Ryan C. Tisch - Strategic Antitrust Counsel - McDermott Will & Emery


Ryan Tisch provides strategic antitrust counsel for boards of directors, chief executive officers and key business stakeholders as they maneuver government regulations around the world.

Ryan is known for securing approvals for significant mergers facing review in multiple jurisdictions, including some of the largest mergers in the communications, manufacturing, technology, and food and beverage industries. As the digital economy exposes traditional businesses to new competition, clients also turn to Ryan to advise on their evolving business platforms and go-to-market strategies.

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  • Obtained regulatory clearance for multiple acquisitions for clients including DuPont, Corteva, Chemours, CSX and Sonoco*
  • Obtained merger clearance for DuPont’s acquisition of Pannar Seed from the Competition Tribunal of South Africa*
  • Obtained merger clearance for a major US manufacturing company’s acquisition of a French manufacturer from the United Kingdom’s Competition and Markets Authority*

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  • Global Competition Review, GCR 100, 2024
  • Legal 500, Recommended Lawyer, 2024
  • Thomson Reuters, Stand-out Lawyer, 2023
  • The National Law Journal, Equality Trailblazer, 2019


  • American Bar Association, Antitrust Law Section, member
  • District of Columbia Bar, member


University of Chicago Law School, JD, with honors, 2001
Yale University, BA, 1998

District of Columbia