Loni da Costa


[email protected]

Loni focuses her litigation and dispute resolution practice on securities defence, oil and gas and intellectual property related disputes.

She assists and advises clients on:

  • securities-related and other regulatory investigations, complaints and litigation
  • oil and gas industry disputes
  • trademark infringement and opposition proceedings
  • class actions and appeals

Loni has appeared before all levels of Court in Alberta and the Federal Court, as well as a number of administrative bodies, including:

  • the Alberta Securities Commission (ASC)
  • the Investment Industry Regulatory Organization of Canada (IIROC)
  • the Trademark Opposition Board (TMOB)
  • the Municipal Government Board
  • the Alberta Energy Regulator (AER)
  • the Alberta Liquor, Gaming and Cannabis Commission (AGLC)

Loni provides legal services through a Law Corporation.


Beyond our Walls

Professional Involvement

  • Member, Calgary Bar Association
  • Member, Canadian Bar Association

Community Involvement

  • Children’s Legal & Educational Resource Centre (CLERC)
  • Ambassador and past Board member, Unlocking Potential Foundation

Awards & Recognitions

  • Recognized in the 2022 edition (and since 2020) of Benchmark Litigation Canada as a Future Star.
  • Recognized in the 2022 edition (and since 2020) of Benchmark Litigation Canada in the 40 & Under Hot List.
  • Recognized in the 2022 edition of The Best Lawyers in Canada (Corporate and Commercial Litigation)

Bar Admission & Education

  • Alberta, 2011
  • JD, University of Saskatchewan, 2010
  • BA, University of Alberta, 2006