Firm Profile

Lax O'Sullivan Lisus Gottlieb LLP

Firm Details

Lax O’Sullivan Lisus Gottlieb (LOLG) is Canada’s premier counsel firm. The firm’s lawyers handle the most complex commercial disputes and public law cases. They carry a robust trial, arbitration and appellate practice across the country and in the Supreme Court of Canada.

LOLG is regularly engaged as trial and appellate co-counsel by peer law firms, and as court officers in large and sensitive litigation mandates. The firm also acts as counsel in insolvency cases, class actions, securities litigation and administrative law matters, as well as infrastructure, franchise, employment and health law disputes.    

LOLG also has one of Canada’s leading restructuring & insolvency practices. The firm’s insolvency counsel are ranked among the top nationally and have material roles in Canada’s largest and most complex insolvency proceedings and restructurings.  

LOLG’s practitioners are leaders at the bar, holding positions on the Chief Justice of Ontario’s Advisory Committee on Professionalism and the Supreme Court Advocacy Institute, and fellowships in elite trial organizations. Its associates are of the highest caliber, recruited primarily from judicial clerkships at the Supreme Court of Canada, provincial Courts of Appeal and the Commercial List of the Superior Court of Justice. LOLG's partners are among the most consistently recommended counsel in Canada and represent clients in Canada, the United States, and from overseas.

For further information visit


Matthew Gottlieb
Managing Partner
416 644 5353

Firm Practice Areas

  • Administrative and Public Law
  • Alternative Dispute Resolution
  • Appellate Practice
  • Class Action Litigation
  • Commercial Leasing Law
  • Commercial Litigation
  • Construction Law
  • Corporate and Commercial Litigation
  • Defamation and Media Law
  • Director and Officer Liability Practice
  • Energy Regulatory Law
  • Franchise Law
  • Health Care Law
  • Insolvency and Financial Restructuring Law
  • International Arbitration
  • Legal Malpractice Law
  • Litigation
  • Medical Negligence
  • Product Liability Law
  • Professional Malpractice Law
  • Real Estate Law
  • Securities Law

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Office Locations





Toronto, ON

145 King Street West, Suite 2750

Toronto, ON M5H 1J8



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