Expertise
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Practice Areas:
- Bar Admissions:
- Education:
- Osgoode Hall Law School (2018) JD (Honours)
- Western University (2015) (Honours - Political Science and Criminology)
Details
- Bio
- Cases
- Associations
- Blog Posts
- News & Media
- Publications & Presentations
- Recognition
Bonnie Greenaway (she/her)
is an associate at Lenczner Slaght.
Bonnie maintains a broad litigation practice. She has a special focus on complex commercial disputes, shareholder disputes, medical negligence, and urgent proceedings for injunctive relief. She is especially skilled in handling sensitive matters involving significant reputational risk and challenging interpersonal dynamics, providing strategic, pragmatic advice while remaining focused on protecting her clients’ interests and relationships.
Bonnie has extensive courtroom experience. She has appeared before all levels of court in Ontario and has an established track record of success. Bonnie also has extensive arbitration experience, representing clients in complex commercial disputes before arbitral tribunals.
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Abbasbayli v Fiera Foods Company et al
Trial counsel to the defendant companies and corporate directors in a wrongful dismissal action brought by a former employee. The employee’s action was dismissed. The defendants were successful at trial in establishing the employee had perpetrated wilful misconduct justifying termination for cause.
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Counsel to directors and shareholders in a private arbitration concerning a dispute involving allegations of oppression and breach of fiduciary duties.
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North American Polypropylene v Williams Canada Propylene
Appellate counsel to North American Polypropylene in a complex construction dispute involving the development of a polypropylene facility.
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1000425140 Ontario Inc v 1000176653 Ontario Inc
Appellate counsel concerning a claim for fraudulent misrepresentation and failure to disclose a latent defect in a luxury residential property.
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Phyxiat Courier v Liquor Control Board of Ontario and Trillium Supply Chain Inc
Counsel to a defendant concerning a dispute alleging negligence in supply chain management.
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Original Traders Energy Ltd (Re)
Counsel to Mareva Respondents in injunction and CCAA insolvency proceedings.
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Wintercorn v Global Learning Group Inc; Piett v Global Learning Group Inc
Counsel to a defendant law firm in class proceedings in Ontario and Saskatchewan relating to a tax donation program. Successful in having the Saskatchewan action dismissed as an abuse of process and the Ontario action dismissed against the law firm on a summary judgment motion.
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Counsel to the successful defendant physicians in a two-week jury trial in 2025 involving a medical negligence action arising from a patient’s death due to complications from a cystic duct stump leak following a laparoscopic cholecystectomy.
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Law Society of Ontario v Metrolinx and Haudenosaunee Development Institute v Metrolinx
Counsel to a successful defendant resisting an injunction to prevent site work. (Prior to joining Lenczner Slaght)
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Johnson v Lakeridge Health Corporation
Counsel to a successful physician at trial concerning the alleged delayed treatment of a stroke. (Prior to joining Lenczner Slaght)
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The Advocates’ Society
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Canadian Bar Association
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Ontario Bar Association - Member-at-Large, Health Law Executive (2026-2027)
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Osgoode Hall Law School - Faculty, Trial Advocacy
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Ensuring Objectivity in Expert Testimony
The blog, Ensuring Objectivity in Expert Testimony, co-authored by Meghan Bridges and Bonnie Greenaway was published on commerciallist.com. In this blog, they examine the requirements for admitting expert opinion evidence on the Toronto Commercial List, focusing on the duties of impartiality and objectivity under Rules 4.1 and 53.03 and the Toronto Commercial List Practice Direction.
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Shareholder Wars: A Receiver Is Not the Remedy
Bonnie Greenaway and Drew Black co-authored the blog Shareholder Wars: A Receiver Is Not the Remedy, published on commerciallist.com.
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Pleadings continue to be a popular battleground in the product liability context. Over the years, a body of law has developed respecting motions to strike for negligent design, negligent manufacture and failure to warn claims. Nevertheless, there continues to be debate as to the specificity needed for pleading these types of claims. That debate is fuelled in part by jurisprudence demonstrating a high tolerance for claims that are arguably vague and lacking in material facts. Even where a claim is struck, plaintiffs are routinely permitted to amend their pleading.
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49 Lenczner Slaght Litigators Named in Best Lawyers in Canada 2027
In the 2027 edition of Best Lawyers in Canada, 49 of our expert litigators earned 172 rankings across 26 practice areas, a testament to the depth and breadth of our advocacy.
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Lenczner Slaght Litigators Featured Among Best Lawyers in Canada
The 2026 edition of Best Lawyers in Canada recognizes Lenczner Slaght with 180+ rankings, featuring 48 of our expert litigators across 27 practice areas.
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Lenczner Slaght Litigators Recognized as the Best Lawyers in Canada
In the 2025 edition of Best Lawyers in Canada, Lenczner Slaght is proud to receive 168 total rankings, with 45 of our expert litigators recognized for their expertise across 25 practice areas.
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Lenczner Slaght Welcomes Nine New Associates
Canada’s leading litigation firm continues to add to its collective experience and knowledge with the addition of nine exceptional associates.
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Anatomy of a Medical Malpractice Case
Bonnie Greenaway was invited to present at OsgoodePD's certificate program, Anatomy of a Medical Malpractice Case, as part of the session Conducting the Discovery: Techniques and Tactics. Bonnie will share practical strategies for conducting effective examinations for discovery, including securing admissions, using hypotheticals, and testing a physician’s understanding of the applicable standard of care. She will also provide guidance on approaching examinations with tact and sensitivity.
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Clinical Risk, Negligence and Claims Management in Health Care
Risa Kirshblum and Bonnie Greenaway were invited to participate at OsgoodePD's Clinical Risk, Negligence and Claims Management in Health Care Certificate Program. Risa discussed defence best practices and mitigation strategies. Bonnie joined Module 5, which featured demonstrations of examinations in chief and cross-examination, designed to give participants practical insights into the litigation process and highlight the issues that come into play.
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Lenczner Slaght Advocacy Competition in Legal Ethics and Professionalism 2024
We were proud to continue our sponsorship of Western Law’s Annual Advocacy Competition in Legal Ethics and Professionalism. Madison Robins, Sean Lewis, Bonnie Greenaway, Sahar Talebi, and Kyle Magee participated as judges.
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Best Lawyers in Canada: Ones to Watch (2024-2027)
Ones to Watch – Corporate and Commercial Litigation & Health Care Law, Medical Negligence