John T. "Trey" Cox III

John T. "Trey" Cox III

Dallas, TX recognized lawyers icon Recognized in Best Lawyers since 2010
Gibson, Dunn & Crutcher LLP

220 Best Lawyers awards

Gibson, Dunn & Crutcher LLP logo

Awarded Practice Areas

Energy Regulatory Law Commercial Litigation Litigation - Intellectual Property Litigation - Securities
*Named the "Lawyer of the Year" in this practice area in the 2026 edition in Dallas/Fort Worth.

Biography

Trey Cox a litigation partner with Gibson Dunn. He is an accomplished and sought after advocate and trial lawyer. He has spent his entire professional life as a courtroom attorney and litigator helping clients resolve large, complicated and often high-profile business disputes. His courtroom experience is unusually broad and extensive. He has tried over 35 cases involving trade secrets, breach of fiduciary duty, securities fraud, product liability, trademark, insurance coverage, energy, oil and gas and partnership disputes. He has achieved success for a variety of clients – both defendants and plaintiffs, from big energy companies to a lone individual businessman battling the odds.Mr. Cox is consistently recognized as one of the top civil trial lawyers in America.

For over a decade, he’s been listed as one of the “Best Lawyers In America”, a “Leader in His Field” by Chambers USA, one of the “Top 100 Super Lawyers in Texas” and a Benchmark Litigation Star. He is a fellow of the American Board of Trial Advocates and the Litigation Counsel of America. His jury trial experience and courtroom success have earned him the distinction of being double Board Certified in Civil Trial and Civil Pre-Trial by the National Board of Trial Advocacy.

Mr. Cox’s cases have been featured in The Wall Street Journal, The New York Times, The Los Angeles Times, The Dallas Morning News, Bloomberg News and the Houston Chronicle, among many other publications. His last trial – a commercial plaintiff-side partnership dispute in 2019 — was recently recognized as one of the Top 20 Verdicts in Texas. Mr. Cox has handled cases from both cradle to grave and dropped in thirty days before a trial to lead the attack. His trial experience provides a real advantage in focusing the entire preparation process on what matters most — how to effectively and efficiently marshal the proof to prevail on the key issues.

Mr. Cox is active outside of the courtroom as well; he is committed to serving the legal profession. Progressive and innovative, he has earned a reputation as a thought leader in using technology to create clear, memorable and persuasive jury communication. His focus is on courtroom presentations that make judges and juries take notice. He has lectured throughout the country and authored numerous legal articles, white papers, and books. He has served as a featured lecturer at many of the nation’s top law schools, including University of Virginia School of Law, University of Texas School of Law and SMU Dedman School of Law. Following each of his jury trials, he interviews the jurors to understand and analyze their decision-making and thought process. With the help of a former Texas state court judge, he has turned these interviews and insights into a book, The Jury Rules: The Rules Every Juror Wants Every Trial Lawyer To Know and Use.

Mr. Cox received a B.A., magna cum laude, from Washington & Lee University, and his J.D., from the University of Virginia School of Law. After graduation, he clerked for the Honorable Jacques L. Wiener, Jr. of the United States Court of Appeals for the Fifth Circuit.

Gibson, Dunn & Crutcher LLP

220 Best Lawyers awards

Gibson, Dunn & Crutcher LLP logo

Overview

  • University of Virginia, J.D., graduated 1995
  • Washington and Lee University, graduated 1992
  • University of Virginia, graduated 1995

  • Texas, State Bar of Texas
  • Georgia, State Bar of Georgia

  • American Bar Association - Member
  • Bar Association of the Fifth Federal Circuit - Member
  • Dallas Board of Trial Advocacy - Member
  • Litigation Counsel of America - Member
  • National Institute for Trial Advocacy - Faculty
  • Southern Methodist University Law School - Faculty
  • State Bar of Texas - Member

  • United States Court of Appeals
  • Texas, State Bar of Texas
  • Georgia, State Bar of Georgia
  • American Bar Association - Member
  • Bar Association of the Fifth Federal Circuit - Member
  • Dallas Board of Trial Advocacy - Member
  • Litigation Counsel of America - Member
  • National Institute for Trial Advocacy - Faculty
  • Southern Methodist University Law School - Faculty
  • State Bar of Texas - Member
  • University of Virginia, J.D., graduated 1995
  • Washington and Lee University, graduated 1992
  • University of Virginia, graduated 1995
  • United States Court of Appeals

Client Testimonials

Awards & Focus

Lawyer of the Year Badge - 2026 - Energy Regulatory Law
Named "Lawyer of the Year" by Best Lawyers® for:
  • Energy Regulatory Law, Dallas/Fort Worth (2026)
Recognized in The Best Lawyers in America® 2026 for work in:
  • Commercial Litigation
  • Energy Regulatory Law
  • Litigation - Intellectual Property
  • Litigation - Securities
Additional Areas of Practice:
  • Arbitration
Awards:
  • "Leader in His Field" in Chambers & Partners’ Chambers USA Guide to Leading Lawyers – General Commercial Litigation (Texas), 2009-2011
  • Listed as a "Texas Super Lawyer" by Law & Politics (as seen in Texas Monthly), 2004-2011
  • Selected by The Dallas Business Journal as a "Defender" in 2008, and "One of the 10 Metroplex Litigators Worth Having on Your Side"
  • Recognized by his peers in D Magazine as a "Best Lawyer Under 40" for five consecutive years
  • AV-rated by Martindale-Hubbell
  • Named one of the "Best and Brightest Business Leaders" in The Dallas Business Journal’s "40 Under 40" survey

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