Department profile
Osler, Hoskin & Harcourt LLP

Litigation: General Commercial

Canada Guide 2026 : Ontario


Osler, Hoskin & Harcourt LLP

Rankings

About

Provided by Osler, Hoskin & Harcourt LLP

Osler's Ontario Litigation team works collaboratively with clients to find the best possible outcome for their business needs – whether that be a negotiated settlement or fighting for the issue in court, mediation, or arbitration. Osler regularly participates in hearings before a variety of provincial and federal tribunals, such as the Financial Services Tribunal, the Ontario Municipal Board, the Environmental Assessment Board and the Ontario Securities Commission, as well as representing clients in various forms of alternative dispute resolution.

Chambers Review

Provided by Chambers

Litigation: General Commercial - Ontario


What the Team is Known For
With an impressive litigation team in Toronto, Osler, Hoskin & Harcourt regularly defends clients against multi-jurisdictional class actions, as well as advising on commercial and securities litigation. The firm possesses additional expertise advising on fraud, professional negligence and tax-related litigation, and demonstrates notable proficiency handling disputes resulting from competition, securities and environmental investigations. The department has a strong profile in the financial services sector and benefits from the support of the firm's integrated national litigation platform, as well as the cross-border capabilities born from its extensive US network.

Work Highlights

Provided by Chambers

  • Osler, Hoskin & Harcourt advised Imperial Tobacco on a claims resolution process within a CCAA restructuring.

Strengths

Provided by Chambers

  • The lawyers are experts in their field and highly responsive.

    Litigation: General Commercial respondentCanada
  • The Osler team has an ability to pool together resources and talent from across areas where multiple complex issues are involved.

    Litigation: General Commercial respondentCanada
  • The firm has really great thought leaders with a strong supporting cast around them.

    Litigation: General Commercial respondentCanada
  • The team are seasoned, knowledgeable professionals.

    Litigation: General Commercial respondentCanada

Notable Practitioners

Provided by Chambers

  • Band 1Lawrence Ritchie
    Band 1Lawrence Ritchie

    Lawrence Ritchie

    Toronto-based Lawrence Ritchie is notable for the depth and breadth of his practice in the securities space. He has extensive experience representing clients in litigation stemming from OSC investigations, as well as other regulatory disputes and securities class action suits.

    • He knows this area well and is commercially aware.

      Litigation: General Commercial respondentCanada
    • He is always practical, responsive and has been a great resource for us.

      Litigation: General Commercial respondentCanada
    • He is very interested in the policy side of securities litigation and making this space better to work in for everyone.

      Litigation: General Commercial respondentCanada
    • Larry is a very knowledgeable and experienced lawyer and is a pleasure to work with.

      Litigation: General Commercial respondentCanada
  • Band 2Mark A Gelowitz
    Band 2Mark A Gelowitz

    Mark A Gelowitz

    Mark Gelowitz has experience handling a broad range of disputes, including those in the technology, insurance, real estate and PE sectors. Based in Osler, Hoskin & Harcourt's Toronto office, he is additionally instructed for his representation in class action proceedings.

    • He is very capable and client-focused.

      Litigation: General Commercial respondentCanada
  • Band 4Craig Lockwood
    Band 4Craig Lockwood

    Craig Lockwood

    Based in Toronto, Craig Lockwood represents clients in securities class actions and OSC investigations, acting for both corporate entities and individual executives. He also has an active product liability practice.

    • He is able to function across multiple verticals in complex issues.

      Litigation: General Commercial respondentCanada
    • We trust Craig with our most complex matters.

      Litigation: General Commercial respondentCanada
  • Band 5Alex Cobb
    Band 5Alex Cobb

    Alex Cobb

    Alex Cobb boasts a broad commercial litigation practice with a particular focus on securities disputes. He has deep experience in assisting clients with regulatory enforcement matters. He is regularly engaged by clients in the digital asset and cryptocurrency space.

    • He has a wonderful oral advocacy style.

      Litigation: General Commercial respondentCanada
  • Band 5Robert Carson
    Band 5Robert Carson

    Robert Carson

    Robert Carson has a fast-growing reputation for his securities litigation practice, which includes strengths in both M&A litigation and securities class action defence. He is based in Osler, Hoskin & Harcourt's Toronto office.

    • Rob is a great litigator but also provides excellent business advice.

      Litigation: General Commercial respondentCanada
    • He is strategic and tactical.

      Litigation: General Commercial respondentCanada
  • Band 5Sonia Bjorkquist
    Band 5Sonia Bjorkquist

    Sonia Bjorkquist

    National disputes department chair Sonia Bjorkquist is a well-respected practitioner with notable experience handling product liability class actions. She represents her clients from Osler, Hoskin & Harcourt's Toronto office.

    • She is really smart and makes sure we have the resources we need.

      Litigation: General Commercial respondentCanada
  • Band 6Lauren Tomasich
    Band 6Lauren Tomasich

    Lauren Tomasich

    Lauren Tomasich is based in Osler, Hoskin & Harcourt's Toronto office, where she handles commercial disputes, securities matters, white-collar defence and enforcement proceedings.

    • She comes up with creative solutions to solve our issues.

      Litigation: General Commercial respondentCanada
    • She brings a great deal of comfort to us as she sees issues from a variety of perspectives.

      Litigation: General Commercial respondentCanada
    • She is smart and incredibly effective.

      Litigation: General Commercial respondentCanada
  • Up and ComingAdam Hirsh
    Up and ComingAdam Hirsh

    Adam Hirsh

    Adam Hirsh specialises in representing Canadian and global corporate clients in commercial litigation. He is experienced in all types of commercial disputes, as well as boasting a robust class actions practice.

    • Adam has always been keen to understand our business so that he and his team can support us in all facets required.

      Litigation: General Commercial respondentCanada

Ranked Individuals at Osler, Hoskin & Harcourt LLP (8)

Ontario

Members

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