Shearman And Sterling

John A. Nathanson is a partner in the firm’s Litigation practice. His practice focuses on United States Department of Justice (DOJ) inquiries, Securities and Exchange Commission (SEC) and other regulatory matters, internal investigations and financial 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 has been recognized by The Legal 500 for his white collar criminal defense work. In Benchmark Litigation’s 2022 guide, Mr. Nathanson was named a “Litigation Star” and a “National Practice Area Star.”