People / Mark Trachtenberg
Trachtenberg Mark

Mark Trachtenberg

Mark Trachtenberg, who represents major companies in high-stakes appeals, is proud to be recognized by his peers as a top lawyer in his field. He was named as the 2023 Lawyer of the Year—Appellate Practice in Houston by The Best Lawyers in America directory. He was recognized as one of the top 100 lawyers in Texas and as one of the top appellate lawyers in the state by Texas Super Lawyers (Thomson Reuters). And he is ranked in Chambers USA, 2019-2022 (Chambers and Partners) for appellate law in Texas, which notes that he “is an excellent advocate” and is “super responsive, got up to speed with complex issues very quickly and did an excellent job of writing briefs that carried the day.”

Mark’s 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 in damages against a major oil company, and successfully defending the appeal of the take-nothing judgment in the Fifth Circuit
  • Successfully defending a Fifth Circuit appeal of a $3.6 billion bankruptcy plan of reorganization
  • Obtaining a reversal in the Texas Supreme Court of a $14 million products liability judgment
  • Prevailing on a special appearance that shielded the firm’s Singaporean client from a potential $500 million judgment

A highlight of Mark’s career has been his work on behalf of Texas public schools, an opportunity that arose from a law review article he authored on the history of Texas’s school finance litigation while at Yale Law School. Mark played a lead role in a lawsuit that resulted in an infusion of more than $2 billion for public schools in Texas. He later served as lead counsel at trial and on appeal for a coalition of 88 school districts in a second lawsuit challenging the constitutionality of the state’s school finance system.

Mark is a member of the American Law Institute, recently served as the chair of the Houston Bar Association’s Appellate Practice Section, and is on the board of directors of the Texas Supreme Court Historical Society. Mark is also dedicated to his community, serving as the chair of the Southwest Region of the Anti-Defamation League and on the Education Policy Committee of the United Way of Greater Houston.

Mark writes and speaks prolifically on a variety of topics, with a recent focus on arbitration issues, brief writing, and Fifth Circuit and Texas Supreme Court trends. He is board certified in civil appellate law by the Texas Board of Legal Specialization.

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  • Past Chair, Appellate Subcommittee of the Business and Corporate Litigation Committee of the American Bar Association's Business Law Section
  • Past Chair of the Appellate Practice Section of the Houston Bar Association
  • Member, Executive Committee of the Yale Law School Association, 2015-2017
  • Member, American Law Institute (ALI)
  • Board member, Houston Volunteer Lawyers, 2017-2018
  • Board member, Texas Supreme Court Historical Society
  • Board member, The Houston Lawyer editorial board, 2005-2011
  • Fellow, Texas Bar Foundation
  • Member, Education Council, United Way of Greater Houston
  • Frequent speaker at State Bar and Houston Bar Association Continuing Legal Education programs, on a variety of topics, including arbitration-related litigation, the Texas Supreme Court, school finance litigation, and oil and gas law
  • Chair, Anti-Defamation League, Southwest Region
  • Special Assistant Disciplinary Counsel, Texas Commission for Lawyer Discipline 
  • Recognized as a “Lawyer of the Year” – Appellate Practice – in Houston in The Best Lawyers in America, Woodward/White, Inc., 2023
  • Chambers USA, Chambers and Partners, Litigation– Appellate Practice – in Houston: Appellate, Texas, 2019-2022
  • Recognized in The Best Lawyers in America, Woodward/White, Inc., for Appellate and Commercial Litigation, 2016-2023
  • Board Certified in Civil Appellate Law, Texas Board of Legal Specialization
  • Recognized in 2022 for having been included in Super Lawyers, Thomson Reuters, top-attorney lists for 10 years or more
  • Recognized as one of the top 100 lawyers in Texas by Texas Super Lawyers, Thomson Reuters, 2020-2022
  • Recognized as one of the top 100 lawyers in Houston by Texas Super Lawyers, Thomson Reuters, 2016-2022
  • Selected for inclusion in Texas Super Lawyers, Thomson Reuters, 2013-2022
  • Selected for inclusion in Texas Super Lawyers - Rising Stars Edition, Thomson Reuters, 2004-2013
  • Named a Future Star in Benchmark Litigation, Euromoney Institutional Investor PLC, 2013-2022
  • Profiled in cover article of 2010 Texas Super Lawyers magazine - Rising Stars Edition, Thomson Reuters, 2010


J.D., Yale Law School, 1998, Editor, Yale Law Journal

B.A., University of Pennsylvania, 1994, summa cum laude; Phi Beta Kappa


Law Clerk, the Honorable Lee H. Rosenthal, United States District Judge for the Southern District of Texas (1998-99)



Court Admissions

United States Supreme Court

U.S. Court of Appeals for the Eleventh Circuit

U.S. Court of Appeals for the Fifth Circuit

U.S. Court of Appeals for the Ninth Circuit

U.S. District Court for the Eastern District of Texas

U.S. District Court for the Southern District of Texas

U.S. District Court for the Western District of Texas

Representative Matters
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Suillvan v. Feldman, 2022 WL 17822451 (S.D. Tex. Dec. 20, 2022) and 2023 WL 2392746 (S.D. Tex. Mar. 7, 2023).

In a case involving numerous overlapping arbitration awards, persuaded the Court to confirm the most favorable awards, reject the opposition's vacatur arguments, and enter a partial final judgment awarding our clients $99 million for their fiduciary duty, professional malpractice and conversion clai [...]

Diamondback E & P LLC v. Ridgefield Permian, LLC, No. 21-0497 (Tex. 2022)

Persuaded the Texas Supreme Court to deny review of two separate petitions for review (and a motion for rehearing) in an oil-and-gas dispute about the scope of a tax foreclosure deed

Sharifan v. Kelley, No. 14-20-00197-CV, 2022 WL1112804 (Tex. App.—Houston [14th Dist.] April 14, 2022).

Persuaded the court of appeals to vacate a $7 million arbitration award on the basis of evident partiality.

Travis Cnty. Cent. Appraisal Dist. v. Tex. Disposal Sys. Landfill, Inc., No. 03-20-00122-CV, 2022 WL 2236109 (Tex. App.—Austin June 22, 2022, no pet. h.).

Persuaded the Austin Court of Appeals to reverse the trial court’s orders dismissing Travis Central Appraisal District’s lawsuit on pleas to the jurisdiction. As a result, TCAD may proceed with its challenge to the Appraisal Review Board’s $20 million reduction to TCAD’s appraisal of a major commerc [...]

In re ExxonMobil Corporation, No. 20-0849, 2021 WL 5406052 (Tex. Nov. 19, 2021)

Persuaded the Texas Supreme Court to grant mandamus relief enabling the client to obtain discovery from third-party medical providers regarding amounts and rates paid or incurred by patients who were similarly-situated to plaintiffs. This discovery was sought in connection with client's defense agai [...]

AIG Europe, Ltd. v. Caterpillar Inc., 831 F. App'x 111 (5th Cir. 2020)

Persuaded Fifth Circuit to affirm a take-nothing summary judgment in favor of fracking engine manufacturer in products liability action seeking $15 million in damages arising from fire at a wellsite.

OOGC Am., L.L.C. v. Chesapeake Expl., L.L.C., 975 F.3d. 449 (5th Cir. 2020)

Represented in the trial court and Fifth Circuit a partner at a major law firm who had rendered an arbitration award that was later vacated by the district court, based on allegations that had acted improperly in agreeing to serve as an arbitrator. Our client sought to intervene in the lawsuit to ad [...]

Pike v. Texas EMC Management, LLC, 610 S.W.3d 763 (Tex. 2020)

Persuaded the Texas Supreme Court to vacate a $16.5 million judgment and deny injunctive relief in a highly contentious trade secret dispute. The suit was filed after the assets of a partnership, EMC Products, LP, were sold to our client VHSC in a foreclosure sale. Following the foreclosure, EMC Pr [...]

Orion Engineered Carbon LLC v. Haldor Topsoe

Successfully defended Tokai Carbon, Ltd. against one of its principal competitors, Orion Engineered Carbons, LLC, defeating a request for a temporary injunction that could have negatively impacted Tokai’s business. Following a full-day hearing and a post-hearing briefing, a Harris County court found [...]

Russell House Appellate Arbitration

Represented client injured on the job in a unique "appellate arbitration" proceeding arising from a $15 million arbitration award in our client's favor. After the defendant-employer appealed the initial award to a second arbitrator (per the parties' arbitration agreement), Haynes and Boone briefed [...]

Press Release
Haynes Boone, 16 Lawyers Recognized in 2023 Edition of Benchmark Litigation U.S.
October 06, 2022

Haynes and Boone, LLP and 16 of the firm’s lawyers are ranked in the Benchmark Litigation U.S. 2023 list of the nation’s leading litigation firms and lawyers, published by Euromoney Institutional Investor PLC. The firm is ranked in Tier 1 nationally in Insurance as one of the Top 8 insurance litigation firms in the country. In Texas, Haynes Boone was also “highly recommended,” the top tier, in L [...]