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Horner, James R.

James R. Horner

Managing Associate
  • Commercial Litigation and Disputes
  • Supreme Court, Appellate, and Litigation Strategies

Biography

JAMES HORNER focuses his practice on commercial litigation and disputes.

Prior to joining Sidley, James was a law clerk to the Honorable David S. Tatel of the U.S. Court of Appeals for the D.C. Circuit and the Honorable Alison J. Nathan of the U.S. District Court for the Southern District of New York.

Credentials

Admissions & Certifications
  • U.S. Court of Appeals, 2nd Circuit
  • U.S. Court of Appeals, 3rd Circuit
  • U.S. Court of Appeals, 9th Circuit
  • U.S. District Court, E.D. of New York
  • U.S. District Court, S.D. of New York
  • New York
Education
  • Yale Law School, J.D., 2019
  • Columbia University, B.A., 2015, Magna Cum Laude, Phi Beta Kappa
Clerkships
  • David S. Tatel, U.S. Court of Appeals, D.C. Circuit (2020-2021)
  • Alison J. Nathan, U.S. District Court, S.D. of New York (2019-2020)

News & Insights

  • Featured in, “Litigator of the Week Runners-Up and Shout-Outs,” The AmLaw Litigation Daily, December 5, 2025.
  • Author, “Haymond's Riddles: Supervised Release, the Jury Trial Right, and the Government's Path Forward,” American Criminal Law Review, Spring 2020.
  • Author, “Code Dodgers: Landlord Use of LLCs and Housing Code Enforcement,” Yale Law and Policy Review, Spring 2019.
  • Co-author, “The Reach of Local Power,” Yale Law Journal Forum, December 6, 2018.