McCarthy Tétrault LLP

Donald B Houston

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Practice Areas

Competition law and litigation practice includes defending criminal prosecutions, Competition Tribunal proceedings and private actions, including class actions. Has frequently represented the Commissioner of Competition. Counsels clients on mergers and other business practices. Significant cartel and merger practice, both domestic and international. Significant experience litigating Competition Tribunal cases.


Ontario Bar, 1981.

Professional Memberships

Former Chair of CBA National Competition Law Section; ABA; IBA.


“Competition Law,” in Intellectual Property Disputes (Thomson/Carswell); Jurisdictional Issues in International Cartel Cases: A Canadian Perspective, in ‘Litigating Conspiracy’ (Irwin Law, 2006).