Litigation: Overview

Osler’s Litigation Department is one of the largest and most accomplished dispute resolution teams in Canada. Years of careful recruiting and rigorous training has allowed us to develop deep expertise in complex commercial litigation as well as the litigation specialties that major corporations call on most often: class actions, corporate governance and securities, insolvency, product liability, pension and employment, intellectual property, major contractual disputes, competition, tax as well as noteworthy constitutional and public law matters.

While setting new standards of accomplishment in winning commercial litigation, we also assist clients in identifying and mitigating risks that could lead to new legal exposures. Our deep knowledge of each client’s business 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 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. Many also participate regularly 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. We have represented clients in numerous private arbitrations and mediations. 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 following 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


A survey by the Canadian Legal Lexpert Directory recognizes Osler’s Litigation Department as “most frequently recommended” for Class Actions, and “consistently recommended” for Corporate/Commercial Litigation and Securities Litigation, with several of our legal practitioners acknowledged as leading individuals in the field. A source in Chambers Global: The World’s Leading Business Lawyers notes that "[Osler] is a well-oiled machine and I wouldn't hesitate to recommend them for large country-wide litigation matters." In addition, numerous Osler lawyers appear in Benchmark Litigation Canada, Lexpert’s Guide to the Leading US/Canada Cross-Border Litigation Lawyers in Canada and Lexpert’s Special Edition on Canada’s Leading Litigation Lawyers.