Daniel Belleau

Daniel Belleau, avocat - associé, litiges et recours collectifs

Daniel Belleau


Daniel Belleau is a co-founder and a managing partner of the firm. With more than 25 years of experience in civil and commercial litigation, he is also very active in class action litigation. His peers consider him one of the best lawyers in Canada.

He has consistently been recognized in four main reference guides to the nation’s leading law firms and lawyers. In particular, he ranked as a Litigation Star in Benchmark Canada every year since its inaugural edition. Daniel has also been listed in The Best Lawyers in Canada since 2006 and was Lawyer of the year 2015 in Class Action Litigation for Montreal, Quebec. He is one of the few Quebec Lawyers who have been ranked as Most frequently recommended in Class Actions by the 2014, 2015 and 2016 Canadian Legal Lexpert® Directory and he is also ranked as one of the Leading US/Canada cross-border litigation lawyers in Class Actions in Canada. In 2019, Chambers and Partners Canada® also recognized him in the Dispute Resolution, Class Actions (Plaintiff) category.

Known for his vast expertise and ability to manage particularly complex cases, Daniel continually aims to improve the legal issues faced by his clients through his practical and strategic advice. He regularly appears before trial courts and appellate courts. He also successfully pleaded a competition law class action before the Supreme Court of Canada which resulted in a landmark ruling setting out the conditions for class action authorizations in Quebec and deciding important issues in competition law, consumer law and private international law. This decision was cited in the highly regarded Lexpert Top Ten Cases of 2013.

Daniel has served his profession as a member of the Quebec Bar advisory committee on class actions since 2007 and the Canadian Bar Association’s National Task Force on Class Actions since 2010. He is a highly sought after speaker, receiving frequent invitations to give conferences. He is also solicited by the media for his opinions on legal matters.

 Daniel Belleau Lawyer of the Year



  • Represented a large consumer association in a landmark ruling by the Supreme Court of Canada setting out the conditions for authorization to bring a class action in Quebec and recognizing, for the first time in civil law, consumers’ right to bring legal proceedings against the members of an international cartel.: Infineon Technologies AG v. Option consommateurs, 2013 SCC 59

  • Represented investors who were victims of a Ponzi scheme, in the first Canadian class action suit to include accounting firms and securities custodians as defendants, based on their extracontractual liability.: Ménard v. Matteo, 2011 QCCS 4287

  • Represented a consumer in an important ruling by the Quebec Court of Appeal on the conditions for allowing a class action in competition law.: Harmegnies v. Toyota Canada Inc., 2008 QCCA 380

  • Represented Canadian users of a pharmaceutical product in the first Quebec court case to explicitly acknowledge the possibility of bringing a class action on behalf of a pan-Canadian group.: Brito v. Pfizer Canada Inc., 2008 QCCS 2231

  • Represented a large mortgage broker in a litigation where the opponent claimed to have taken control and ownership of the company.: Myette (Estate of) v. 2 786 591 Canada inc./Franchises Multiprêts 2011 QCCS 2286

  • Participated in two of the biggest settlements in Canadian securities class action history (international settlements worth over $2 billion).: Association de protection des épargnants et investisseurs du Québec (APEIQ) v. Nortel Networks Corporation 500-06-000126-017 and Skarstedt v. Nortel Networks Corporation 500-06-000277-059

  • Represented shareholders forced out of a privately held telecommunications company.: Gestion Bon Conseil inc. v. Guèvremont, J.E. 2003-601 (S.C.)