Lexpert Ranked Law Firm

Widely recognized as Canada’s leading litigation practice, Lenczner Slaght has successfully represented clients’ interests in some of the most complex, high-profile cases in Canadian legal history.

Our lawyers are distinguished by their depth of courtroom experience, appearing regularly at all levels of the courts, before administrative and regulatory tribunals, and in mediation and arbitration proceedings.

We are also known for our wealth of talent: Lenczner Slaght partners, ranked among the best of their peers nationally, lead a recruitment and mentoring program that attracts gifted litigators who are committed to upholding the highest professional standards.

From commercial disputes and class actions to cross-border matters and professional regulation, Lenczner Slaght brings expert strategy to all areas of litigation.


Experience: We spend more time in court.

Lenczner Slaght is exclusively a litigation firm. We are seasoned trial and appeal lawyers who have honed our skills over many years of challenging, high-profile cases. We have proved our ability to represent our clients where it counts — on our feet in all levels of the courts and before every kind of tribunal.

Talent: We offer unmatched depth.

Our litigation skills and courtroom expertise are unrivalled in Canada. We attract the best in our profession — bright, accomplished young lawyers who are mentored within our firm by top-ranked senior litigators.

Results: We achieve our clients’ goals.

We know what it takes to build and present solid, compelling cases. We have the skills and experience to position a case for success, enhance the prospect of a favourable resolution — and achieve positive results in a hearing or trial. We vigorously pursue our clients’ goals with creativity and determination, tackling the most complex challenges with a disciplined focus sharpened through years of hands-on experience.


Arbitration Defamation & Media Intellectual Property
Appeals Employment Product Liability
Class Actions Estates Litigation Professional Liability and Regulation
Commercial Litigation Insolvency and Restructuring Public & Administrative
Competition Insurance Securities Litigation


130 Adelaide St W, Suite 2600
Toronto, ON, Canada, M5H 3P5
Phone: (416) 865-9500
Fax: (416) 865-9010

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Mentioned in Lexpert Publications

  • Solicitor-client privilege and jurisdiction were prominent in last year’s top cases. While these rulings indicate a balanced approach, the most significant ones were pro-business.
  • The open-court principle requires accusers to identify themselves, but new issues in data privacy and health care are challenging the courts to consider broadening the use of anonymity in class ...
  • Landmark cases have recently broadened the courts’ ability to interpret contractual intent. Does this represent a more nuanced approach, or does it open the door to ambiguity in contract law?
  • The 2017 SCC ruling in Teal reinforces the scc’s broad deference toward arbitral decisions, even when tribunals are found to have erred on questions of fact.
  • Lawyers know there’s no such thing as perfect legal harmony, but recent decisions by Canadian courts and tribunals may come as a shock.
  • As a multicultural, bilingual nation with civil and common law jurisdictions, Canada should be a natural hub for International Arbitration. So why isn’t it? Recent provincial amendments aim to make ...
  • Litigation finance, as a concept at least, has been around. But a host of new players with creative leveraging strategies are now paving the way for what could become a force in the profession.
  • A look at an Ontario Superior Court decision in relation to Algoma’s bankruptcy proceedings, which addressed important issues concerning the role of a CCAA monitor, the scope of a derivative action, ...
  • Court refuses to enforce Ecuadorean judgment against Chevron Canada, finding it is separate entity
  • Some big firms are getting bigger to achieve economies of scale and expand their global reach. As competition heats up, boutiques and specialty firms are playing to new strengths
  • The Ontario Superior Court of Justice’s decision in Atos v. Sapient Canada, which awarded damages to the former for breach of contract.
  • Tips from the pros on how to manage litigation costs, before they get out of hand
  • Arbitration has evolved into the preferred method for efficient dispute resolution. There is risk, however, in bypassing the courtroom.
  • Several recent Canadian decisions clarify issues around admissibility of expert evidence, perceived conflict of interest and whether counsel can review draft reports prior to trial
  • CANADIAN PUBLISHERS, BROADCASTERS AND AUTHORS are at risk of being dragged to the far corners of the globe to defend libel suits, say critics of a recent Ontario Court of Appeal decision. ...
  • Optimism reigns in the life-sciences sector as biologics become a major driver of market growth
  • In a less than stellar year for business, only the decisions relating to privilege, certification and leave can be seen as decidedly positive in our Top Ten Cases of 2015 list. Canada’s courts ...
  • Canada’s top court has enunciated a new legal duty in contract negotiations. Its effects are wide-ranging and controversial
  • In Bhasin v. Hrynew, the SCC tried to make Canadian contract law more settled, fair and closely aligned with parties’ reasonable expectations. But does the decision clarify the law or muddy the ...
  • Canada is increasingly seen as the jurisdiction of choice for cross-border class actions
Lenczner Slaght Royce Smith Griffin LLP is a Lexpert-Ranked Firm in the following practice areas
Class Actions Toronto, Ontario Most Frequently Recommended
Litigation - Commercial Insurance Toronto, Ontario Most Frequently Recommended
Litigation - Corporate Commercial Toronto, Ontario Most Frequently Recommended
Litigation - Product Liability Toronto, Ontario Consistently Recommended
Litigation - Securities Toronto, Ontario Consistently Recommended
Medical Negligence Toronto, Ontario Most Frequently Recommended
Professional Liability Toronto, Ontario Most Frequently Recommended
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