Stephanie Cagniart



P: +1.512.322.2537
F: +1.512.322.3637
Stephanie Cagniart Photo

Stephanie Cagniart represents clients in a broad range of complex litigation matters, including securities litigation, oil and gas matters, contract disputes and general commercial litigation. She has experience in a variety of state and federal trial courts. She has also argued before multiple courts of appeals including the Texas Supreme Court and the United States Courts of Appeals for the Fifth and Sixth Circuits, and has briefed cases in numerous federal and state appellate courts and to the United States Supreme Court.

Ms. Cagniart has been recognized as a "Rising Star" in appellate litigation in 2018-2021 by Texas Super Lawyer (Thomson Reuters), a "Next Generation Partner" in 2022 and "Rising Star" in Dispute Resolution: General Commercial Disputes by The Legal 500 U.S., and a "Top Woman Attorney in Texas, Rising Star" in appellate litigation in 2022 by Texas Monthly. In 2020-2022, Austin Monthly Magazine named Ms. Cagniart one of Austin's top attorneys in appellate litigation. She is a Lecturer at the University of Virginia School of Law, teaching persuasion in verbal communication.

Before joining Baker Botts, Ms. Cagniart served as a law clerk to the Honorable Patrick E. Higginbotham on the United States Court of Appeals for the Fifth Circuit, and as an intern for the Honorable Sam Sparks of the United States District Court for the Western District of Texas. Ms. Cagniart was also a member of the University of Virginia's Supreme Court Litigation Clinic, with which she briefed four cases that were argued before the United States Supreme Court during the 2010-2011 Term.

Ms. Cagniart was raised in Paris, France, and is a native speaker of both French and English. As an undergraduate student at The University of Texas at Austin, she earned four national championships in public speaking. Ms. Cagniart completed her master's Thesis in legal and political history, Disunion and Party Politics in the Early Republic: James Madison, the Embargo, and the Election of 1808, under advisors Peter Onuf and Charles McCurdy at the University of Virginia.

Related Experience

  • Representation of an SEC receiver in numerous litigation matters, including matters in the District Court for the Northern District of Texas, the United States Courts of Appeals for the Fourth and Fifth Circuits, the Texas Supreme Court, and the United States Supreme Court, arising out of a securities fraud
  • Representation of plaintiff in Janvey v. Maldonado, a breach of fiduciary duty case by an SEC Receiver in the United States District Court for the Northern District of Texas
  • Representation of prevailing petitioner in the U.S. Supreme Court in Food Marketing Institute v. Argus Leader Media (U.S. 2019), a case involving Exemption 4 to the Freedom of Information Act and recognized as the “United States Supreme Court – Impact Case of the Year” by Managing IP
  • Representation of a national financial services firm in Texas trial and appellate courts, including the Texas Supreme Court, in fraud and negligent misrepresentation claims alleging $4 billion in damages related to the lease of oil and gas interests in the landmark case JPMorgan Chase Bank v. Orca Assets
  • Representation of national telecommunications firm in Texas trial court in a lawsuit involving trade secret misappropriation, breach of contract, fraudulent inducement, common-law fraud, and negligent misrepresentation claims
  • Representation of a national beverage company in the United States Court of Appeals for the Fifth Circuit in an emergency petition for writ of mandamus staying an ex parte temporary restraining order in a trademark dispute that would otherwise have prevented a nationwide product launch, in Laboratorios Pisa S.A. v. PepsiCo., Inc.
  • Representation of a helicopter purchaser in Texas trial court bringing breach of contract, fraud, and breach of warranty claims against the manufacturer following a fatal accident involving a helicopter of the same design
  • Representation of energy company in a gas-royalty class action lawsuit before a federal district court and the United States Court of Appeals for the Eighth Circuit
  • Representation of a financial services firm in the United States District Court for the Eastern District of Texas in a lawsuit involving claims under the Computer Fraud and Abuse Act, the Electronic Communications Privacy Act, and the Lanham Act, and allegations of trademark infringement, tortious interference, unfair competition, and conversion
  • Representation of two foreign citizens in an enforcement action and preliminary injunction proceedings by the Commodity Futures Trading Commission in the United States District Court for the Southern District of Florida
  • Representation of a leading provider of reloadable prepaid debit cards in Texas state appellate court in suit involving allegations of breach of contract, fraud, negligence, and claims for declaratory relief
  • Representation of an energy company in the Texas Supreme Court in a case involving tort and contract claims, including injuries to land
  • Representation of non-profit corporation in federal district court in a suit alleging employment discrimination and retaliation 
  • Representation of a manufacturer of fracking equipment before the District Court for the Western District of Texas in a lawsuit involving breach of contract and fraud claims
  • Representation of national retailer of natural gas, electricity and green energy in Texas trial and appellate courts in employment and arbitration dispute
  • Representation of a parent in a child-support dispute before the Texas Supreme Court
  • Representation of a Texas property management company in an arbitration proceeding involving employment discrimination and Family and Medical Leave Act claims
  • Representation of multiple individuals and entities in proceedings for a writ of certiorari before the United States Supreme Court

Pro Bono

  • Representation of a federal prisoner, pursuant to an appointment under the Criminal Justice Act, in an appeal to the Sixth Circuit challenging his convictions and sentence under the Fourth and Fifth Amendments
  • Representation of an Ugandan political activist seeking asylum  in the United States in immigration court
  • Representation of a former member and Chair of the Federal Election Commission in an amicus brief to the United States Supreme Court in support of a petition for writ of certiorari regarding limits on contributions to political committees under federal campaign-finance law
  • Representation of 34 former Immigration Judges and Board of Immigration Appeals Members in an amicus brief to the Fifth Circuit supporting the publication of a panel opinion granting relief to a Honduran citizen and her four-year-old daughter who sought asylum following the murder of her husband
  • Representation of three young children from Guatemala seeking asylum before the Board of Immigration Appeals
  • Representation of a petitioner before the Texas Supreme Court, challenging a lower court ruling that petitioner had lost her right to judicial review when she followed a state agency's formally promulgated rules and that the agency violated a violative of petitioner's constitutional right to due course of law 
  • Representation of a prisoner who suffered a traumatic brain injury while in custody in a medical malpractice claim in federal court
  • Recipient of the Baker Botts Judge Thomas Gibbs Gee Award for Outstanding Pro Bono Service (2017)
  • Selected as a member of the Pro Bono College of the State Bar of Texas (2019-2021)

Awards & Community

Recognized by The Legal 500 U.S. as a "Next Generation Partner" (2022) and a "Rising Star" (2020-2021) in Dispute Resolution: General Commercial Disputes

Recognized as a Texas Super Lawyer-Rising Star in appellate litigation (Thomson Reuters), 2018-2021

Recognized by Texas Monthly as a "Top Woman Attorney in Texas-Rising Star" in appellate litigation, 2022

Recognized by Texas Lawyer for her work in the Janvey v. Maldonado case ranked the #1 verdict in the securities category and #7 overall, July 2016

Recognized as one of Austin's Top Attorneys in Appellate Litigation by Austin Monthly Magazine, 2020-2022


results Page of

Thought Leadership

results Page of

Whirlwind Product Launch Battle: Branding, Trial, and Appellate Teams Help Secure PepsiCo’s Launch of Gatorlyte

Speeches & Presentations

Whirlwind Product Launch Battle: Branding, Trial, and Appellate Teams Help Secure PepsiCo’s Launch of Gatorlyte, Baker Botts Tech Talks