Mary I.A. Buttery, KC

Partner at Osler, Hoskin & Harcourt LLP

Mary is a partner in the Disputes Group at Osler. She is an experienced commercial litigator specializing in complex, multi-party commercial litigation and class actions, along with noted expertise in restructuring and insolvency, the enforcement of foreign judgments, and fraud. In addition, Mary represents financial institutions, debtors and creditors, receivers and trustees in matters related to debt restructuring, corporate reorganizations, loan workouts, fraudulent preference actions, bankruptcy, and receiverships. She regularly advises clients who are experiencing financial difficulty, or whose customers’ or suppliers’ insolvency affects their business.

She has appeared in all levels of courts across Canada and has been lead counsel in the Supreme Court of Canada. Mary served as counsel in class action matters involving opioids, automobile wire harnesses, and lithium-ion battery price-fixing. She is recognized nationwide for her involvement in countless prominent litigation matters and many significant insolvency files.

Mary has extensive experience in numerous sectors, most notably, cannabis, mining, retail, real estate, forestry, and natural resources.

Year Call to Bar: 1993 (ON); 1997 (BC)

Phone: (604) 692-2752

Fax: (778) 785-2745

Email: [email protected]

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