Our lawyers are distinguished by their wealth of litigation experience – gained through regular appearances in all levels of the courts, before administrative and regulatory tribunals, as well as mediation and arbitration. 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, we bring expert strategy – backed by rigorous research, data management and administrative support – to highly demanding cases in all litigation practice areas.

Chambers Global Chambers Global 
"Highly sought-after boutique with noted market standing across the gamut of commercial litigation matters and extensive experience before the Supreme Court of Canada."

    – Chambers Global 2016

For the 14th consecutive year, Lenczner Slaght has been ranked in the top tier for dispute resolution by Chambers Global, the highly respected UK publisher of legal directories and research. Chambers' rankings are compiled from intensive research among clients and law firms. Lenczner Slaght lawyers have been referred to as "seasoned," "deeply respected" and "much sought after."

The firm was also recognized for its expertise in class actions and intellectual property litigation. 

In addition to the firm rankings, the following Lenczner Slaght lawyers achieved individual rankings:

Dispute Resolution

Class Actions

Intellectual Property

Canadian Legal Lexpert® Directory
"[In] the crowded space of Toronto litigation firms, boutiques and large firms compete across the bull's eye. Lenczner Slaght Royce Smith Griffin LLP, a large litigation boutique in Toronto, stands alone at the head of the list."

     – Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada 2011

The 2016 Canadian Legal Lexpert® Directory recognizes the professional excellence of 23 lawyers at Lenczner Slaght, who have been ranked among Canada's best in the annual peer-based ratings conducted by Lexpert, a leading source of news and information about the Canadian legal profession.

The following Lenczner Slaght lawyers have been selected through peer surveys as leading practitioners: Ian Binnie, C.C., Q.C., Alan J. Lenczner, Ronald G. Slaght, Michael Royce, Glenn Smith, Peter Griffin, Tom Curry, William C. McDowell, Marguerite Ethier, Peter Osborne, Anne Posno, Lawrence Thacker, Risa Kirshblum, Mark VenezianoNina Bombier, Monique Jilesen, Eli Lederman, Matthew Sammon, Andrew SkodynRebecca Jones, Shara Roy, Dena Varah and Jaan Lilles.

Lenczner Slaght lawyers have been recognized for their expertise in Class Actions, Insolvency & Financial Restructuring, International Commercial Arbitration, Medical Negligence and Professional Liability, as well as in the following litigation practice areas: Commercial Insurance, Corporate Commercial, Defamation & Media, Directors' & Officers' Liability, Intellectual Property, Product Liability, Public Law and Securities.

Also in this directory, Lexpert has once again placed Lenczner Slaght at the centre of the Bull's Eye – its highest possible rating for a litigation practice.

Click here to view the Litigation Lawyers Who’s Who: Toronto Bull’s-eye

Click here to view the Commercial Litigation Lawyers Who’s Who: Toronto Bull’s-eye

Click here to view the Intellectual Property Lawyers Who’s Who: Toronto Bull’s-eye

Benchmark Canada

Benchmark Canada
"The litigation stable to beat…The number of cases they try at Lenczner Slaght eclipses that of any other firm in Toronto… They're the best, and you won't hear anyone in Canada say otherwise…When other firms slink off and shy away from a case that seems too hot to handle, Lenczner Slaght is famous for saying ‘hell yes, we'll take this to trial!' – and waiting for their opponents to blink first, which they usually always do."

     – Benchmark Canada: The Definitive Guide to Canada's Leading Litigation Firms and Attorneys

The Canadian edition of the respected publication Benchmark Litigation notes Lenczner Slaght is "a fortress inhabited by litigation royalty" and ranks several of the firm's lawyers among "Toronto's most called-upon litigators," including Alan J. Lenczner Q.C., Ronald G. Slaght Q.C., Peter GriffinTom Curry, Peter J. OsborneWilliam C. McDowell, Marguerite Ethier, Lawrence E. Thacker, Mark VenezianoAndrew Skodyn, Eli S. Lederman and Matthew Sammon.

Canadian Lawyer
"The proportion of top-quality litigators is incredible."

    – Canadian Lawyer, 2012

Lenczner Slaght was again recognized as one of Canada's Top 10 litigation boutiques in the latest annual review published by Canadian Lawyer magazine.

IAM Intellectual Asset Management Patent 1000

"a well-respected group including some of the best lawyers in Ontario."

    – IAM Patent 1000, 2015

IAM Patent 1000, the guide to leading private practice patent professionals and firms, is dedicated to recognizing best-in-class patent prosecution, licensing and litigation practitioners on a global basis. 

Lenczner Slaght was recognized for its expertise in intellectual property and for "…commercial contentious practice in the patent sphere."

In addition to the firm's ranking, Marguerite Ethier was acknowledged for being a "…life science whiz [and is an] incredibly strong advocate." while Andrew Skodyn "a man of many talents has demonstrated his flair for oral argument at the Supreme Court..."

Who's Who Legal

Who's Who Legal: Canada is an annual ranking of Canadian lawyers in 34 areas of business law, based on peer review surveys and interviews with general counsel and lawyers in private practice.

The following Lenczner Slaght lawyers have been selected through peer surveys as leading practitioners in the following areas of practice:

Commercial Litigation:

Life Sciences


Best Lawyers


Best Lawyers  is an annual guide to the international legal profession.

Since the annual peer ratings were inaugurated in Canada in 2006, Lenczner Slaght has been recognized for the excellence of its practitioners in a wide range of areas.

The 2017 Best Lawyers guide recognizes the following Lenczner Slaght lawyers: Ian Binnie C.C., Q.C.Alan J. Lenczner, Ronald G. Slaght, Michael E. Royce, Glenn Smith, Peter Griffin, Tom Curry, William C. McDowell, Marguerite Ethier, Peter J. Osborne, Anne E. Posno, Risa M. Kirshblum, Mark VenezianoAndrew SkodynNina BombierMonique Jilesen, Eli S. Lederman, Matthew Sammon, Rebecca Jones, Jaan Lilles, Dena N. VarahShara N. Roy, and Nadia Campion.

In addition to the rankings, Lenczner Slaght was named Law Firm of the Year for the practice area of Medical Negligence.