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Matthew B. Lerner listen


Matt* has a reputation as an advocate of choice for those in need of representation in a shareholder dispute, real estate litigation or an insolvency matter. Whether you need his expertise in the courtroom or the boardroom, Matt means§ you get practical advice to address complex issues. With vast experience across a wide range of industries, Matt is a go-to partner for advice that suits your business . Matt prides himself on using a straight-talking and direct approach to his clients’ causes. He understands that some disputes require resolution, while others call for an aggressive approach through trial. .



Matthew B. Lerner

is a partner at Lenczner Slaght.

"[Matt Lerner] is an exceptional advocate. His legal expertise, combined with his business, strategic and practical advice, forthright communication style and absolute commitment to success, separates him from his competition." — Chambers Canada

Matthew’s litigation practice is focused on complex commercial litigation, including infrastructure and real estate disputes, and insolvency matters. He regularly acts for parties involved in shareholder or partnership disputes, commercial arbitration and in prosecuting or defending civil fraud claims.

Matthew has also acted on behalf of boards of directors and officers in the defence of large multi-jurisdiction class actions. He has been actively involved in a variety of insolvency proceedings, acting for the court-appointed officer or secured creditors.

Matthew also has significant expertise developed over many years in defending the interests of physicians involved in regulatory and malpractice matters.

Matthew has litigated at all levels of Court in Ontario and at many administrative tribunals. Matthew’s clients span a wide-range of industries; ranging from individual entrepreneurs to large real estate developers and public companies in the information and technology sector.

Since 2010, Matthew has been the Chair of the Lenczner Slaght Moot in Legal Ethics and Professionalism which is held annually for law students at Western Law.

Matt is also a member of the firm's Management Committee.

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  • The Advocates' Society

  • Ontario Bar Association

  • Toronto Lawyers Association

  • Canadian Bar Association

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  • Chambers Canada (2024)

    Litigation: General Commercial (Ontario)

  • Canadian Legal Lexpert® Directory (2018-2024)

    Litigation - Corporate Commercial, Medical Negligence, Professional Liability, Insolvency Litigation (2023)

  • Lexpert®/American Lawyer Guide to the Leading 500 Lawyers in Canada (2021-2024)

    Corporate Commercial Litigation

  • Lexpert Special Edition: Canada's Leading Litigation Lawyers (2020-2023)

  • Lexpert Special Edition: Canada's Leading Infrastructure Lawyers (2020-2024)

  • Lexpert Special Edition: Canada's Leading Health Sciences Lawyers (2021)

  • Lexpert Rising Stars (2020)

    Leading Lawyers Under 40

  • The Legal 500 Canada (2020-2024)

    Dispute Resolution (Leading Lawyer), Insolvency and Restructuring (Recommended Lawyer), Labour and Employment (Recommended Lawyer) (2018, 2020)

  • Best Lawyers in Canada (2018-2024)

    Construction Law, Corporate Commercial Litigation, Health Care Law, Medical Negligence, Real Estate Law

  • Benchmark Canada (2018-2024)

    Litigation Star – Arbitration, Bankruptcy, Commercial

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