Ashley Thomassen

Senior Associate

[email protected]
Ashley Thomassen is an associate in the Toronto office and a member of the Commercial Litigation Group.

Ashley maintains a broad civil litigation practice, including:

  • contractual and enforcement matters
  • securities law, including contested take-over bids, broker liability, and regulatory offences and investigations
  • shareholder disputes, including oppression and derivative claims
  • administrative law, including judicial reviews
  • fraud litigation
  • veterinary malpractice defence and professional complaints
  • professional discipline matters

Ashley has acted as counsel with matters before administrative tribunals (including the Ontario Securities Commission, Mutual Fund Dealers Association of Canada, and Financial and Consumer Affairs Authority of Saskatchewan), all levels of courts in Ontario, the Federal Court of Canada, and Federal Court of Appeal.


  • Judicial Review Proceedings – Counsel to the Leaders Debate Commission on an application before the Federal Court of Canada by Rebel Media and True North for media accreditation for the federal leaders’ debate.
  • Enforcement of Foreign Judgments – Counsel to satellite television providers in a claim to enforce a $25 million U.S. judgment and permanent injunction in Canada (Dish v. Shava).
  • Take-Over Bid Litigation – Acts for issuers in contested take-over bids before securities commissions and courts, including defending poison pills (Re CanniMed Therapeutics).
  • Securities Regulatory and Investigations – Acts for registrants in respect of internal investigations and prosecutions before securities commissions and self-regulatory organizations.

Beyond our Walls

Professional Involvement

  • Member, Toronto Lawyers Association
  • Member, The Advocates’ Society
  • Member, Canadian Bar Association
  • Member at Large, Ontario Bar Association, Young Lawyers Division (Central)
  • Member, BLG Toronto Associates Committee

Community Involvement

  • Pro Bono Ontario Hotline
  • BLG Reads to Kids Program

Bar Admission & Education

  • Ontario, 2017
  • JD, Osgoode Hall Law School, 2016
  • BA (Hons.), Carleton University, 2012