Mark Gillen

Mark Gillen
Faculty of Law

BCom – Toronto (1981), MBA – York (1983), LLB – Osgoode (1985)

Area of expertise

Securities, trusts, business associations, tax and competition law


Mark Gillen was appointed to the Faculty of Law in 1987 as assistant professor, was promoted to associate professor in 1992 and to full professor in 2001. He teaches Securities Regulation, Business Associations, Trusts, Tax, Competition Law and Historical Foundations of the Common Law. His primary areas of research are securities law, trusts and corporate law.

He is the author of Securities Regulation in Canada, 4th ed. (Thomson Reuters, 2019); co-author (with Donovan Waters and Lionel Smith) of Waters' Law of Trusts in Canada, 5th ed. (Thomson Reuters, 2021); co-author (with Robert Yalden, Janis Sarra, Paul Paton, Carol Liao, Mohamed Kimji, Michael Deturbide, Mary Condon, Gary Campo, and Brad Bryan) of Business Organizations: Practice, Theory and Emerging Challenges, 2d ed. (Emond Montgomery, 2018); co-author (with Faye Woodman, Jeff Berryman, David Freedman, Philip Girard, Matthew Harrington, Darcy MacPherson, Kent McNeil, Mary Jane Mossman, Jim Phillips, and Donn Short) and co-editor (with Faye Woodman) of The Law of Trusts: A Contextual Approach, 4th ed. (Emond Montgomery, 2021); and author of Corporations and Partnerships: Canada (Kluwer, 1992, revised 2008, 2015, 2016, 2017, and 2018).

Mark Gillen was a visiting professor at Nagoya University, Japan in 2005 and has been a visiting professor at Chulalongkorn University, Bangkok, Thailand every year except one since 1999.