Competition/Antitrust & Foreign Investment

We help grow and defend your business

Competition law challenges continue to grow in Canada.  Canada’s Competition Bureau is increasingly using its investigative powers to more closely scrutinize mergers and the range of business practices attracting the Bureau’s attention is growing.  In this evolving environment, we have the proven expertise to help clients in every sector cut through the complexities of all aspects of competition law.

Canada’s Leading Competition Lawyers

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.   

Our outstanding reputation spans the full spectrum of competition law services --  from our expertise in transactional matters and investigations, to litigating high-stakes competition matters.  Drawing from this considerable experience, we provide our clients with a deep understanding of how the Competition Bureau operates.  

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.  And McCarthy’s track record of success in defending competition class actions, as well as class actions in general, is unsurpassed in Canada.  

Global Coordination

Competition and antitrust authorities around the world, including Canada’s Competition Bureau, are increasingly coordinating their enforcement activities.   Likewise, clients and counsel in the United States, Europe and other jurisdictions turn to us to handle their international transactions, investigations, litigations and compliance counselling that raise competition issues in multiple jurisdictions.  

With offices across Canada, as well as in the U.K. and New York City (where we practice Canadian law exclusively), we provide our clients with convenient access to the full suite of McCarthy Tétrault services.

Representative Work

Our team represents clients on the full range of competition issues, including:

  • M&A transactions (complex domestic and international transactions, including the largest and most complex domestic transaction in Canada); 
  • immunity and leniency applications in international and domestic cartels;
  • criminal investigations and proceedings across a wide range of industries;
  • civil proceedings before Competition Tribunal and all levels of court, for various matters including abuse of dominance and misleading advertising; 
  • civil damage claims (class actions); and 
  • compliance matters and programs.


For many years our group and its partners have been consistently ranked at the top of key Canadian and international directories, including Chambers Global, Lexpert, Global Competition Review and Euromoney.