Member of Management Committee, Managing Partner of New York Office

Matthew D. Ingber

Global Investigations & White Collar Defense, Commercial Litigation, Securities Litigation & Enforcement

"He is an excellent oral and written advocate. He also sees the bigger picture and provides practical, common sense advice on extremely difficult matters."

"He gives A+ attention and service. His acumen as a strategist and a litigator is exceptionally high.”

“He sees the bigger picture and provides practical, common-sense advice on extremely difficult matters."

Chambers USA


A National Law Journal "Litigation Trailblazer," American Lawyer "Litigator of the Week," three-time Law360 "MVP," and Chambers-ranked securities and commercial litigator, Matthew Ingber is Managing Partner of Mayer Brown’s New York office, where he has practiced for more than 20 years. Matthew previously served as a co-leader of the firm’s global Litigation & Dispute Resolution and global Banking & Finance Litigation practices.

Matthew represents financial institutions, major corporations, technology companies and individuals in complex, sensitive and high-profile litigation matters. He conducts a general litigation practice before state and federal courts, with cases ranging from complex commercial disputes to civil and criminal securities fraud actions and cutting-edge intellectual property matters. Matthew performs internal corporate investigations on behalf of various boards and special committees, represents securitization trustees in residential mortgage-backed securities matters, represents technology companies in high stakes copyright infringement actions, represents issuers and underwriters in federal securities class actions, and represents individuals and corporations in connection with criminal and regulatory investigations and related civil proceedings. He has served as lead trial counsel in several cases in federal and state courts.


  • Represented Citibank in two-week bench trial and related appeal arising out of $1 billion mistaken wire transfer, resulting in return of all mistakenly-transferred funds. In re Citibank August 11, 2020 Wire Transfers, S.D.N.Y. 2020.
  • Represented James Im, a former CMBS bond trader at Nomura Securities International, in connection with an SEC-initiated lawsuit alleging federal securities fraud arising out of statements to trading counterparties about acquisition price and ownership. These allegations mirrored criminal charges brought by the DOJ against RMBS traders. After a two-week trial, a Manhattan jury determined that the SEC failed to prove that Mr. Im’s admitted lies amounted to even a civil violation.
  • Representing securitization trustees in several litigations, pending in various jurisdictions, arising out of their role as securitization trustee in residential mortgage-backed securities.

Formação Acadêmica

  • The George Washington University Law School, JD, with honors
    Articles Editor, The George Washington Journal of International Law and Economics
  • University of Pennsylvania, BA, magna cum laude with distinction


  • New York


  • US Court of Appeals for the Second Circuit
  • US District Court for the Northern District of Illinois
  • US Court of Appeals for the Tenth Circuit
  • US District Court for the Southern District of New York
  • US District Court for the Eastern District of New York


  • Member, Board of Directors, The Legal Aid Society
  • New York Lawyers for the Public Interest, Pro Bono Advisory Council, 2005 to date