Margaret H. "Peg" Warner

Margaret H. "Peg" Warner

McDermott Will & Emery

Recognized since 2008

Washington, District of Columbia

Practice Areas

Commercial Litigation

Insurance Law

Litigation - Insurance

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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, healthcare, 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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Contact & Links
  • The McDermott Building
    500 North Capitol Street, NW
    Washington, DC 20001-1531
  • University of Notre Dame, J.D., graduated 1981

McDermott Will & Emery
Headquarters: Chicago, Illinois

196 The Best Lawyers in America® awards

115 Best Lawyers: Ones to Watch® in America awards

Best Law Firms Badge Visit Website View Firm Profile

Recognized in The Best Lawyers in America® 2024 for work in:
  • Commercial Litigation
  • Insurance Law
  • Litigation - Insurance
Additional Areas of Practice:
  • Litigation - Environmental


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