Denes A. Rothschild



Denes practices competition, marketing, international trade and foreign investment law. He provides expertise and advice on:

  • proposed mergers
  • competition compliance
  • criminal cartel matters
  • foreign investment review
  • advertising and marketing law
  • international trade matters, including tariff classification, dumping and subsidy investigations

He also litigates class action claims against clients relating to alleged violations of the cartel and misleading advertising provisions of the Competition Act. Denes is also Co-Leader of the firms Public Policy and Government Relations Group.

Making use of his dual Canadian and American law degrees, Denes regularly collaborates with attorneys in other jurisdictions to ensure consistent and outstanding representation for his large multinational clients.

Denes recently spent a year seconded as corporate counsel to one of the world's largest information technology corporations.


  • Berkshire Hathaway Energy Company ("BHE"), in its indirect share purchase acquisition of the Montana Alberta Tie-Line from Enbridge Inc. for an approximate purchase price of $200M.
  • Imperial Metals Corporation in its sale of a 70% interest in the red mine in British Columbia to Newcrest Mining Limited for US$806.5 million and a follow-on joint venture between the parties for the ongoing operation of the Red Chris mine.
  • Loblaw and George Weston Limited in defence of numerous class actions relating to price fixing on fresh commercial bread.
  • Loblaw and George Weston in multi-year internal investigation and immunity application with respect to their participation in a cartel fixing the prices of fresh commercial bread.
  • CanniMed Therapeutics Inc. in its C$1.1 billion acquisition by Aurora Cannabis Inc.
  • COSCO Shipping Holdings Co. Ltd. and Orient Overseas International Ltd. in COSCO’s US$6.3 billion acquisition of OOIL.
  • A Canadian client with respect to the ongoing U.S. investigation into alleged subsidies on uncoated groundwood paper from Canada.
  • An international auto parts supplier in Canadian immunity and leniency applications related to cartel activity, as well as related class actions.
  • Loblaw Companies Limited in its C$12.4 billion acquisition of Shoppers Drug Mart Corporation, the largest retail merger in Canadian history.
  • An American client in defence of a threatened dumping investigation initiated by a Canadian competitor.
  • AmeriPride Services Inc. in its US$1 billion acquisition by Aramark.
  • Cabela's Incorporated in its US$5.5 billion acquisition by Bass Pro Shops.
  • Loblaw in a Competition Bureau investigation into its supplier practices and related court proceedings.
  • Hardline Curling Inc. in its battle to have a ban on its curling brooms imposed by the World Curling Federation and Curling Canada overturned.
  • Gerber in judicial review proceedings before the Federal Court and Federal Court of Appeal respecting Canadian Food Inspection Agency determination regarding imports of baby food.
  • Reliance Comfort Limited Partnership in an abuse of dominance claim before the Competition Tribunal.
  • Garant GP before CBSA and CITT relating to Aluminum Extrusions dumping investigation.
  • Canada Pension Plan Investment Board in its role as a member of the Maple Group in its acquisition of the TMX Group Inc.

Beyond Our Walls

Professional Involvement

  • Member, Law Society of Upper Canada
  • Member, American Bar Association
  • Member, Ontario Bar Association
  • Vice-chair, Food and Agriculture Committee, American Bar Association's Antitrust Law Section
  • Board Member, Public Affairs Associations of Canada (PAAC)
  • Board Member, Public Affairs Associations of Canada (PAAC)
  • Past chair, Young Lawyers Committee, Canadian Bar Association's Competition Law Section

Community Involvement

  • Volunteer, Law Help Ontario
  • Past volunteer, counsel, Institute of Parliamentary and Political Law
  • Board Member, Kef Toronto, an East-End Toronto Jewish community organization

Awards & Recognitions

  • Recognized in the 2021 edition of The Best Lawyers in Canada (Advertising and Marketing Law)
  • Recognized in the 2021 edition of Chambers Canada – Canada’s Leading Lawyers for Business (Competition/Antitrust - Nationwide)

Bar Admission & Education

  • Ontario, 2009
  • JD, Washington College of Law at American University, 2008
  • LLB, University of Ottawa, 2008
  • BA, University of Toronto, 2004