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Harry K. Fidler

Harry K. Fidler

Senior Associate

Harry Fidler advises clients on internal and government investigations, as well as on commercial litigation in both federal and state courts. Mr. Fidler has represented clients under investigation by the Department of Justice (DOJ), the Securities and Exchange Commission (SEC), and the Public Company Accounting Oversight Board (PCAOB). He has experience assisting clients spanning a number of industries, including clients in the life sciences, technology, accounting, and manufacturing spaces.

Mr. Fidler also has experience assisting clients with complex litigation matters, including Article 78 proceedings in New York State court. He has advised clients on multi-million dollar lawsuits, and has extensive experience handling complex discovery and motion practice issues.

Mr. Fidler maintains an active pro bono practice focused on holding gun dealers accountable for their negligent acts, as well as on education, immigration, and criminal justice matters.

Mr. Fidler serves as co-Editor-in-Chief of Arnold & Porter's Enforcement Edge Blog

Mr. Fidler earned his JD from New York University School of Law where he served as an Article Editor for the Annual Survey of American Law. Prior to joining the firm, Mr. Fidler was a Judicial Intern for the Honorable Eric N. Vitaliano of the United States District Court for the Eastern District of New York. He also worked as a Student Advocate in the United States Attorney's Office for the Eastern District of New York-Civil Division.


  • Founder and partner in closed-ended investment company in arbitration asserting claims of breach of contract and breach of fiduciary duties.
  • Major transportation network company in an Article 78 action challenging a New York City agency's rulemaking.
  • Independent Corporate Directors in a class action alleging breach of fiduciary duty and securities law violations in connection with a merger.
  • Major accounting firm in a suit by a third party alleging negligent misrepresentation in connection with the issuance of an audit opinion.
  • Major transportation network company in a purported nationwide, statewide, and citywide class action alleging violations of the Americans with Disabilities Act, New York State Human Rights Law, and New York City Human Rights Law.
  • Utility in a multi-party lawsuit asserting claims of negligence, gross negligence, contribution, and claims under CERCLA, the OPA, and the N.J. Spill Act.


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  • J.D., New York University School of Law, 2015
  • B.A., Political Science, University of Pennsylvania, 2012, summa cum laude


  • New York
  • U.S. District Court, Eastern District of New York
  • U.S. District Court, Southern District of New York


  • Member, New York City Bar Government Ethics & State Affairs Committee