Margaret O'Sullivan

Margaret O'Sullivan

Margaret’s practice involves all aspects of trust and estate work for domestic and international private clients, including estate planning; will and trust planning; incapacity planning; estate litigation; advising executors, trustees and beneficiaries and administration of estates and trusts, with a focus on high net worth domestic, cross border and multi-jurisdictional succession issues.

Margaret is recognized in The Best Lawyers in Canada 2018, Legal Week’s Private Client Global Elite 2018, in the 2018 Edition of The Canadian Legal Lexpert Directory as one of the most frequently recommended estate planning lawyers, in The Who’s Who Legal: Private Client 2018 and in The Who’s Who Legal: Canada 2018 as one of the five leading trust and estate lawyers in Canada. She is one of the six top-ranked private client lawyers in Chambers High Net Worth Guide 2018.

She 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 the firm’s trusts and estates practice. She has practiced exclusively in the area of trusts and estates since 1983.

Visit O’Sullivan Estate Lawyers website or contact Margaret at