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William T. McEnroe

Partner

William T. McEnroe represents US and international clients in a variety of high-stakes complex commercial matters with a focus on antitrust, commercial, and white collar litigation and investigations. Will frequently helps clients defend against allegations of price fixing, monopolization, unfair competition, False Claims Act violations, and commercial disputes. Will also counsels businesses on antitrust and litigation risks, advises on risk management strategies, and leads antitrust compliance and training seminars.

  • Defending a generic pharmaceutical manufacturer in multi-district litigation regarding alleged price fixing and market allocation
  • Representing a real estate brokerage franchisor in multiple antitrust lawsuits relating to trade association rules
  • Defending a pharmaceutical manufacturer against allegations of Anti-Kickback Statute, False Claims Act, and RICO violations
  • Represented a chemical manufacturer against allegations of price fixing in a four-week federal trial
  • Obtained dismissal on the pleadings of False Claims Act qui tam litigation for a large government contractor
  • Defended auto parts supplier against allegations of price fixing, market allocation, and bid rigging
  • Argued a pre-trial motion in limine on behalf of a dairy manufacturer in a federal antitrust case
  • Represented a pharmaceutical manufacturer in a successful appeal before the Pennsylvania Supreme Court regarding alleged unfair competition for AWP pricing
  • Led document collection and witness interviews in multiple internal investigations concerning various topics including the use of “no hire” and “no poach” agreements and alleged false claims
  • Assessed antitrust litigation risks in connection with corporate transactions
  • Obtained dismissal of predatory pricing counterclaims in connection with an intellectual property dispute
  • Represented a prisoner in a three-day trial alleging constitutional violations against prison guards
  • Represented same-sex couples challenging the validity of Pennsylvania’s marriage laws
  • University of Pennsylvania Law School, 2010, J.D., magna cum laude, Order of the Coif
  • University of Pennsylvania, 2005, B.A., cum laude
  • Pennsylvania
  • US Court of Appeals for the First Circuit
  • US Court of Appeals for the Third Circuit
  • US District Court for the Eastern District of Pennsylvania
  • US District Court for the Middle District of Pennsylvania
  • Clerkship to Judge Mary A. McLaughlin of the US District Court for the Eastern District of Pennsylvania (2010 - 2011)

Listed, The Best Lawyers in America, One to Watch, Antitrust Law, Philadelphia (2021–2025)

Listed, The Best Lawyers in America, One to Watch, Criminal Defense: White Collar, Philadelphia (2021–2025)

Member, Practice Group of the Year, Competition, Law360 (2018–2021)

Rising Star, Pennsylvania Super Lawyers (2019)

Former Editorial Board Member, University of Pennsylvania Law Review