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Daniel M. Horowitz



Daniel Horowitz maintains a wide-ranging complex commercial litigation practice with particular emphasis on large-scale business disputes, antitrust, and constitutional actions. His numerous matters include representing a Fortune 500 company in antitrust actions brought by some of the nation’s largest retailers, challenges to the constitutionality of New York legislation, and representation of an insurer in coverage disputes against distributors of opioids. In his active pro bono practice, Daniel has represented incarcerated individuals seeking to vindicate their constitutional rights, asylum seekers, and clients in divorce actions through Her Justice.

Before joining Holwell Shuster & Goldberg, he served as a judicial law clerk to the Hon. Priscilla R. Owen of the U.S. Court of Appeals for the Fifth Circuit, and the Hon. Frederic Block of the U.S. District Court for the Eastern District of New York. A film and television production major at New York University, before law school, Daniel worked in the independent film industry in New York.

Notable Cases

Notable Cases

  • Visa Inc. and its subsidiaries in various matters, including their defense against class and individual antitrust actions brought by virtually every merchant in the United States and alleging hundreds of billions of dollars in damages.
  • Various affiliates of Chubb in nationwide litigation with manufacturers and distributors of opioids, and national pharmacy chains that sold opioids, over insurance coverage for over 3,000 lawsuits brought by governmental entities across the country.
  • The Public Campaign Financing and Election Commission of the State of New York and its Commissioners in a challenge to recommendations the Commission issued to establish a public campaign financing program for elections in New York State.
  • A FinTech firm on antitrust issues connected to the formation of a joint venture of some of the world’s largest asset managers.
  • Pro bono representations of multiple inmates in § 1983 actions involving unconstitutional conditions of confinement.
  • Pro bono representation of an asylum seeker in a successful appeal to the United States Court of Appeals for the Fifth Circuit and the Board of Immigration Appeals.

News and Writings


  • The Death and Resurrection of the Required-Records Doctrine, 86. Miss. L.J. 513 (2017) (co-authored with Stephen K. Wirth)
Photo of Daniel M. Horowitz


  • Hon. Frederic Block, U.S. District Court for the Eastern District of New York, 2015 – 2016
  • Hon. Priscilla R. Owen, U.S. Court of Appeals for the Fifth Circuit, 2014 – 2015


Cornell Law School (J.D., summa cum laude, 2014; Order of the Coif; Charles Evans Hughes Scholar; Articles Editor, Cornell Law Review; Champion, 2012 Cuccia Cup Moot Court Tournament; Executive Bench Editor, Cornell Moot Court Board)

New York University (B.F.A., 2009, with honors)

Bar and Court Admissions

  • New York
  • U.S. Court of Appeals, Second Circuit
  • U.S. Court of Appeals, Fifth Circuit
  • U.S. District Court, Eastern District of New York
  • U.S. District Court, Southern District of New York
  • U.S. District Court, Western District of Texas 
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