Samuel Cooper

Samuel Cooper


Sam is Energy and Infrastructure Sector Lead and focuses on the representation of multinational companies, boards of directors, and individuals in complex commercial disputes, including corporate governance and transaction litigation, securities and shareholder litigation, commercial arbitration, antitrust matters, and enforcement and internal investigations.

Sam has represented both plaintiffs and defendants in trials before juries, arbitrators and judges in state courts, international arbitral tribunals and three-judge federal panels. He represents clients across a wide array of industries, with a particular focus on energy, oil and gas, petrochemical, and private equity related disputes.

Prior to joining private practice, Sam was a law clerk for the Honorable J. Harvie Wilkinson III in the United States Court of Appeals for the Fourth Circuit.


Representative matters

Matters tried to a decision

U.S. subsidiary of a multinational company in an arbitration involving the interpretation of an $800 million buy-up provision with the client’s joint venture partner; secured a declaratory judgment in favor of client’s interpretation of the contract in all respects along with a discretionary award of attorney fees; tried before an International Center for Dispute Resolution panel.

Asset management company in a dispute arising out of its contract with a management company; secured dismissal of all tort claims along with judgment in favor of the client on its counterclaims; tried before an American Arbitration Association arbitrator.

Oilfield services company in a books and records dispute; secured denial of all the relief requested and an order estopping the requestor from initiating further litigation; tried before the Delaware Chancery Court.

Pro bono

Sam is committed to pro bono work and community engagement, evident through his active involvement in various board memberships and organizations. He serves on the Executive Committee of the Board of Visitors of the University of Texas McDonald Observatory, a unit of The University of Texas at Austin and one of the world's leading centers for astronomical research, teaching, and public education and outreach. Additionally, Sam is a Board member of Houston PetSet, an organization dedicated to combating homelessness among companion animals, showcasing his compassion and efforts to alleviate suffering in his community. Sam is also a member and past coordinator of the Houston Area Minerals Society, an organization dedicated to study in the areas of Earth Science and related fields and arts.

In 2023, Sam achieved a unanimous 8-0 victory in the Texas Supreme Court for his pro bono client, securing the right for the client's eldest daughter to be interviewed in a custody determination, as required by Texas law. Texas family law courts were routinely ignoring the interview requirement in contravention of Texas law and the best interests of children caught in custody litigation. The landmark decision ensures that interview rights for children in similar situations will be protected in the future. Sam took the case on appeal to the intermediate court of appeals, and successfully petitioned the Texas Supreme Court to review and reverse the intermediate court decision.

Published Work

  • Samuel Cooper, (2017), “Investment Disputes Involving the Renewable Energy Industry under the Energy Charter Treaty,” Global Arbitration Review: The Guide to Energy Arbitrations, Second Edition
  • Samuel Cooper, (2015), “Investment Disputes Involving the Renewable Energy Industry under the Energy Charter Treaty,” Global Arbitration Review: The Guide to Energy Arbitrations
  • Samuel Cooper, (2015), “Guideposts for Handling Corporate Investigations,” The American Bar Association’s Litigation Journal
  • Samuel Cooper, (2015), “Proactive Thinking About International White Collar Investigations: How to Mitigate Risks and Manage Key Issues,” International White Collar Enforcement

Speaking Engagements

  • Conference Co-Chair, “Sixth Annual Texas Legal Market Conference,” Sandpiper Partners LLC, September 2021
  • Moderator and Panelist, “Innovation in E-Discovery Conference,” Sandpiper Partners LLC, November 2018
  • Panelist, “Fourth Annual Houston Legal Market Conference,” Sandpiper Partners LLC, October 2018
  • Panelist, “Repeat Offenders: How to Mitigate the Risk of Recidivism with FCPA Compliance,” American Conference Institute’s Conference on the FCPA, January 2018

Leadership Positions And Professional Affiliations

  • Member, The American Law Institute
  • Life Fellow, Texas Bar Foundation
  • Member, The University of Texas at Austin McDonald Observatory and Department of Astronomy Board of Visitors
  • Member and past coordinator, the Houston Area Minerals Society
Samuel is a very skilled trial lawyer.
Chambers USA, 2023
He has huge credibility. He can guide clients to a soft landing but is tough if needs be.
Chambers USA, 2023


  • Recognized by Chambers USA in Litigation: Securities – Texas, 2006-2023
  • Recognized by Thomson Reuters as a “Texas Super Lawyer” in Business, Securities and Antitrust Litigation, 2004-2023
  • Recognized by The Best Lawyers in America in Litigation – Securities and Antitrust Litigation, 2008-2023
  • Recognized by The Legal 500 in General Commercial Disputes, M&A Litigation and Securities Litigation, 2017, 2021
  • Recognized by The Legal 500 in Financial Services Litigation, 2023
  • Recognized in Global Investigations Review’s GIR 100, 2018



Texas, 1995


United States Court of Appeals for the Fifth Circuit
United States Court of Appeals for the Eleventh Circuit
United States District Court for the Northern District of Texas
United States District Court for the Southern District of Texas
United States District Court for the Eastern District of Texas
United States District Court for the Western District of Texas


A.B., Harvard College, summa cum laude, 1990 
– Phi Beta Kappa
J.D., Stanford University, 1993
– Order of the Coif
– Managing Editor, Stanford Law Review
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.