John C. Quinn



  • B.A., Yale University, 2007
  • J.D., Harvard University, 2010
    magna cum laude


  • Hon. John R. Padova, U.S. District Court for the Eastern District of Pennsylvania

Fellowships, Leaderships & Recognition

  • Board Member, Ali Forney Center
  • New York Super Lawyers, 2019
  • Top Attorney, New York Metro Area's Outstanding Young Lawyers 2017
  • Addison Brown Prize, Harvard Law School
  • Joseph H. Beale Prize, Harvard Law School
  • Symposium Co-Chair and Submissions Editor, International Law Journal
  • Student Attorney, Harvard Law School Criminal Justice Institute
  • Teaching Fellow, Harvard College

Bar and Court Admissions

  • U.S. District Court for the Southern District of New York and Eastern District of New York
  • U.S. Court of Appeals for the Second and Third Circuits
  • New York

John Quinn is a partner at Kaplan Hecker & Fink LLP. He represents companies, institutions, and individuals in high-profile civil litigation and leads the firm’s efforts in a number of progressive public interest matters.

John was one of the founders of Kaplan Hecker & Fink in 2017. Since the firm’s launch, John’s civil litigation practice has involved representing Airbnb in obtaining a preliminary injunction under the Fourth Amendment to block implementation of a New York City ordinance that would have required Airbnb to turn over massive amounts of data about its users on a monthly basis; defending Gigi Hadid and Ariana Grande in copyright lawsuits brought by paparazzi; and navigating a prominent hotel developer through complex multi-jurisdictional litigation and arbitration proceedings. He has also worked to advise a large hedge fund on multiple matters involving potential litigation, negotiate a complex settlement to multiple disputes involving a renowned art estate, and manage the firm’s defense of Amber Heard in a $50 million defamation lawsuit brought by her ex-husband, Johnny Depp.

John has also spearheaded the development and filing of a massive RICO case against President Trump and his family and businesses, worked on multiple amicus briefs filed in the United States Supreme Court in cases challenging various executive actions by the Trump administration, and represented a student-led LGBT pride organization in Starkville, Mississippi. In Starkville, John led a successful constitutional challenge to the city’s denial of a parade permit—and then flew to Starkville to help lead the parade. John regularly argues in state and federal courts and has extensive experience managing large litigation matters, meeting with government agencies, and advising senior executives of major institutions.  

Prior to helping launch Kaplan Hecker & Fink, John spent six years in the litigation group at Sullivan & Cromwell LLP, where his work included representing Microsoft in a multi-billion-dollar jury trial, working with a hedge fund to raise concerns about a global multi-level marketing company, and representing an international financial institution in a criminal investigation into corruption in international soccer broadcasting. 

John is a member of Kaplan Hecker & Fink’s diversity and inclusion committee and is heavily involved in the firm’s recruiting, training, and professional development programs. John is proud to serve as a member of the board of the Ali Forney Center, the largest LGBT youth homeless shelter and community center in the country. John has also been active in the mentoring of LGBT associates and law students and has invested substantial time coaching high school mock trial programs. 

John clerked for the Honorable John R. Padova in the United States District Court for the Eastern District of Pennsylvania in his hometown of Philadelphia. He is a magna cum laude graduate of Harvard Law School, where he was awarded the Joseph H. Beale Prize for excellence in Conflict of Laws and the Addison Brown Prize, a prize awarded biannually or annually for an outstanding essay relating to private international law or maritime law. During law school, John served as a Teaching Fellow at Harvard College for a course on constitutional law, assisted Iraqi refugees in need of priority resettlement, collaborated in the development of violence mitigation programs for Sudanese refugee youth in Cairo, and represented clients in criminal proceedings in Roxbury and Dorchester through the Harvard Criminal Justice Institute. John also won a national championship as a member of the Harvard Criminal Justice Institute trial team. John is an Honorary Overseas Member of the Commercial Bar Association of London

Read about John C. Quinn in our Newsroom

Published on: May 18, 2020

Trumps Can't Delay Fraud Suit Any Longer, Judge Rules

President Donald Trump and three of his children can't push off facing a putative class action accusing them of widespread fraud, a New York federal judge ruled Monday, rejecting the Trumps' recent... Read More
Published on: April 22, 2020

Trumps' Latest 'Stall Tactic' Should Be Rejected, Investors Say

The plaintiffs in a putative class action accusing President Donald Trump and three of his children of widespread fraud said Monday that the Trumps' recent bid for a midcase appeal is yet another... Read More
Published on: April 17, 2020

Litigators of the Week: How Kaplan Hecker Duo One-Upped the Trumps in Fraud Suit

'At its core our case is straightforward: The Trumps deliberately made false and misleading statements in exchange for millions of dollars in payments that were not disclosed to investors who relied... Read More