Tristram J. Mallett

Partner at Osler, Hoskin & Harcourt LLP

Tris Mallett is a distinguished legal expert whose practice centers on corporate litigation, class action defence, and securities enforcement. With a robust background representing clients in high-stakes matters, Tris delivers comprehensive legal counsel on contested merger transactions, take-over bid litigation, shareholder dissent and appraisal litigation, shareholder derivative claims, and complex cases involving securities misrepresentation, fraud, and insider trading.

Clients rely on Tris for his seasoned guidance during regulatory and industry organization prosecutions, as well as in-depth internal investigations. As a leading class action defence lawyer, Tris has substantial experience defending against claims—often in the areas of securities, competition/anti-trust, and product liability. Many of these cases are multi-jurisdictional and cross-border, requiring effective coordination with legal teams across Canada, the United States, and Europe.

Tris has appeared before Alberta, Ontario, and BC trial courts, federal and appellate courts, and a diverse array of administrative and regulatory tribunals. His representation extends to arbitration and mediation settings, making him a versatile and highly sought-after counsel for complex disputes.

Call to Bar: 1989 (ON); 1997 (AB)
Phone: (403) 260-7041
Fax: (403) 260-7024
Email: [email protected]

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