Osler’s disputes practice is one of the largest and most accomplished in Canada. Years of careful recruiting and rigorous training have allowed us to develop deep expertise in complex corporate and commercial litigation.
As experienced trial and appeal lawyers, our litigators appear as counsel in all levels of courts in Ontario, Alberta, Québec and most other Canadian provinces, as well as in the Federal Court and the Supreme Court of Canada. We also participate regularly in hearings before a variety of provincial and federal tribunals, including: the Financial Services Tribunal, the Ontario Municipal Board, the Environmental Assessment Board, the Ontario Securities Commission, and the Autorité des Marchés Financiers (AMF).
In addition to our trial expertise, we assist clients in identifying and mitigating risks that could lead to new legal exposures. We focus on developing a deep knowledge of each client’s business, which enables us to intervene effectively to avoid lengthy proceedings or to achieve cost-effective and innovative solutions through early prevention or alternative dispute resolution. Our discovery management specialists work strategically with our litigators and clients to deliver an array of customized, cost-effective and efficient discovery solutions. In short, Osler is home to a critical mass of top litigators in their respective fields with the track records and the loyal and growing client base to prove it.
Ask us about:
- Appeals
- Class Actions
- Competition/Antitrust Litigation
- Constitutional and Public Law
- Construction and Infrastructure Litigation
- Corporate Governance and Securities Litigation
- Cross-Border Litigation
- Defamation (Libel and Slander)
- Discovery Management
- Energy and Natural Resources Litigation
- Environmental Litigation
- Franchise Litigation
- Insolvency and Restructuring
- Intellectual Property Litigation
- International Commercial Arbitration and ADR
- Municipal Litigation
- Pensions and Benefits Litigation
- Product Liability
- Professional Negligence
- Tax Dispute Resolution
Key Contacts
Partner, Disputes, Toronto
Partner, Disputes, Vancouver
Partner, Disputes, Toronto
Partner, Disputes, Montréal
Latest Insights
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Blog December 5, 2025
Changes in leave entitlements: federal, Saskatchewan and British Columbia updates for 2025–2026
Various legislative amendments have been proposed to change, or have recently amended, statutory leave of absence entitlements.
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Osler Update September 16, 2025
Recent Ontario decision illustrates risk of undocumented equity interests
A recent court decision underscores the potential risks of negotiating and finalizing legal documentation after performance has already begun.
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Osler Update August 11, 2025
Supreme Court of Canada splits on test for assuming jurisdiction
The case has significant implications for the ability of Canadian courts to assume jurisdiction over foreign defendants.
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Osler Update July 14, 2025
Artificial advocacy: how Canadian courts and legislators are responding to generative AI
With Canadian courts responding to the use of AI in court filings in a number of ways, litigants must balance using AI with their duties to the court.
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Stay up to date with our latest insights
SubscribeAwards and Recognition
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Recognized in Litigation: General Commercial (Nationwide; Ontario; Alberta; Quebec).
—Chambers Canada: Canada’s Leading Lawyers for Business -
Recognized in Corporate Commercial Litigation (Toronto, Ontario; Montréal, Québec; Calgary, Alberta); Professional Liability (Toronto, Ontario).
—The Canadian Legal Lexpert Directory -
Recognized in Dispute Resolution (Alberta; Ontario; Québec).
—Legal 500 -
Recognized in Dispute Resolution (Ontario, Québec, Alberta); Osler lawyers recognized in Litigation and Dispute Resolution.
—Benchmark Litigation Canada
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Recognized as “Law Firm of the Year” in the area of Corporate and Commercial Litigation (Canada), 2022.
—Best Lawyers Canada
In the Media
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Osler News November 20, 2025
24 Osler lawyers recognized in Lexpert Special Edition: Litigation 2025
Osler is proud to announce that 24 of our lawyers are recognized in the Lexpert Special Edition: Litigation 2025. This prestigious publication...
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Media Mentions October 8, 2025
Business litigators say Ontario’s proposal to shorten litigation dispute timelines is problematic – Canadian Lawyer
Recently proposed amendments to the Rules of Civil Procedure have prompted concern from lawyers in Ontario. In an effort to improve the provincial...
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Media Mentions October 1, 2025
As fears for the economy grow, lawyers point to less lender patience for insolvent companies – Lexpert
With tariff uncertainty and fears for a weakening economy, creditors are becoming more aggressive in their pursuit of insolvency proceedings, says...
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Osler News September 3, 2025
Osler lawyers recognized in Lexpert Special Edition: Mining 2025
Osler is proud to announce that five of our lawyers have been recognized in the Lexpert Special Edition: Mining 2025.
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