Department profile
McCarthy Tétrault LLP

Competition/Antitrust: Litigators

Canada Guide 2026 : Nationwide - Canada


McCarthy Tétrault LLP

Rankings

About

Provided by McCarthy Tétrault LLP

We are widely recognized as some of the best competition lawyers in Canada. With our unique ability to integrate exceptional expertise in both of Canada’s legal systems (civil and common law) and both of Canada’s official languages (English and French) to address any client issue, our group is entrusted to advise on some of Canada’s most significant and industry-changing competition matters.  

From our expertise in transactional matters and investigations, to litigating high-stakes competition matters, our outstanding reputation extends to the full spectrum of competition law services.

Clients turn to us to for our extensive experience in clearing complex mergers and, when necessary, our ability to litigate to get their deal through. Our clients also benefit from our robust in-house e-discovery services which means that responses to Competition Bureau information requests in merger review (or other types of competition investigations) are managed in a highly efficient and cost-effective manner.

We have acted as counsel on landmark competition cases and have been retained by the Commissioner of Competition in Tribunal proceedings. We have advised on almost all of the national and international cartel cases in Canada over the past 20 years. As well, we have a track record of success in defending competition class actions, as well as class actions in general, that is unsurpassed in Canada.

Chambers Review

Provided by Chambers

Competition/Antitrust: Litigators - Nationwide - Canada


What the Team is Known For

McCarthy Tétrault operates a dynamic and well-established competition law practice group with considerable experience in investigations, transactions and disputes, as well as foreign investment mandates. The group has an impressive track record of handling prominent, blue-chip, cross-border merger clearance filings. On the contentious side, team members offer notable experience defending clients accused of abuse of dominance or misleading advertising in class actions. The firm has a broad presence with offices in both Toronto and Montréal.

Work Highlights

Provided by Chambers

  • McCarthy Tétrault acted as Canadian competition counsel for Hewlett Packard Enterprises in relation to the all-cash acquisition of Juniper, for an equity value of USD14 billion.

Strengths

Provided by Chambers

  • The firm has a deep bench of highly qualified individuals who are easy to work with and generate great confidence with clients.

    Competition/Antitrust: Litigators respondentCanada
  • McCarthy's team is incredibly skilled in strategy and knows how to get tough deals done.

    Competition/Antitrust: Litigators respondentCanada
  • The team strikes the perfect mix of high-quality technical advice that is also practical and tailored for a client's risk tolerance.

    Competition/Antitrust: Litigators respondentCanada
  • McCarthy Tétrault is plugged in globally.

    Competition/Antitrust: Litigators respondentCanada

Notable Practitioners

Provided by Chambers

  • Senior StatespeopleOliver J Borgers
    Senior StatespeopleOliver J Borgers

    Oliver J Borgers

    Oliver Borgers has cultivated a solid reputation in the Canadian competition market, with significant experience assisting clients with obtaining competition law clearance for transactions.

  • Band 1Jason Gudofsky
    Band 1Jason Gudofsky

    Jason Gudofsky

    Jason Gudofsky is highly regarded for his impressive experience advising clients on the merger clearance aspects of high-value, multi-jurisdictional corporate transactions. He also offers expertise in matters concerning foreign direct investment.

    • He is a go-to lead for significant and complex matters.

      Competition/Antitrust: Litigators respondentCanada
    • Jason is very familiar with the Canadian regulatory landscape and processes, including relevant regulators and political departments.

      Competition/Antitrust: Litigators respondentCanada
    • He is very experienced and highly responsive.

      Competition/Antitrust: Litigators respondentCanada
  • Band 2Deborah Salzberger
    Band 2Deborah Salzberger

    Deborah Salzberger

    Deborah Salzberger advises clients on the competition and foreign direct investment aspects of high-value corporate transactions. She is also highly capable of assisting clients on misleading advertising and/or pricing and distribution matters.

    • Debbie has taken the time to understand our business and tailor her advice to meet our needs and expectations.

      Competition/Antitrust: Litigators respondentCanada
    • Deborah is always practical in her advice.

      Competition/Antitrust: Litigators respondentCanada
    • She is very responsive and engaged.

      Competition/Antitrust: Litigators respondentCanada
  • Band 2Nikiforos Iatrou
    Band 2Nikiforos Iatrou

    Nikiforos Iatrou

    Nikiforos Iatrou frequently represents high-profile e-commerce clients in competition law class actions, with a notable focus on allegations of price fixing or misleading advertising.

    • He is able to understand our issues and provides both legal and strategic advice in a comprehensive and succinct manner.

      Competition/Antitrust: Litigators respondentCanada
    • He is pragmatic.

      Competition/Antitrust: Litigators respondentCanada
    • Nikiforos is highly strategic.

      Competition/Antitrust: Litigators respondentCanada
  • Band 3Casey W Halladay
    Band 3Casey W Halladay

    Casey W Halladay

    Casey Halladay represents clients before the Competition Bureau in the review of high-value acquisitions, as well as in investigations into possible abuses of dominance and price-fixing.

    • He is highly knowledgeable about many areas of the law and is well-connected to the community.

      Competition/Antitrust: Litigators respondentCanada
    • Casey is responsive, thorough and exceeds client expectations regarding the advice he is able to provide on Canadian competition law matters.

      Competition/Antitrust: Litigators respondentCanada
    • He is the complete package.

      Competition/Antitrust: Litigators respondentCanada
  • Band 4Dominic Thérien
    Band 4Dominic Thérien

    Dominic Thérien

    Montréal-based Dominic Thérien is a respected competition law expert with expertise in merger reviews, misleading advertising and bid rigging investigations.

    • He is able to take very technical legal substance and apply it to the current context.

      Competition/Antitrust: Litigators respondentCanada
    • He has an impressive ability to anticipate potential regulatory challenges and proactively craft solutions that align with both legal requirements and commercial goals.

      Competition/Antitrust: Litigators respondentCanada
  • Band 5Michael Caldecott
    Band 5Michael Caldecott

    Michael Caldecott

    Michael Caldecott assists clients with obtaining Competition Bureau approval for sale and purchase agreements and other high-value transactional matters.

    • I knew that I was in a safe pair of hands with him.

      Competition/Antitrust: Litigators respondentCanada
    • He knows how to deal with Canadian authorities.

      Competition/Antitrust: Litigators respondentCanada
  • Up and ComingGideon Kwinter
    Up and ComingGideon Kwinter

    Gideon Kwinter

    Based in Toronto, Gideon Kwinter is a partner in the firm's competition, antitrust and foreign investment group. He regularly advises clients on mergers & acquisitions, advertising and regulatory compliance.

    • Gideon provides impeccable client service.

      Competition/Antitrust: Litigators respondentCanada

Ranked Individuals at McCarthy Tétrault LLP (9)

Nationwide - Canada

Members

Provided by McCarthy Tétrault LLP

McCarthy Tétrault LLP has rankings in the following guides

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