Gillian B. Dingle

Toronto: 416.865.8229
Fax 416.865.7380


LLM (James Kent Scholar), 2012
Columbia University
LLB (With Distinction), 2004
University of Western Ontario
BA, (Honours), 2001
University of Waterloo

Bar Admissions

Ontario, 2005


Gillian is the practice group leader for Torys’ litigation department. Her practice focuses on civil litigation in the areas of corporate and securities law. She is also a co-head of the firm’s securities defence practice. Gillian acts for capital market participants in defending civil claims and regulatory investigations before the Investment Industry Regulatory Organization of Canada and the Ontario Securities Commission. She also advises on internal investigations into regulatory matters.

A significant portion of Gillian’s practice involves disclosure questions, securities class actions, and defending investment dealers and brokers in trading-related matters. As a complement to this work, she advises financial institutions on investigations involving consumer protection matters. She also maintains an active commercial litigation practice, representing corporations in contested transaction matters, and providing advice and representation in cases and private arbitrations involving breach of contract and business torts.

Gillian has appeared as counsel in all levels of court in Ontario, the Federal Court, the Federal Court of Appeal, and the Yukon Court of Appeal, and before the Ontario Securities Commission and other securities regulators.

Representative Work

Load More


Chambers Canada—Up and coming lawyer in litigation: securities (2021)

The Legal 500 Canada—Next generation lawyer in dispute resolution: Ontario (2021)

Benchmark Canada: The Definitive Guide to Canada’s Leading Litigation Firms and Attorneys—Future Star (Dispute resolution) (2020)

Best Lawyers in Canada—Leading lawyer in corporate and commercial law (2021)

The Canadian Legal Lexpert Directory—Leading lawyer in securities litigation (2020-2021)

Lexpert’s Rising Stars: Leading Lawyers Under 40—One of Canada’s leading lawyers under 40 (2016)



Professional Involvement

Before joining Torys, Gillian was senior in-house counsel at a Canadian financial institution. Prior to practicing in-house, Gillian spent over five years as a litigation associate at Torys and then left in 2011 to pursue her LLM at Columbia University.


Gillian sits on the Steering Committee of the OSC Litigation Assistance Program that provides free legal assistance to unrepresented respondents to OSC administrative proceedings. She is also a board member of Special Olympics Ontario, an organization that enriches the lives of Ontarians with an intellectual disability through sport. Gillian also volunteers with Golden Future, an organization that performs outreach work with high school students in Khyelitsha township, South Africa.