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New York, NY 10017

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Local Litigation Star

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With more than three decades of experience litigating in federal and state courts, Guy Petrillo is recognized as a leading advocate in securities and other civil litigation and regulatory and criminal matters. He routinely represents individuals, business entities, and non-profits in complex and sensitive matters, including parallel proceedings involving both private and government claims. Mr. Petrillo’s recent trials include a multi-week trial in U.S. Securities and Exchange Commission v. Duka, in which the SEC’s claims of fraud were entirely defeated at trial, and U.S. v. Shapiro, a securities and wire fraud case in which the jury acquitted on eight of nine counts of the indictment, failing to reach a verdict on the remaining count. Mr. Petrillo has also recently served as an arbitrator in a commercial dispute between two major pharmaceutical companies. In the federal appellate courts, Mr. Petrillo has served as counsel in more than 100 appeals focused on, among other subject areas, constitutional law, criminal law and procedure, director duties, asset forfeiture, and attorney sanctions. He has also represented business entities and individuals in adversary proceedings in bankruptcy court and in arbitration proceedings. 

Mr. Petrillo twice served in the U.S. Attorney’s Office for the Southern District of New York. Early in his career, he was an Assistant U.S. Attorney in the Criminal Division between 1990 and 1997, where he tried numerous cases through verdict and appeal and served as Chief Appellate Attorney, among other supervisory posts. After a decade of private practice, he returned to the Office in January 2008 as Chief of the Criminal Division. Mr. Petrillo co-founded Petrillo Klein & Boxer in January 2010. 

Mr. Petrillo was a Columbia University School of Law Lecturer in Law between 2010 and 2019, and has served on the Professional Responsibility and White Collar Crime Committees of the Association of the Bar of the City of New York. He has also served by appointment on the Criminal Justice Act Panel in the Southern District of New York, representing indigent clients in criminal proceedings. 

Recognized as leading practitioner by: 

  • Chambers USA (Band One, White Collar Individuals) 
  • The Best Lawyers in America© (Corporate Compliance Law & Criminal Defense, White Collar) 
  • Benchmark Litigation©, Litigation Star 
  • Who’s Who Legal, Global Investigations Review, Thought Leaders, Business Crime Defence 
  • Who’s Who Legal, Global Investigations Review, Business Crime Defence 
  • Who’s Who Legal, Global Investigations Review, Investigations 
  • Super Lawyers, Criminal Defense, White Collar 
  • Expert Guides, White Collar Crime 
  • Martindale-Hubble’s AV© Preeminent Rating 


Updated Sep 2021