Mattie F. Hutton


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Mattie Hutton specializes in product liability, mass torts, class actions, and other complex civil litigation. She represents a range of clients in investigations and at various stages of litigation, including discovery, trial, and appeal.

A skilled litigator, Mattie serves on trial teams defending major companies against high-value claims; in this capacity, she has led legal issue strategy and briefing, supervised local counsel, argued dispositive motions, and managed extensive affirmative and defensive discovery programs.

Mattie’s practice covers a range of issues, including fraud claims, contract disputes, consumer class actions, and products liability and consumer protection actions in state and federal courts. For example, recently, she led litigation in several states on behalf of leading pharmaceutical companies involved in the opioid crisis, served on the trial team defending a major medical device manufacturer in a consumer fraud bench trial against the California Attorney General, and was embedded law, motions, and appellate preservation counsel in a nine-week product liability jury trial.



  • Spanish


Bar Admissions

  • California
  • District of Columbia

Court Admissions

  • US District Court for the Northern, Central and Southern Districts of California
  • United States Court of Appeals for the Second and Fourth Circuits


  • Georgetown University, J.D.: cum laude, Barristers’ Council; Administrative Editor, American Criminal Law Review; Street Law Clinic
  • Stanford University, M.A., Communication
  • Stanford University, B.A., Political Science

Professional Activities


  • Honorable Robert Chambers, US District Court, Southern District of West Virginia 
  • Senate Judiciary Committee, Subcommittee on Homeland Security and Terrorism


  • “Jurisdictional Tactics: Will the Courts Allow Plaintiffs to Circumvent CAFA’s Mass Action Provision and Keep Mass Torts in State Courts?” California Litigation Review (2013)
  • Contributor, Appleseed Foundation, Practitioner Guide, “Protecting Assets and Child Custody in the Face of Deportation” (2017)
  • Representing major medical device and pharmaceutical companies in federal multi-district litigation, coordinated state proceedings, multi-plaintiff state proceedings, and state attorney general actions
  • Representing a major medical device company in motions practice, post-trial briefing, and on appeal
  • Representing a major medical device company in a multi-state state attorney general consumer fraud investigation
  • Defending a government-sponsored enterprise in securities class actions and ERISA litigation
  • Advising an industrial materials manufacturer on regulatory and litigation exposure
  • Defending a major health insurer in ERISA litigation, resulting in dismissal of all claims
  • Defending major liability insurer in federal court appeal of multi-decade coverage litigation  

Pro Bono Matters

  • Representing advocacy organizations in constitutional challenges to state laws
  • Obtaining cancellation of removal for a detained permanent resident
  • Advising a not-for-profit health advocacy organization on health information privacy and regulatory compliance obligations
  • Conducting an internal investigation for a non-profit organization
  • Litigating and arguing a prisoner civil rights appeal in the Fourth Circuit, leading to a published decision revising district court procedures for supervising similar claims. 
  • Obtaining asylum for a detained adult applicant raising asylum and convention against torture claims, and securing derivative asylum for her young child
  • Representing multiple disability rights organizations as amicus in the Second Circuit
  • Litigating and arguing an immigrant rights matter in the Fourth Circuit, and filing petition for certiorari