As an intellectual property litigation boutique, Belmore Neidrauer LLP is particularly well placed to represent clients before trial and appellate courts, and the Supreme Court of Canada. The group displays particular expertise in pharmaceutical and biotechnology patent litigation. Marian Wolanski brings strength to pharmaceutical and biotechnology patents, and leads the team alongside Stephanie Anderson. Anderson exhibits skill in patent, validity and infringement issues, in addition to damages and profits analyses.

Dipchand LLP represents a range of domestic and international clients in IP litigation, particularly those in the tech sector. At the helm of the practice, Elizabeth Dipchand represents clients in the biotech, pharmaceuticals and wireless communications industries. May Cheng is geared to support on trademark, copyright and patent disputes, with in-depth knowledge of injunctions. Another key member of the team is Jennifer Ko, who is geared to support on industrial design disputes. In the last year, Louis-Pierre Gravelle, Christopher Tan and Belle Van joined the group from Blaney McMurtry LLP.

Toronto-based boutique Fineberg Ramamoorthy LLP specializes in advising global corporates in the life sciences sector on a diverse spectrum of IP litigation matters, including PM(NOC) proceedings, patent impeachment, infringement and damages actions and judicial reviews.

Led by Jason Markwell, Dino Clarizio and Rebecca Crane, the IP litigation team at Markwell Clarizio LLP stands out for its work in patent and trademark proceedings. The group possesses in-depth knowledge of the pharmaceutical, biotechnology, and medical device industries.

The IP litigation team at Tyr LLP has developed a wide practice, including technology, regulatory and licensing disputes. As a litigation boutique, the group has significant trial experience. Practice head Melanie Baird is a key contact for clients in the life sciences and tech sectors, with expertise in patents and trademark disputes. Amy Grenon excels in multi-jurisdictional IP litigation, with a broad practice including trade secrets and copyright litigation. Promoted to partner in October 2024, Cole Meagher has extensive experience in the pharmaceuticals industry.

Preeminent in intellectual property disputes, Goodmans LLP has a longstanding reputation for its expertise in the pharmaceutical, high technology and telecoms sectors. Leadership of the group is shared between counsel Harry Radomski and partner Andrew Brodkin, who both focus on patent, trademark and copyright disputes and have appeared before the Supreme Court of Canada and Federal Court of Canada. Another key member of the team is Jordan Scopa, who supports clients at all stages of litigation including pre-litigation strategy, discovery, trial and appeal. Ben Hackett (patent validity and infringement) and Jenene Roberts (patent litigation) are also of note. At an associate level,  Jaclyn Tilak is a key figure.

Preeminent in IP litigation in Canada, Gowling WLG offers key services such as trademark, patent and copyright infringement and validity proceedings. Head of the national intellectual property team Shelagh Carnegie in Toronto assists clients on all aspects of the trademark prosecution lifecycle. Will Boyer spearheads the IP litigation group from Ottawa, with particular expertise in patent litigation cases and judicial review applications. The team also benefits in Ottawa from Christopher C. Van Barr, who has a proven track record in patent, trademark and trade secret matters, and Michael Crichton (patents, trade secrets and copyright litigation) and Nelson Godfrey in Vancouver (trademarks) are also of note. Shane Hardy and Brigeeta Richdale (both Vancouver) joined from Cozen O’Connor in April 2025.

Fasken is well known in the market for IP litigation, with notable strength in patent, trademark, copyright and trade secret cases. At the helm of the practice, David Turgeon is a name to note for clients in the life sciences, biomedical devices and manufacturing sectors. Julie Desrosiers focuses her practice on patent litigation, with experience in a number of patent infringement cases in the pharmaceutical sector. Jean-Philippe Mikus is well-versed in trademark oppositions, cancellations and appeals, whilst Michael Shortt has represented clients before the Supreme Court of Canada, the Federal Court and Federal Court of Appeal. All named lawyers work from the Montreal office.

With significant trial experience, the IP litigation team at Lenczner Slaght is regularly sought out by clients in the pharmaceuticals, biotech and communications sectors for representation in patent, trademark and copyright matters. Sana Halwani and Jordana Sanft jointly lead the practice, with Halwani appearing at all levels of Ontario and Federal courts and Sanft comfortably handling patent impeachment and infringement actions. Andrew Moeser has in-depth knowledge of the pharmaceutical and biologics, information technology, and oil and gas industries, and Martin Brandsma was promoted to partner in January 2025. All individual work in Toronto.

Patent infringement cases are a key focus of the intellectual property litigation team at McCarthy Tétrault, representing and advising clients across the pharmaceutical, telecommunications and oil and gas industries. Steven Mason and David Tait direct the team from Toronto; Mason has a proven track record litigating at all levels of the Canadian courts whilst Tait stands out for his work in pharmaceutical patent litigation. Daniel Glover is a reference in the market for copyright, trademarks, trade secrets and industrial design matters, and Sanjaya Mendis excels in patent disputes. James Holtom is another key member of the team, with extensive injunction, trial and appellate experience. All individuals mentioned work in Toronto.

Torys is home to a particularly impressive IP litigation team, that has vast trial, appellate and judicial review litigation experience. The practice spans an array of industries, including industrials, mining and telecoms in addition to biotech and pharmaceuticals. Spearheading the group, Andrew Shaughnessy frequently assists in patent and trademark infringement cases. Andrew Bernstein is active in matters involving the life sciences, information technology and media industries, whilst Yael Bienenstock has broad experience extending to patent litigation and data protection. Nicole Mantini has notable specialism in the pharmaceutical and biotechnology sectors. All lawyers mentioned work in Toronto.

The intellectual property group at Aird & Berlis LLP places a strong emphasis on litigation and prosecution. Kimberly McManus leads the team along with Timothy Lowman, who has extensive experience in intellectual property disputes such as trade secrets, copyright, patent and trademark litigation. Ken Clark has appeared before the Supreme Court of Canada and all levels of the Federal Court, and Ryan Evans is a key contact for clients in the petrochemical, consumer goods and manufacturing industries, having joined from Smart & Biggar in July 2024. Andrea Kroetch joined the practice from Stikeman Elliott LLP in September 2024. All individuals listed work in Toronto.

Blake, Cassels & Graydon LLP is geared to support on high stakes IP litigation, particularly for clients in the life sciences, tech and telecoms industries. Fiona Legere and Geoffrey Mowatt joined the firm in 2024 to lead the group, focusing on complex commercial IP litigation. Legere is an authority in patent litigation, and has extensive trial and appellate experience, whilst Mowatt excels in judicial reviews, copyright and trademark disputes. At an associate level, Richard Du and Diane Hwang are active in patent and trademark disputes. All individuals work in Toronto.

With a presence across the key cities in Canada, Norton Rose Fulbright stands out for its expertise of patent litigation in the life sciences sector. Jung-Kay Chiu co-leads the group from Toronto alongside Kristin Wall, who has a well-rounded experience of all areas including patents, trademarks, industrial designs and copyright. Vancouver-based Christopher Wilson focuses on trademark actions and appeals, patent infringement and ownership disputes, whilst Toronto-based Daniel Daniele is geared to support on patent impeachment and infringement, damages claims and copyright matters.