Department profile
Lenczner Slaght

Litigation: Securities

Canada Guide 2027 : Ontario

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Lenczner Slaght

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About

Provided by Lenczner Slaght

Commercial litigation represents the heart of our practice. Our lawyers have a wealth of experience in pursuing complex, high-profile and often highly confidential cases across the spectrum of business-related legal matters.

Our reputation and record of success lead many clients to entrust their most significant litigation to us: we have acted for a broad array of corporate clients in "bet-the-company" cases. Lenczner Slaght litigators take on each new challenge with an exacting attention to detail while setting immediate goals within a larger strategic framework. Our well-honed courtroom skills have won the respect of judges and fellow counsel at all levels of the courts – including the Toronto Commercial List, where many of Canada's most complex commercial cases are heard.

A significant part of our work has cross-border and international elements. We have relationships with leading firms in every jurisdiction.

As a firm devoted exclusively to litigation, Lenczner Slaght taps into a deep reserve of relevant expertise across diverse practice areas and industries. Whether a dispute concerns a complex financial instrument, a failed construction project or a successful mining venture, our lawyers understand the nuances and leverage their specialized knowledge to clients' advantage.

Chambers Review

Provided by Chambers

Litigation: Securities - Ontario

Band 3

What the Team is Known For

Lenczner Slaght is universally recognised as a leader in the Ontario market. Based in Toronto, the firm demonstrates significant national reach and offers expertise across a wide range of industry sectors, including healthcare and pharmaceuticals, financial services, education, transportation and information technology, as well as acting for public sector bodies. Widely viewed as a top choice for 'bet the company' litigation, the team is regularly selected to handle corporate fraud cases, breach of contract and consumer claims, as well as securities and shareholder disputes. The group is further noted for its experience of professional liability, defamation, public inquiries, class actions and restructuring and insolvency.

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Work Highlights

Provided by Chambers

  • Lenczner Slaght represented WE Charity in a defamation suit against Canadaland related to a podcast made by a journalist and his media company.

Strengths

Provided by Chambers

  • The Lenczner Slaght team brings not only strong technical legal capability, but also a practical understanding of how disputes unfold strategically, commercially and procedurally in real-world settings.

    Litigation: Securities respondentCanada

  • Lenczner Slaght is highly responsive and strategic, balancing risk management with real‑world considerations to achieve efficient outcomes.

    Litigation: Securities respondentCanada

  • Lenczner Slaght are excellent litigators, well suited for complex litigation and well-versed in strategy to move files forward.

    Litigation: Securities respondentCanada

  • The firm is a group of top-drawer litigators who can manage large, complex matters. Lenczner Slaght is top-notch and has very deep skill.

    Litigation: Securities respondentCanada

  • Lenczner Slaght is a leader in litigation. Through the process it demonstrates its expertise, diligence and resourcefulness in moving forward.

    Litigation: Securities respondentCanada

Notable Practitioners

Provided by Chambers

  • Peter Griffin
    Peter Griffin

    Peter Griffin

    Peter Griffin KC commands a formidable reputation as a litigator and remains the counsel of choice for many high-profile corporates for their high-stakes commercial disputes. He is based in Lenczner Slaght's Toronto office, and his reputation extends across the country and beyond.

    • Peter Griffin commands a great deal of respect. He is very strategic and an obviously strong leader.

      Litigation: Securities respondentCanada

    • Peter Griffin is an exceptional litigator and a very seasoned senior counsel.

      Litigation: Securities respondentCanada

    • His courtroom presence is excellent and he has the respect of the bench.

      Litigation: Securities respondentCanada

    • Peter is an excellent lawyer and the foremost litigation counsel in Canada.

      Litigation: Securities respondentCanada

    • Peter is a titan of the bar and a complete superstar.

      Litigation: Securities respondentCanada
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  • Tom Curry
    Tom Curry

    Tom Curry

    Tom Curry is held in high regard by market commentators and clients alike for his skill in complex litigation files. His practice touches all manner of areas, from commercial disputes and class actions to administrative law and professional liability. He is based in Lenczner Slaght's Toronto office.

    • He is a partner that understands how to build a case and win.

      Litigation: Securities respondentCanada

    • He offers excellent service, judgement and responsiveness. It's a pleasure to work with him. He is very solution-focused.

      Litigation: Securities respondentCanada

    • Tom is one of the premier litigators in the country. He brings an exceptional combination of legal intellect and strategic judgement.

      Litigation: Securities respondentCanada

    • Tom is the single best litigator in Canada.

      Litigation: Securities respondentCanada

    • Tom is very knowledgeable, client-focused and strategic.

      Litigation: Securities respondentCanada
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  • William C McDowell
    William C McDowell

    William C McDowell

    Toronto-based William McDowell stands as one of Ontario's most highly respected practitioners for public and judicial inquiries, as well as various other investigations and public law disputes.

    • He thinks matters through carefully, has sound judgement and an acute ability to consider the nuances of every option.

      Litigation: Securities respondentCanada

    • William McDowell is the heavyweight champion of practical and insightful advice that goes beyond the limits of the litigation matter he is facing.

      Litigation: Securities respondentCanada
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  • Monique Jilesen
    Monique Jilesen

    Monique Jilesen

    Monique Jilesen has wide-ranging commercial litigation experience, covering issues such as construction and real estate disputes, employee fraud and energy tariffs. Based in Toronto, she is Lenczner Slaght's managing partner.

    • Monique combines strong legal sophistication with practical, business-minded advice and is consistently responsive throughout the process.

      Litigation: Securities respondentCanada

    • She has a real aptitude for client service and management.

      Litigation: Securities respondentCanada

    • I have a lot of respect for Monique.

      Litigation: Securities respondentCanada

    • She offers exceptional service and legal skills.

      Litigation: Securities respondentCanada

    • Monique is a very capable lawyer.

      Litigation: Securities respondentCanada
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  • Rebecca Jones
    Rebecca Jones

    Rebecca Jones

    Toronto-based Rebecca Jones has particular expertise in complex cases with a regulatory dimension, and her practice covers municipal disputes, public inquiries and professional liability, among other areas.

    • Rebecca is deeply knowledgeable and very business-oriented and pragmatic in her advice. She is an excellent adviser.

      Litigation: Securities respondentCanada

    • She offers exceptional client service and is always available and willing to jump in.

      Litigation: Securities respondentCanada

    • We deeply value Rebecca's advice, her approach to files and her ability to connect with clients.

      Litigation: Securities respondentCanada

    • Rebecca Jones is a very competent lawyer with a keen sense of practicality in crafting strategy.

      Litigation: Securities respondentCanada

    • She is exactly who you want to represent you in high-stakes litigation.

      Litigation: Securities respondentCanada
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  • Matthew B. Lerner
    Matthew B. Lerner

    Matthew B. Lerner

    Toronto-based Matthew Lerner has a strong track record in civil litigation, with a wealth of experience in real estate and construction disputes, insolvency claims and broader commercial matters.

    • Matthew Lerner is a strong litigator who handles complex matters with precision and translates them into clear, winning arguments.

      Litigation: Securities respondentCanada

    • Matthew is an outstanding professional with strong, relevant experience for our industry. He is thoughtful and creative.

      Litigation: Securities respondentCanada

    • Matt is really terrific.

      Litigation: Securities respondentCanada
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  • Brian Kolenda
    Brian Kolenda

    Brian Kolenda

    Toronto-based Brian Kolenda has a broad civil litigation practice, with experience in business disputes, civil fraud, professional negligence and defamation.

    • Brian offers deep subject matter expertise.

      Litigation: Securities respondentCanada

    • He is a very experienced and capable lawyer and great to deal with.

      Litigation: Securities respondentCanada

    • Brian has strong expertise in developing a strong legal position while understanding risks.

      Litigation: Securities respondentCanada
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  • Eli S. Lederman
    Eli S. Lederman

    Eli S. Lederman

    Toronto-based Eli Lederman has a broad commercial litigation practice and represents clients in securities law, class actions, commercial contracts, franchise disputes, and oppression and shareholder litigation, acting for both private and public corporations.

    • He's very knowledgeable, client-focused and strategic.

      Litigation: Securities respondentCanada

    • Eli is responsive, thoughtful and approaches files with a high level of care. He is collaborative with a strong capacity to understand and deal effectively with complex matters.

      Litigation: Securities respondentCanada

    • Eli Lederman is an excellent litigator and a top-tier legal adviser.

      Litigation: Securities respondentCanada
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  • Paul-Erik Veel
    Paul-Erik Veel

    Paul-Erik Veel

    Paul-Erik Veel has impressive experience representing clients at the Supreme Court of Canada. He acts for clients in the technology, professional services and financial sectors.

    • He is super diligent and committed.

      Litigation: Securities respondentCanada

    • Paul-Erik Veel is an incredible lawyer and advocate. He really thinks outside the box.

      Litigation: Securities respondentCanada

    • Paul-Erik has very strong understanding of complex business situations.

      Litigation: Securities respondentCanada

    • He is analytical, strategic and a highly effective orator.

      Litigation: Securities respondentCanada
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Ranked Individuals at Lenczner Slaght (11)

Ontario

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