Overview
Insights
Awards

Duncan served the firm as deputy general counsel, and as special counsel in the litigation practice. In addition to his work for the firm and its attorneys, he represented many clients in Delaware corporate law litigation, securities litigation, antitrust matters, and appellate cases.

His securities experience included defending against securities lawsuits in which stockholder plaintiffs alleged that the companies’ disclosures were misleading or incomplete. He also represented multiple clients in SEC investigations involving accounting issues, disclosure issues, and the supervision of registered representatives.

His Chancery Court experience included cases involving a wide range of corporate law issues, including challenges to transactions, disputes over board of directors elections, the validity of stock options, stock value appraisals, stockholder demands for inspection of records, interpretation of proxies, and many other issues.

His antitrust experience included a number of price-fixing and monopolization cases. He advised clients in antitrust litigation involving such diverse industries as television picture tubes, firearms, cemeteries, and highway signage.

  • Super Lawyers®: Pennsylvania (2006-2023)
  • Best Lawyers in America®: Commercial Litigation (2011-2025), Litigation – Securities (2011-2025)
  • Named by Best Lawyers as the Philadelphia “Lawyer of the Year” for Litigation – Securities (2015, 2018)
  • Listed as a local litigation star in Pennsylvania in Benchmark Litigation

Duncan served the firm as deputy general counsel, and as special counsel in the litigation practice. In addition to his work for the firm and its attorneys, he represented many clients in Delaware corporate law litigation, securities litigation, antitrust matters, and appellate cases.

His securities experience included defending against securities lawsuits in which stockholder plaintiffs alleged that the companies’ disclosures were misleading or incomplete. He also represented multiple clients in SEC investigations involving accounting issues, disclosure issues, and the supervision of registered representatives.

His Chancery Court experience included cases involving a wide range of corporate law issues, including challenges to transactions, disputes over board of directors elections, the validity of stock options, stock value appraisals, stockholder demands for inspection of records, interpretation of proxies, and many other issues.

His antitrust experience included a number of price-fixing and monopolization cases. He advised clients in antitrust litigation involving such diverse industries as television picture tubes, firearms, cemeteries, and highway signage.

  • Super Lawyers®: Pennsylvania (2006-2023)
  • Best Lawyers in America®: Commercial Litigation (2011-2025), Litigation – Securities (2011-2025)
  • Named by Best Lawyers as the Philadelphia “Lawyer of the Year” for Litigation – Securities (2015, 2018)
  • Listed as a local litigation star in Pennsylvania in Benchmark Litigation

Education

  • University of Pennsylvania Carey Law School, J.D., 1975, editor-in-chief, Law Review
  • Princeton University, A.B., 1972

Clerkships

  • Hon. Arlin M. Adams, U.S. Court of Appeals, Third Circuit, 1975-1976