Overview


Peg has served as first chair trial and appellate counsel in state and federal courts in over 30 jurisdictions. Her work has spanned antitrust, commercial, class action, environmental, insurance, mass tort, product liability and reinsurance disputes. Peg has taken numerous cases to verdict/judgment before juries, judges and arbitration tribunals. Many of her cases have involved high-profile public policy issues from the Agent Orange litigation in the 1980s, environmental and Superfund litigation involving such notorious sites as Love Canal and the Hudson River in the 1990s, to sexual abuse, 9/11, antitrust, healthcare, ERISA and COVID-19 litigation in the 21st Century.

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Results


  • Lead trial counsel for defendant fiduciaries in eight day ERISA class action bench trial. Obtained rulings denying all injunctive relief and 97% of damages sought
  • Lead trial counsel for defendant healthcare system defeating governmental effort to enjoin hospital closure; various representation of healthcare systems in contractual and regulatory disputes
  • Lead trial counsel for plaintiff trade association in a two-week federal jury trial involving a nationwide retirement program for municipal workers. Verdict returned for client on all counts. Summary affirmance in DC Circuit

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Recognitions


  • Benchmark Litigation
  • Benchmark Litigation National, Litigation Star, Top 250 Women in Litigation
  • The Best Lawyers in America 2008 to 2021, Commercial Litigation, Insurance Law and Litigation – Environmental

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Credentials


Education
University of Notre Dame, JD
St. Lawrence University, BA, cum laude

Admissions
District of Columbia

Courts/Agencies
US Supreme Court
US Court of Appeals for the Federal Circuit
US Court of Appeals for the District of Columbia Circuit
US Court of Appeals for the Second Circuit
US Court of Appeals for the Third Circuit
US Court of Appeals for the Fifth Circuit
US Court of Appeals for the Sixth Circuit
US Court of Appeals for the Seventh Circuit
US Court of Appeals for the Tenth Circuit
District of Columbia Court of Appeals

Margaret H. Warner

Insights & Events / Media

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