LAWYER PROFILE
Mark Trachtenberg

Mark Trachtenberg

USA 2026

Chambers ranking badge
Chambers ranking badge

Ranked in 1 practice area

About

Provided by Haynes and Boone, LLP

USA

Career

Mark Trachtenberg represents major companies in high stakes appeals. His list of major accomplishments for clients include obtaining reversal in the Texas Supreme Court of a $22 million tortious interference and trade secret misappropriation judgment; obtaining a summary judgment in a False Claims Act case in which the plaintiffs had sought billions of dollars in damages against a major oil company, and successfully defending the appeal of the take-nothing judgment in the Fifth Circuit; obtaining reversal in the Texas Supreme Court of a $14 million products liability judgment; and a successful school finance lawsuit that resulted in an infusion of more than $2 billion for public schools in Texas. Mark is a member of the American Law Institute and recently served as chair of the Appellate Practice Section of the Houston Bar Association. Outside the office, he serves on the Education Policy Committee of the United Way of Greater Houston and recently served as chair of the Southwest Region of the Anti-Defamation League. He is board certified in civil appellate law by the Texas Board of Legal Specialization.

Chambers Review

Provided by Chambers

Chambers Guide to the USA

Litigation: Appellate - Texas

Band 2
Band 2

Individual Editorial
Mark Trachtenberg has successfully represented clients before the Fifth Circuit and Texas Supreme Court, as part of his wide-ranging appellate practice.

Strengths

Provided by Chambers

  • Mark has always proven himself to be a sharp advocate. He displays a breadth of knowledge in a wide variety of legal areas.

    Litigation: AppellateChambers Guide to the USA
  • Mark is fantastic. He is incredibly smart, reasonable, honest and gives me real thoughts, not what he thinks I want to hear. He is also a strong advocate and displays strong client service.

    Litigation: AppellateChambers Guide to the USA
  • Mark has a keen ability to analyze unusual appellate procedural issues.

    Litigation: AppellateChambers Guide to the USA
  • Mark is a unique talent who is a real pleasure to work with. He inspires confidence and produces results.

    Litigation: AppellateChambers Guide to the USA
  • Mark is a very talented advocate. He is the kind of lawyer clients love as he's diligent, responsive, smart and has great judgment.

    Litigation: AppellateChambers Guide to the USA

Ranked Individuals at Haynes and Boone, LLP (125)

California

Colorado

District of Columbia

New York

North Carolina

Texas

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership