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Margaret Dunlay Terwey
Margaret Dunlay Terwey
Senior Associate — Litigation
Senior Associate — Litigation

Margaret Dunlay Terwey

Margaret Dunlay Terwey

Trammell Crow Center
2001 Ross Avenue
Suite 3900
Dallas, TX 75201

Margaret Dunlay Terwey

Securities and M&A Litigation

  • (Del. Ch.); (Del.) — Member of trial team that obtained opinion permitting Energy Transfer Equity, LP to terminate merger agreement with The Williams Companies based on failure of condition precedent relating to the provision of a tax opinion; decision was affirmed by the Delaware Supreme Court 

  • (Del. Ch.) —  Member of trial team that secured a trial victory on behalf of Energy Transfer Equity, L.P. in the Delaware Court of Chancery after the court rejected unit holder effort to unwind a March 2016 issuance of convertible preferred units; the court issued a 78-page post-trial opinion refusing to rescind the issuance and allowing the conversion to go forward per the terms of the units

  • (Del. Ch.) — Represented oilfield services company in expedited breach of contract proceeding

  • (S.D. Tex.) — Defended retailer and certain of its officers in federal securities class action and derivative lawsuits in Texas federal court alleging violations of Section 10(b) of the Securities Exchange Act arising from restated financials  

  • (Tex. Dist. Ct.) Secured early dismissal of complaint asserting direct and derivative breach of fiduciary duty claims against shareholder and former bank CEO

  • (Multiple Federal District Courts) Advised Fortune 1000 energy company regarding shareholder litigation arising from its multi-billion dollar sale to major multinational energy corporation

  • (FDIC); (5th Cir.) — Member of trial team defending former President and CEO of Texas-based federally chartered bank in two-week trial of removal proceedings and civil money penalties on basis of alleged breach of fiduciary duties and unsafe and unsound banking practices  

  • (Texas Department of Banking) — Achieved favorable settlement for bank chairman in Texas Department of Banking enforcement proceeding 

  • (5th Cir.); (E.D. Tex.) – Obtained affirmance of dismissal of RICO, conspiracy, tortious interference, and defamation claims against local newspaper and its employees and owner

  • (Tex.) – Obtained reversal of lower appeals court decision against The Dallas Morning News in a defamation case arising out of a series of investigative articles on alleged healthcare fraud

  • (Tex. App. – Waco) – Favorably settled litigation with a county appraisal district over the value of a major generator’s nuclear power plant, after joining the case as appellate counsel subsequent to an unfavorable trial court judgment that valued the plant at over $2 billion 

  • (Tex. Dist.) — Represented national broadcaster in defending against defamation claim based on investigative news report 

  • (N.D. Tex.) — On a pro bono basis, secured return of child in international child abduction case under the Hague Convention

  • (5th Cir.) — On a pro bono basis, collaborated with Reporters Committee for Freedom of the Press on two amicus briefs filed in the Fifth Circuit addressing the applicability of Texas’s anti-SLAPP statute in federal court

  • On a pro bono basis, secured asylum for minor child fleeing persecution in his home country


  • University of Michigan Law School, J.D., magna cum laude, 2013 (Contributing Editor, Michigan Law Review; Order of the Coif; Phi Kappa Phi Honor Society; Federal Appellate and Criminal Appellate Clinics)
  • Princeton University, A.B., Princeton School of Public and International Affairs, 2009
  • Judicial clerk to The Honorable David C. Godbey, U.S. District Court for the Northern District of Texas, 2013-2014
  • Judicial clerk to The Honorable Catharina Haynes, U.S. Court of Appeals for the Fifth Circuit, 2014-2015
  • Selected to the Northern California Rising Stars list, Super Lawyers (Thomson Reuters), 2019
  • Selected to the Texas Rising Stars list, Super Lawyers (Thomson Reuters), 2020 and 2021
  • Member: Dallas Bar Association; Dallas Association of Young Lawyers
  • Interviewer: Princeton University Dallas/Fort Worth Alumni Schools Committee
  • Member: American Bar Association, Past Young Lawyers Division — Liaison to the Forum Committee on Communications Law
  • Texas
  • California
  • all U.S. District Courts in Texas
  • U.S. District Court for the Northern District of California
  • U.S. Court of Appeals for the Fifth Circuit
  • “Even After Section 230 Defense Doesn’t Work Out for, Federal Court Finds No Relationship Status with Plaintiff,” V&E High-Tech Law & Litigation E-communication, March 24, 2017 (co-author)
  • “Defamation and Online Publication,” LSC-Tomball Free Speech Week, October 2015