The American Lawyer, October 2, 2018
  • Quoted, “Beverly Hills Firm Lures Blank Rome Partner Duo to Expand in New York”, New York Law Journal, June 19, 2018
  • Lecturer, New York State Bar Association Commercial Litigation Academy (2019, 2017)

Professional Affiliations and Civic Involvement

  • American Bar Association
  • American Bar Association’s Section of Business Law
  • American Bar Foundation Fellow
  • American Law Institute
  • Association of Professional Responsibility Lawyers
  • Association of the Bar of the City of New York
  • International and National Board of Directors Israel Tennis & Education Centers
  • Committee on Character and Fitness, Supreme Court of the State of New York, First Judicial Department
  • Independent Judicial Screening Committee for the Supreme Court of New York County
  • Judiciary and Federal Courts Committees for the New York County Lawyers Association
  • Justice Circle, Aspen Institute
  • Law Advisory Committee of Fordham University School of Law
  • National Arbitration and Mediation (NAM) Panel of Arbitrators and Mediators
  • New York Bar Foundation Fellow
  • New York State Bar Association
  • Task Force of the New York State Unified Court System’s Pro Bono Scholars Program, which provides law students with the opportunity to dedicate their last semester of law school to performing full-time pro bono service for the poor.
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