Margaret Warner > McDermott Will & Emery LLP > Washington DC, United States > Lawyer Profile
McDermott Will & Emery LLP Offices

THE MCDERMOTT BUILDING, 500 NORTH CAPITOL STREET, NW
WASHINGTON, DC 20001-1531
DISTRICT OF COLUMBIA
United States
- Firm Profile
- Go to...
Margaret Warner

Work Department
Litigation & Dispute Resolution
Position
Margaret Warner 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. Margaret 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.
Please visit McDermott website for full biography: https://www.mwe.com/people/warner-margaret-h/
Lawyer Rankings
United States > Insurance > Advice to insurers
(Hall of Fame)Based primarily in Washington DC, the group at McDermott Will & Emery LLP has experience across a range matters impacting insurers, from coverage litigation to complex underwriting. Margaret Warner co-leads the team, a highly experienced insurance litigator who has handled matters concerning antitrust, class action, mass tort, product liability, reinsurance, and many other types of disputes at trial and appellate level. Other co-chair Ryan Smethurst is a go-to for policy drafting guidance and various contentious insurance matters, from high-profile class actions, tax, ERISA disputes, and insurance litigation arising from large transactions, and is also an experienced advisor of captive insurers. Recent engagements span matters connected to PFAS, asbestos, and several sexual abuse matters, including the representation of Allianz in coverage litigation related to sexual abuse cases brought against the Roman Catholic Bishop of Orange County.
Lawyer Rankings
- Hall of Fame United States > Insurance > Advice to insurers
- Advice to insurers United States > Insurance
Top Tier Firm Rankings
- Healthcare > Health insurers
- Healthcare > Life sciences
- M&A/corporate and commercial > M&A: middle-market ($500m-999m)
- Media, technology and telecoms > Outsourcing
- Healthcare > Service providers
- Tax > US taxes: contentious
- Tax > US taxes: non-contentious
Firm Rankings
- Media, technology and telecoms > Cyber law (including data privacy and data protection)
- Labor and employment > Employee benefits, executive compensation and retirement plans: design
- Labor and employment > Employee benefits, executive compensation and retirement plans: transactional
- Energy > Energy regulation: electric power
- Tax > Financial products
- Labor and employment > Immigration
- Tax > International tax
- Dispute resolution > Product liability, mass tort and class action - defense: toxic tort
- Energy > Renewable/alternative power
- Intellectual property > Trademarks: non-contentious (including prosecution, portfolio management and licensing)
- Labor and employment > Workplace and employment counseling
- Insurance > Advice to insurers
- Dispute resolution > Appellate: courts of appeals / Appellate: supreme courts (states and federal)
- Labor and employment > ERISA litigation
- Dispute resolution > General commercial disputes
- Government > Government contracts
- Insurance > Insurance: non-contentious
- Labor and employment > Labor and employment disputes (including collective actions)
- Labor and employment > Labor-management relations
- Intellectual property > Patents: litigation (full coverage)
- Intellectual property > Patents: prosecution (including re-examination and post-grant proceedings)
- Real estate > Real estate finance
- Dispute resolution > Securities litigation: defense
- Finance > Capital markets: equity offerings
- Antitrust > Cartel
- Antitrust > Civil litigation/class actions: defense
- Energy > Energy transactions: electric power
- Energy > Energy transactions: oil and gas
- Finance > Fintech
- Antitrust > Merger control
- Finance > Restructuring (including bankruptcy): corporate
- Finance > Structured finance: derivatives and structured products
- Finance > Commercial lending
- Dispute resolution > International arbitration
- M&A/corporate and commercial > Private equity buyouts: large deals ($500m+)
- Investment fund formation and management > Private equity funds (including venture capital)
- Real estate > Real estate
- Dispute resolution > Corporate investigations and white-collar criminal defense