Philip Horton is a retired litigation partner with a practice that spanned a number of industries and areas of law. His practice included trial work in both the federal and state trial courts, as well as arbitration matters, appellate work, and administrative litigation before federal agencies. He has represented a number of clients in the communications sector including: a major telecommunications company, a major cable company, a national wireless carrier, an independent cable television channel, resellers of telecommunications services, an independent television station, and local governments.

Mr. Horton also maintained an active litigation practice in other areas. He has substantial experience in trademark litigation and has litigated trademark cases both in the courts and before the Trademark Trial and Appeal Board. He has also litigated cases in a wide variety of other areas, including antitrust, contracts, ERISA, breach of fiduciary duty, and church law. Finally, he has headed up Arnold & Porter’s pro bono program for many years and has handled numerous pro bono litigation matters, including four death penalty cases.


  • JD, Harvard Law School, 1980, magna cum laude
  • AB, Yale University, 1977, summa cum laude
  • District of Columbia
  • Numerous Federal Courts
  • Chair of Arnold & Porter’s Pro Bono Committee.  Arnold & Porter’s pro bono program is consistently ranked among the top five programs in the nation In addition to running our program, Mr. Horton has worked on countless pro bono matters.

  • Former President and current member of the Board of Trustees of the Legal Aid Society of the District of Columbia.

  • Member of the Board of Trustees and former officer of the Washington Council of Lawyers, which is a voluntary bar association dedicated to the encouragement of pro bono and public interest law.

  • Served on various committees of the DC Bar regarding pro bono and court reform.

  • Member of the American Bar Association Military Pro Bono Project Advisory Board.


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