Nathanson, John A.

John A. Nathanson


John Nathanson is a partner in the firm’s Litigation Group.  His practice focuses on United States Department of Justice inquiries, Securities and Exchange Commission and other regulatory matters, internal investigations and civil securities litigation.

Prior to joining the firm in 2009, Mr. Nathanson served for five years as an Assistant United States Attorney in the Eastern District of New York, where he was assigned to the Business and Securities Fraud Unit for four years.  Mr. Nathanson also served as Acting Deputy Chief of the General Crimes Unit.  During his time at the U.S. Attorney’s Office, Mr. Nathanson investigated and prosecuted numerous securities fraud matters, including cases involving CDOs (Bear Stearns asset managers), options backdating, private investment in public equity (“PIPE”), insider trading and other complex accounting and securities frauds.

Before the U.S. Attorney’s Office, from 2001 to 2004, Mr. Nathanson served as an Assistant District Attorney in the Frauds Bureau of the Manhattan District Attorney’s Office.  While an ADA, Mr. Nathanson investigated and prosecuted securities and other business fraud cases, including the successful prosecution of brokerage D.H. Blair & Co., Inc. and several of its executives.  Prior to becoming an ADA, Mr. Nathanson worked as an associate at Clifford Chance, Rogers & Wells, primarily on complex securities litigation and investigation matters.

Mr. Nathanson was recognized in 2013-2015 by The Legal 500 for his white collar criminal defense work.  Most recently he was named a Litigation Star by Benchmark Litigation.

Selected Experience

  • Represent independent Directors of Wells Fargo in connection with the ongoing Sales Practices investigation.
  • Achieved a complete victory for Todd Newman, formerly of Diamondback Capital Management, when the US Supreme Court declined to rehear the government’s case after the Second Circuit’s landmark decision to overturn Mr. Newman’s conviction for insider trading and subsequent denial of the government’s petition for rehearing.
  • Represent European construction company in DOJ FCPA matter involving investigations in multiple countries.
  • Represent Citigroup in investigation of $400 million fraud at Banamex subsidiary, including internal investigation and representation of the Company before DOJ, SEC and other regulatory agencies.
  • Represent major financial institution in the DOJ’s ongoing FIFA anti-corruption investigation

Selected Publications

  • Co-author, “Trends and Strategies in Today’s White Collar Law Cases,” Inside the Minds: Managing White Collar Legal Issues, 2014
  • Co-author, “Strange Bedfellows: Insider Trading and Political Intelligence,” Bloomberg BNA, 2013
  • Co-author, “SEC's Cooperation Initiative: Should You Go Along to Get Along?” New York Law Journal, 2013
  • Co-author, “The Year Ahead: SEC Enforcement Outlook 2012,” BNA Publications, 2012
  • Co-author, “Fewer Corporate Prosecutions, A More Effective Approach?,” White Collar Law360, 2012
  • Co-author, “SEC Cooperation Initiative: Game Changer or Preserving Status Quo?,” New York Law Journal, 2011
  • Co-author, “Walking the Privilege Line,” New York Law Journal, 2009


  • University of Pennsylvania Law School, J.D., 1993
    • Journal of International Business Law
  • Williams College, B.A., 1989



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