Partner, Davies Ward Phillips & Vineberg LLP


Mark Katz is a partner in the Competition & Foreign Investment Review, Investigations & White Collar Defence, Retail and China practices. He has advised domestic and international clients on a wide variety of competition law matters, such as mergers and acquisitions, criminal cartel investigations, joint ventures, abuse of dominance, distribution and pricing practices, misleading advertising and compliance and other legislation governing foreign investment in Canada.

Mark has appeared at every level of court in relation to competition matters, including the Supreme Court of Canada, and has acted as counsel on several leading cases before the Competition Tribunal, including the first abuse of dominance and merger cases heard by that body. He also provides advice with respect to the application of the Investment Canada Act.

Mark has authored a wide variety of articles and conference papers on competition law matters and contributed to a number of texts and treatises in the area, as well as authoring and presenting policy briefs for clients on a variety of domestic and international competition-related matters. Mark is most recently co-author of The Competition Law Guide for Trade Associations in Canada and a contributing author to Bullen & Leake & Jacob’s Canadian Precedents of Pleadings, Second Edition. Mark is also a member of the editorial board for Competition Law Insight and a regular contributor to the Kluwer Competition Blog.

Mark is very active in the American Bar Association and Canadian Bar Association, including serving currently as the co-chair of the international antitrust law committee of the ABA section of international law and the immediate past chair of the criminal matters committee of the CBA section of national competition law.

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Contact details


Areas of Practice

  • Education

    B.A. McGill University, 1984
    LLB, Osgoode Hall, 1987


    Immediate Past Chair, International Antitrust Law Committee, American Bar Association Section of International Law (2013/2014)
    Vice Chair, Trade, Sports and Professional Associations Committee, American Bar Association Section of Antitrust Law (2013/2014)
    Past Chair, Criminal Law Section, Canadian Bar Association, National Competition Law Section