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Mathieu Leblanc-Gagnon Associé/Partner Québec

Mathieu Leblanc-Gagnon

Partner Fasken
Jurisdiction Québec, 2004
Language(s) French, English
Office(s) Québec City


Mathieu Leblanc-Gagnon is a seasoned litigator who specializes in civil and commercial litigation. He represents a diverse business clientele in class actions and other contentious proceedings before various judicial and administrative tribunals.

His areas of expertise cover commercial litigation, product liability, insurance law and construction law.

He also devotes a significant portion of his practice to advising food processors on their procurement activities under the Act respecting the marketing of agricultural, food and fish products. In addition, he represents these processors before the Régie des marchés agricoles et alimentaires du Québec.

Mathieu’s skills are in demand for the preparation of legal opinions and the drafting of commercial contracts in various industries, including agri-food and forestry. He also advises various companies on private international law issues related to their interprovincial and international activities.


  • Recognized in Corporate and Commercial Litigation, The Best Lawyers in Canada 2024
  • Recognized in the Canadian Legal Lexpert Directory in Litigation - Corporate Commercial, Lexpert 2021 to 2023
  • Recipient of the first prize awarded by the Association Québécoise de droit compare (2003 edition), Université Laval 2003

Career & Education


  • LLB Université Laval

Memberships & Affiliations

  • Chair, Young Lawyers’ Forum, Canadian Bar Association (2014-2015)
  • Member of Jeune Barreau de Québec (2014-2015)
  • Member of Executive Committee of the Québec Division of the Canadian Bar Association (2004-2009 and 2011-2015)
  • Member, Board of the Canadian Bar Association’s Québec branch (from 2003 to 2015)
  • Chairman of Jeune Barreau de Québec (2010-2011)


Fasken Institute



Speaking Engagements

Intensive Training – Construction Law Québec Bar - Intensive Training Day location location Quebec


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