Margaret R. O

Margaret R. O'Sullivan

Listed in Best Lawyers since 2006

O'Sullivan Estate Lawyers
TD Bank Tower
Toronto-Dominion Centre
66 Wellington Street West, Suite 3430, PO Box 68
Toronto, Ontario  M5K 1E7  
Tel: (416) 363-3700 
Fax: (416) 363-9570

Law Practice: Margaret O'Sullivan's practice involves all aspects of private client work, including estate planning; will and trust planning; incapacity planning; estate litigation; advising executors, trustees and beneficiaries and administration of estates and trusts. Margaret is recognized in The 2015 Canadian Legal LEXPERT Directory as a leading practitioner in estate planning, in The Who's Who Legal: Private Client 2015, in The Best Lawyers in Canada 2016, and in The Who's Who Legal: Canada 2015 as one of the most highly regarded private client practitioners. She is a top-ranked Private Client lawyer in Chambers Canada Guide 2016. Margaret is the recipient of the 2014 STEP Founder's Award for Outstanding Achievement and the Ontario Bar Association's 2013 Award of Excellence in Trusts and Estates Law. Prior to establishing an independent practice, Margaret was a partner in the Toronto office of the national Canadian law firm Stikeman Elliott where she directed its trusts and estates practice. She has practiced exclusively in the area of trusts and estates since 1983.

Professional Activities: Margaret is a founding member and former Deputy Chair of the Society of Trust and Estate Practitioners (Canada) and former Chair of the Editorial Board of its newsletter STEP INSIDE. She is a past Deputy Chair and member of the Board of Directors and Council for STEP Worldwide and a past Chair of the Professional Standards Committee. She is a past Chair of the Trusts and Estates Section of the Ontario Bar Association and a past elected member of the Ontario Bar Association Council (1993-1998). She is a current member of the Canadian Bar Association, the American Bar Association, the New York State Bar Association, the International Bar Association, The International Academy of Estate and Trust Law, and the Canadian Tax Foundation. She was elected a Fellow of the American College of Trust and Estate Counsel in 1995. Margaret is also a current member of the Queen's University Gift Planning Advisory Committee. 

Publications: Margaret has been a frequent guest speaker, writer and conference chairperson for various professional organizations on the subject of trusts and estates, including for the Society of Trust and Estate Practitioners, the Canadian Bar Association, The Law Society of Upper Canada, The International Bar Association, the Canadian Tax Foundation and various private conference sponsors. She has also written extensively in the area of trusts, estate planning, estate administration and estate litigation. She is past editor and contributor to the Ontario Bar Association - Trusts and Estates Section Newsletter. Margaret authored two textbooks and developed the courses Engineering of a Trust and Trust and Estate Management for the Trust Institute of the Institute of Canadian Bankers. She is a co-author, Canada Chapter, International Succession Laws (Tottel 2009), and a contributing author to Widdifield on Executors and Trustees (Carswell 2002), The Private Wealth & Private Client Review (Law Business Research 2015), The International Comparative Legal Guide to: Private Client 2016 (Global Legal Group 2015), Private Client Multi-jurisdictional Guide 2015/16 (Practical Law Company) and Lexis Practice Advisor Canada (LexisNexis).

Education: Margaret graduated from Queen's University, B.A. 1978 (magna cum laude) and LL.B. 1981. In 1983, she was called to the Ontario Bar.

Queen's UniversityBA 1978Queen's UniversityLL.B 1981
Society of Trust and Estate Practitioners (STEP) WorldwideSociety of Trust and Estate Practitioners (STEP) CanadaCanadian Bar AssociationAmerican College of Trust and Estate CounselAmerican Bar AssociationNew York State Bar AssociationInternational Bar AssociationCanadian Tax FoundationThe International Academy of Estate and Trust LawQueen's Gift Planning Advisory Committee

Office Location

TD Bank Tower
Toronto-Dominion Centre
66 Wellington Street West, Suite 3430
P.O. Box 68
Toronto, ON M5K 1E7

Practice Areas

Trusts and Estates

Other Information

Gender: Female