Department profile
Blake, Cassels & Graydon LLP

Litigation: General Commercial

Canada Guide 2026 : Québec


Blake, Cassels & Graydon LLP

Rankings

About

Provided by Blake, Cassels & Graydon LLP

Blakes has one of the largest and most successful Litigation & Dispute Resolution practices in Canada, with top-tier litigators in the major business centres across the country, including Montréal, and an extraordinary depth of local industry knowledge, practice expertise and litigation experience. 

Our multidisciplinary team is armed with the skills and insights required to achieve favourable results for our clients. With all of the advice and expertise needed under one roof, we leverage best practices across industries and take swift action to resolve disputes smoother, smarter and with greater success.

We represent client interests at every stage of a dispute, from fact-finding and risk evaluation through final resolution and enforcement. We litigate in trial and appellate courts, resolve disputes at the negotiating table, and represent clients before tribunals and government agencies.

Blakes litigators have appeared before all levels of court in Canada, including the Supreme Court of Canada, and have been involved in precedent-setting cases involving hostile take-overs, indemnification of directors and officers, proxy contests and directors’ duties. Our expertise is complemented by one of Canada’s largest and most experienced corporate and commercial law groups.

In large, document-intensive cases, we integrate skilled paralegal support, leading-edge document management technology and a project management and e-discovery team to manage matters efficiently and cost effectively.

Chambers Review

Provided by Chambers

Litigation: General Commercial - Québec

Band 2

Band 2


What the Team is Known For
Blake, Cassels & Graydon has a robust Montréal team with a strong focus on corporate litigation, class action defence and product liability litigation. The group advises on a range of securities and contractual disputes as well as competition and consumer protection matters. The law firm is also noted for its experience of commercial arbitration. The team regularly acts for major players in industries such as banking, technology, energy, life sciences and construction. Its recent work includes representing major Québec-based entities before the Supreme Court.
À propos de l’équipe

Blake, Cassels & Graydon dispose d'une solide équipe à Montréal spécialisée en litiges d'entreprise, en défense en actions collectives et en litiges en responsabilité du fait des produits. Le groupe conseille sur une gamme de litiges en matière de valeurs mobilières et de contrats, ainsi que sur des questions de concurrence et de protection des consommateurs. Le cabinet est également reconnu pour son expérience en arbitrage commercial. L'équipe représente régulièrement des acteurs majeurs de secteurs tels que les banques, les technologies, l'énergie, les sciences de la vie et la construction. Le cabinet a récemment représenté d'importantes entités québécoises devant la Cour suprême.

Work Highlights

Provided by Chambers

  • Blakes acted for Field Aviation, an aircraft modification company, against a claim for damages brought by Bombardier.

  • Blakes a agi pour Field Aviation, une entreprise de modification d’avions, contre une réclamations de dommages déposée par Bombardier.

Strengths

Provided by Chambers

  • Blake, Cassels & Graydon is very business-minded and also has deep knowledge of commercial and corporate law.

    Litigation: General Commercial respondentCanada
  • The Blakes team is very thorough, diligent and has a good understanding of legal situations and options.

    Litigation: General Commercial respondentCanada
  • The lawyers at Blakes provide accessible and actionable advice and they exercise good judgement in identifying questions and issues.

    Litigation: General Commercial respondentCanada
  • Blake, Cassels & Graydon est un cabinet très axé sur les affaires et possède également une connaissance approfondie du droit commercial et des sociétés.

    Litigation: General Commercial respondentCanada
  • L’équipe de Blakes est très minutieuse, diligente et comprend bien les situations et les options juridiques.

    Litigation: General Commercial respondentCanada
  • Les avocats de Blakes fournissent des conseils accessibles et réalisables et font preuve de bon jugement pour identifier les questions et les problèmes.

    Litigation: General Commercial respondentCanada

Notable Practitioners

Provided by Chambers

  • Band 4Claude Marseille
    Band 4Claude Marseille

    Claude Marseille

    Montréal-based Claude Marseille is a sound choice among clients from a vast array of sectors, with particular expertise in the pharmaceutical industry for advice on disputes.

    Basé à Montréal, Claude Marseille est un choix judicieux parmi une clientèle provenant d’un large éventail de secteurs, avec une expertise particulière dans l’industrie pharmaceutique pour le conseil en matière de litiges.

    • Claude Marseille is extremely strategic in building defense, very well rounded and really understands the complexity of our business.

      Litigation: General Commercial respondentCanada
    • Claude Marseille is very sophisticated and experienced.

      Litigation: General Commercial respondentCanada
    • Claude is a meritorious lawyer. He manages his team well, is hands-on and very strategic.

      Litigation: General Commercial respondentCanada
    • Claude est un avocat méritant. Il gère bien son équipe, il est pratique et très stratégique.

      Litigation: General Commercial respondentCanada
    • Claude Marseille est extrêmement stratégique dans l'élaboration de sa défense, très complet et il comprend vraiment la complexité de notre entreprise.

      Litigation: General Commercial respondentCanada
    • Claude Marseille est très sophistiqué et chevronné.

      Litigation: General Commercial respondentCanada
  • Band 5Ariane Bisaillon
    Band 5Ariane Bisaillon

    Ariane Bisaillon

    Ariane Bisaillon has significant expertise acting in class actions and commercial disputes on behalf of clients hailing from the pharmaceutical and financial services sectors.

    Ariane Bisaillon possède une expertise importante en matière d’actions de groupe et de litiges commerciaux pour de clients des secteurs pharmaceutique et des services financiers.

    • Ariane is a rising star!

      Litigation: General Commercial respondentCanada
    • Ariane Bisaillon is a very good litigator.

      Litigation: General Commercial respondentCanada
    • Ariane Bisaillon est une très bonne avocate plaidante.

      Litigation: General Commercial respondentCanada
    • Ariane est prometteuse!

      Litigation: General Commercial respondentCanada
  • Band 5Caroline Biron
    Band 5Caroline Biron

    Caroline Biron

    Caroline Biron handles a range of civil litigation matters on behalf of international and domestic clients.

    Caroline Biron s’occupe d’un large éventail de dossiers de litige civil pour les clients internationaux et nationaux.

    • I am always sure of the quality she brings.

      Litigation: General Commercial respondentCanada
    • Caroline Biron is a very good as a lawyer and provides good customer service.

      Litigation: General Commercial respondentCanada
    • Je suis toujours sûr de la qualité qu’elle apporte.

      Litigation: General Commercial respondentCanada
    • Caroline Biron est une très bonne avocate et offre un bon service à la clientèle.

      Litigation: General Commercial respondentCanada
  • Band 5Simon Seida
    Band 5Simon Seida

    Simon Seida

    Montréal-based Simon Seida advises on commercial disputes as well as regulatory matters.

    Simon Seida, basé à Montréal, conseille sur les différends commerciaux, ainsi que sur les questions réglementaires.

    • Simon is extremely efficient and offers clear guidance.

      Litigation: General Commercial respondentCanada
    • Simon is very strategic, calm and is the voice of reason.

      Litigation: General Commercial respondentCanada
    • I really enjoy working with Simon. He has a very analytical and academic mind but is nonetheless exceedingly practical.

      Litigation: General Commercial respondentCanada
    • Simon est extrêmement efficace et offre des conseils clairs.

      Litigation: General Commercial respondentCanada
    • J’aime vraiment travailler avec Simon. Il a un esprit très analytique et académique, mais il est néanmoins extrêmement pragmatique.

      Litigation: General Commercial respondentCanada
    • Simon est très stratégique, calme et est la voix de la raison.

      Litigation: General Commercial respondentCanada
  • Associates to watchAnthony Cayer
    Associates to watchAnthony Cayer

    Anthony Cayer

    Anthony Cayer is a partner based in Montréal focused on commercial litigation and class actions for a range of clients including those in the manufacturing and pharmaceutical industries.

    Anthony Cayer est un associé basé à Montréal qui se concentre sur les litiges commerciaux et les actions de groupe pour une gamme de clients, y compris ceux des industries manufacturière et pharmaceutique.

    • Anthony Cayer has a great grasp of local law and is knowledgeable.

      Litigation: General Commercial respondentCanada
    • Anthony is extremely knowledgeable, responsive and provides invaluable support to our organisation.

      Litigation: General Commercial respondentCanada
    • Anthony est extrêmement bien informé, réactif et apporte un soutien inestimable à notre organisation.

      Litigation: General Commercial respondentCanada
    • Anthony Cayer a une grande compréhension du droit local et est bien informé.

      Litigation: General Commercial respondentCanada

Ranked Individuals at Blake, Cassels & Graydon LLP (5)

Québec

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