As Canada’s leading litigation firm, we are proud to maintain our Tier 1 ranking in Dispute Resolution in Legal 500 Canada.
Based on extensive research, client feedback, and interviews with leading lawyers, Lenczner Slaght is also featured for its expertise in Construction, Insurance, Insurance: Dispute Resolution, Intellectual Property, IP Litigation, Life Sciences, and Restructuring and Insolvency.
Dispute Resolution
Hall of Fame
Leading Partners
Next Generation Partner
Recommended Lawyer
Legal 500 had this to say about our expert litigators:
Lenczner Slaght is a reference in the market for dispute
resolution matters in Ontario, representing public and private
companies, governments and regulators. Monique
Jilesen leads the team, focusing on class
actions, injunctions and insolvency matters, with
practice co-head, Eli Lederman, handling franchise disputes,
commercial contracts and securities litigation. Standout members of the
team include Peter Griffin KC, who has represented clients
in numerous trials, arbitrations and appeals,
and Tom
Curry is rated for his work on business disputes, judicial
reviews and professional liability matters. Matthew
Lerner (real estate disputes and partnership disputes) and Brian
Kolenda (professional negligence and defamation) are other
names to note.
Construction
Leading Partner
Next Generation Partner
Recommended Lawyer
Toronto dispute resolution boutique Lenczner Slaght houses a
growing contentious construction practice. The group acts for an
impressive roster of construction companies, developers, project
owners and insurers on the full range of judicial and arbitral
proceedings, with a strong record in claims related to large-scale
transport projects. Andrew Parley, who is also a qualified
engineer, anchors a team that includes high-profile trial lawyer Matthew
Sammon and newly promoted partner (January 2025), Aaron
Grossman.
Insurance & Insurance: Dispute Resolution
Leading Partner
- Nina Bombier – Insurance, Insurance: Dispute Resolution
Next Generation Partner
- Aoife Quinn – Insurance: Dispute Resolution
Recommended Lawyer
- Mark Veneziano – Insurance, Insurance: Dispute Resolution
Lenczner Slaght centres its Toronto-based insurance practice
on representing clients in policy, coverage and defence mandates.
The firm’s bench has strong expertise in insurance matters
and before all levels of courts. The team has litigated cases among
and against insurers involving a wide array of issues, such as
trigger of coverage, covered and excluded claims, obligations,
allocation of defence and indemnity. The firm is noted for its work
in the reinsurance space, class actions, director’s and
officer’s liability, environmental property damage claims and
professional negligence claims. Practice head Nina
Bombier is an insurance expert who handles complex insurance
cases involving coverage issues, product liability claims and environmental
contamination cases. Mark Veneziano is experienced in insurance and
commercial litigation, while Aoife
Quinn is a civil litigation specialist.
Intellectual Property & Intellectual Property Litigation
Leading Lawyers
- Sana Halwani – Intellectual Property, IP Litigation
- Jordana Sanft – Intellectual Property, IP Litigation
Recommended Lawyers
- Martin Brandsma – IP Litigation
- Andrew Moeser – Intellectual Property, IP Litigation
Forming a key pillar of the firm’s dominant dispute
resolution offering, Lenczner Slaght’s IP group is
distinguished by its formidable track record in patent, trademark
and copyright proceedings before all court levels. Acting for a
diverse roster of life sciences, media and entertainment,
technology and other IP-rich companies, the team routinely
represents domestic and international clients in sophisticated
multi-jurisdictional litigation. High-profile litigators Sana
Halwani and Jordana Sanft co-chair the practice… 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.
Life Sciences
Recommended Lawyers
Lenczner Slaght is a specialized litigation firm that utilizes
its experience in IP litigation to advise on life sciences
disputes. The team is adept at handling patent trials, representing
clients in proceedings before the Federal Courts, the courts of
Ontario and the Supreme Court of Canada. The team also handles
cross-border IP litigation involving the US, advising American
companies on Canadian laws and regulations. The firm advises
domestic and international clients from pharmaceuticals,
biotechnology, IT, software, internet and manufacturing sectors. Sana
Halwani leads the team and is an expert in cross-border IP
disputes, while co-head Jordana Sanft focuses on patent impeachment and
infringement actions under the Patented Medicine (Notice of
Compliance) Regulations.
Recommended Lawyers
Lenczner Slaght are litigation specialists who are well-versed
in handling commercial reorganizations for small, medium and large
businesses. The firm has experience representing clients in all
levels of courts up to the Supreme Court level and acts for
creditors, debtors and court-appointed officers. Monique
Jilesen co-leads the team and is a leading litigator who has
vast experience counselling creditors and receivers in multi-party
restructuring and insolvency proceedings. Co-head of the team, Matthew
Lerner is an expert in commercial litigation and is adept at
handling shareholder or partnership disputes alongside insolvency
proceedings.