Most recommended class action law firms in Ontario

Lexpert looks at Ontario’s leading class actions law firms based on the results of our extensive annual peer review. The full lineup of the province’s top class action lawyers and law firms is available in our practice area rankings list.

A class action is a legal proceeding where the plaintiff brings forward a lawsuit for the benefit of a larger group of affected individuals. In our peer survey, we included actions pertaining to personal injuries, including those involving defective medical products and procedures, defective products (automobiles, building products, etc.) and commercial loss (securities).

Full-service class action law firms

Bennett Jones LLP

Year established: 1989 (Toronto)

Number of lawyers: 20+
Number of ranked lawyers: 5
Partners: Ranjan K. Agarwal, Jonathan G. Bell, Preet K. Bell, Emrys Davis, Michael A. Eizenga, Gavin H. Finlayson, Alan P. Gardner, Ilan Ishai, Jeffrey S. Leon, Amanda C. McLachlan, Ashley L. Paterson, John F. Rook, Julia E. Schatz, Nathan J. Shaheen, Michael C. Smith, Robert W. Staley, Cheryl M. Woodin

Bennett Jones LLP is one of Canada’s leading full-service business law firms. It boasts a pool of more than 400 lawyers and business advisors in its offices in Toronto, Ottawa, Calgary, Edmonton, Vancouver, New York in the US and Beijing in China. Bennett Jones specializes in complex cross-border and international transactions and litigation. The firm’s class action litigation team assists companies resolve potentially high-stakes class action disputes. It has an extensive product liability and product regulation practice, consisting of specialists with substantial understanding of the financial, regulatory, reputational, and other business impacts and uncertainties associated with complex disputes.

Read more about Bennett Jones LLP on IP protection on agribusiness and cannabis sectors

Blake, Cassels & Graydon LLP

Year established: 1856

Number of lawyers: 20+ (Toronto)
Number of ranked lawyers: 8
Partners: Melanie Baird, Catherine Beagan Flood, Bradley E. Berg, Jeff W. Galway, Anne Glover, Rahat Godil, Nicole Henderson, Ben A. Jetten, Robert E. Kwinter, Andrea Laing, Jill M. Lawrie, Robin Linley, Gordon McKee, Doug McLeod, Ryan Morris, J.A. Prestage, Holly Reid, Andrew Skodyn

Blake, Cassels & Graydon LLP (Blakes) is one of Canada’s top full-service law firms, providing legal advice to leading businesses both domestically and overseas. It handles transactions of all sizes and levels of complexity, whether an issue is local or multi-jurisdictional, or practice-area specific or interdisciplinary. The firm also has one of the most experienced class actions defence teams in the country. Spanning nearly four decades, Blakes has defended clients in more than 400 class actions, including precedent-setting cases with industry-wide implications and multijurisdictional cases requiring global coordination. It is among a small number of Canadian firms with notable class action success at trial and on dispositive applications and motions. The firm has offices in Toronto, Ottawa, Vancouver, Calgary and Montréal, and international headquarters in New York in the US, London in the UK and Beijing in China.

Read more on Blake, Cassels & Graydon LLP on cannabis sector litigation

Davies Ward Phillips & Vineberg LLP

Year established: 1961

Number of lawyers: 10 (Toronto)
Number of ranked lawyers: 5
Partners: Anthony M.C. Alexander, Andrea L. Burke, Chantelle Cseh, Sandra A. Forbes, Steven G. Frankel, Michael H. Lubetsky, Matthew Milne-Smith, Derek D. Ricci, Luis Sarabia, Kent E. Thomson

Davies Ward Phillips & Vineberg LLP (Davies) is a full-service business law firm that specializes in high-stakes and complex matters. Its clients include leading businesses and financial institutions in North America and abroad. The firm’s class action lawyers are internationally recognized for their technical expertise and practical ability to achieve their clients’ objectives. They have successfully represented industry giants LinkedIn and Morgan Stanley Canada in complex class actions. Davies is backed by a well-established record of success, including at trial and on appeal. The firm has offices in Toronto and Montréal, as well as New York in the US.

Read more about Davies Ward Phillips & Vineberg LLP on how technology is reshaping privacy

McCarthy Tétrault LLP

Year established: 1855

Number of lawyers: 20+ (Toronto)
Number of ranked lawyers: 8
Partners: Hovsep Afarian, Eric S. Block, Shane C. D’Souza, Casey Halladay, Donald B. Houston, Christopher Hubbard, Brandon Kain, Gillian P. Kerr, Frank McLaughlin, Dana M. Peebles, H. Michael Rosenberg, Byron Shaw, Junior Sirivar, Deborah Templer, Caroline Zayid

McCarthy Tétrault LLP is one of Canada’s leading full-service business law firms, offering expert legal services to clients across the country and around the world. It has offices in Canada’s major commercial centres, New York in the US and in London in the UK. These offices form an integrated team that can work together, harnessing the full power of Canada's largest litigation group with regional knowledge of the local business and legal environment. Its national class action group has also represented clients in some of the most high-profile class action cases in the country, including in the areas of financial services, insurance, product liability, competition law, securities, and pensions and benefits. McCarthy Tétrault has written the definitive book for class action defendants: Defending Class Actions in Canada, now in its fifth edition.

Read more about McCarthy Tétrault LLP on competition and foreign investment

Osler, Hoskin & Harcourt LLP

Year established: 1862

Number of lawyers: 20+ (Toronto)
Number of ranked lawyers: 6
Partners: Robert Carson, Alexander Cobb, Jennifer Dolman, Mark Gelowitz, Adam Hirsh, Geoffrey Hunnisett, Shawn Irving, Craig Lockwood, Larry Lowenstein, David Morritt, Kevin O’Brien, Lawrence E. Ritchie, Nancy Roberts, Karin Sachar, David Stamp, Lauren Tomasich

Osler, Hoskin & Harcourt LLP has offices in Toronto, Ottawa, Montréal, Calgary, Vancouver and New York. It boasts a stable of more than 400 lawyers providing expert legal services to Canadian, US and international clients. The firm’s class actions defence practice group has successfully defended clients in many of the leading and complex class action cases in Canada. The team specializes in developing multi-faceted national class action defence strategies and, when necessary, coordinating with US counsel to supplement and execute a cohesive, solution-focused North American defence strategy. It also has an excellent track record in opposing and defeating class certification and winning early dismissals in every major jurisdiction in Canada. The practice includes product liability, consumer protection, privacy, securities, environmental, false or misleading advertising, pensions and benefits, employment and franchise.

Read more about Osler, Hoskin & Harcourt LLP on financing tech growth

Stikeman Elliott LLP

Year established: 1952

Number of lawyers: 18 (Toronto)
Number of ranked lawyers: 6
Partners: David R. Byers, Alan L. W. D'Silva, Samaneh Hosseini, Peter F.C. Howard, Katherine L. Kay, Eliot N. Kolers, Aaron Kreaden, Daniel S. Murdoch, Patrick J. O'Kelly, Alexander D. Rose, Danielle K. Royal

Stikeman Elliott LLP specializes in business law with clients in Canada and across the globe. The firm’s national class actions group works closely with clients to help them understand and evaluate their options in the context of their business. The team helps develop an aggressive defence for current claims and a crisis management strategy that minimizes present exposure and risk of future claims. It also provides clients defending class actions commenced in multiple jurisdictions with a seamless, one-firm approach across Canada. On cross-border matters, the firm’s excellent working relationships with lawyers and experts in other jurisdictions enable it to deliver integrated legal solutions. The national class actions team holds offices in Montréal, Toronto, Ottawa, Calgary and Vancouver.

Read more about Stikeman Elliott LLP on private equity investment

Torys LLP

Year established: 1941

Number of lawyers: 40+ (Toronto)
Number of ranked lawyers: 8
Partners: Andrew Bernstein, Sheila R. Block, Gillian B. Dingle, John A. Fabello, Andrew Gray, Patricia D. S. Jackson, William McNamara, Jeremy Opolsky, David Outerbridge, Linda M. Plumpton, Sylvie Rodrigue, Andrew M. Shaughnessy, Arlen K. Sternberg, Lisa K. Talbot, John A. Terry, James C. Tory, W. Grant Worden

Torys LLP is an international business law firm with offices in Toronto, Montréal, Halifax, Calgary and New York. The firm’s litigation team includes a group of class actions specialists with expertise that extends from pre-certification to trial. These lawyers represent clients in a wide range of class actions cases brought in provinces across the country, including in Québec, and in courts of all levels. Torys’ extensive trial and appellate experience includes leading and coordinating the defence and settlement of multijurisdictional class actions nationally and internationally. The firm’s class actions team consists of lawyers called to multiple Bars with active practices in Québec and the rest of Canada. This means that the same team of lawyers can be counsel, not only on cases filed in Québec, but also on cases filed elsewhere in the country.

Read more about Torys LLP on cannabis sector regulation

Boutique class action law firms

Koskie Minsky LLP

Year established: 1981

Number of lawyers: 10
Number of ranked lawyers: 3
Partners: Kirk M. Baert, Celeste Poltak, Jonathan Ptak, David Rosenfeld, James Sayce, Mark Zigler

Toronto-based Koskie Minsky LLP is a boutique firm of skilled counsel advising clients in the areas of civil litigation, union side labour law, pensions and benefits, and class actions. Its clients include pension funds, trade unions, boards and commissions, insurers, corporations and non-profit groups. The firm also represents individuals seeking access to courts and tribunals. Koskie Minsky boasts a team of class action litigation specialists with extensive experience in handling complex cases in a wide variety of areas, including residential schools, crown liability, environmental claims, securities misrepresentation, employment law, product liability and consumer protection.

Lenczner Slaght Royce Smith Griffin LLP

Year established: 1992

Number of lawyers: 30+
Number of ranked lawyers: 5
Partners: Nina Bombier, Jonathan Chen, Tom Curry, Peter Griffin, Sana Halwani, Monique Jilesen, Rebecca Jones, Risa M. Kirshblum, Brian Kolenda, Eli S. Lederman, Matthew B. Lerner, Jaan Lilles, William C. McDowell, Brendan F. Morrison, Peter J. Osborne, Andrew Parley, Andrew Porter, Scott Rollwagen, Shara N. Roy, Ronald G. Slaght, Matthew Sammon, Glenn Smith, Lawrence E. Thacker, Dena N. Varah, Paul-Erik Veel, Mark Veneziano

Toronto-based Lenczner Slaght Royce Smith Griffin LLP is recognized as one of Canada’s leading litigation practice. For more than 25 years since its establishment, the firm has acted for clients in over 17,000 cases, conducting more than 500 trials, arbitrations and tribunal hearings. Its class actions expertise has been sharpened through hands-on experience in a wide range of complex and technically demanding proceedings. The firm's class action work spans international boundaries as a growing number of claims are launched in multiple jurisdictions. Lenczner Slaght advises clients based in the US, Europe, Asia and across Canada. Its class actions group focuses on cross-border litigation between Canada and the US.