E. Marcellus Williamson

Marc Williamson, partner in the Washington, D.C. office, is a member of the Litigation & Trial Department, the Antitrust & Competition Practice and the Communications Industry group. Mr. Williamson focuses on representing clients in complex, global antitrust matters.

Mr. Williamson represents US and international clients on all aspects of antitrust law, including merger review, price fixing investigations and class action litigation. He has obtained clearance of numerous mergers, acquisitions and joint ventures from the Federal Trade Commission, the Department of Justice, the European Commission and numerous other competition agencies around the world. He has extensive experience in leading multi-jurisdictional merger clearance processes.

Mr. Williamson has worked with a range of industries, including:

  • Telecommunications and Media
  • Healthcare and Life Sciences
  • Professional Services
  • Energy
  • Aerospace
  • Automotive
  • Consumer Goods and Services