Thornton Grout Finnigan LLP

9 Best Lawyers awards

Thornton Grout Finnigan LLP logo

Awarded Practice Areas

Corporate and Commercial Litigation

Biography

Deborah is recognized as a leading advocate with a broad commercial and civil litigation practice. She regularly acts for individuals, companies and financial institutions providing creative advice and strategies for litigating and resolving complicated business disputes. Her significant mandates include cases involving complex commercial agreements, director and officer liability, banking litigation, commercial real estate disputes, fraud claims, shareholder and partnership disputes, insolvency proceedings and securities-related matters. She is a skilled trial and appellate lawyer, appearing regularly in the Ontario Superior Court of Justice and in the negotiation, mediation and private arbitration of commercial disputes.


Deborah is a past President of The Advocates’ Society (2021-2022), the pre-eminent association of litigation counsel in Canada dedicated to the promotion of excellence in advocacy, access to justice and a strong, independent and courageous bar. She is a frequent speaker, moderator and skills trainer at professional development programs for advocates.


Deborah is consistently recognized as one of Canada’s leading litigators by major legal publications that include The Canadian Legal Lexpert Directory (Litigation – Corporate Commercial), Best Lawyers in Canada (Corporate Commercial Litigation) and Benchmark Canada. She has been identified as one of the top 100 Women in Litigation in Canada by Benchmark Canada.

Thornton Grout Finnigan LLP

9 Best Lawyers awards

Thornton Grout Finnigan LLP logo

Overview

  • New York, 1997
  • Ontario, 1996

  • The Advocates' Society - Past President
  • New York, 1997
  • Ontario, 1996
  • The Advocates' Society - Past President

Client Testimonials

Awards & Focus

Recognized in The Best Lawyers in Canada 2026 for work in:
  • Corporate and Commercial Litigation

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