Iris Antonios How to pronounce this name. Partner | Toronto

Recent representative matters include:

• Represented the intervener before the Alberta Court of Appeal in a case concerning the application of the Cape Town Convention on international interests in mobile equipment, particularly security interests in aircraft, within Canada (Avmax Aircraft Leasing Inc. v. Air X Charter Limited, 2022 ABCA 252)

• Counsel to a Canadian company in an ICC arbitration against an international counterparty regarding an aircraft work contract dispute

• Co-counsel to a Canadian investor in an arbitration under the UNCITRAL rules against the government of a host state, under a bilateral investment treaty

• Co-counsel to a Canadian company in an international commercial arbitration under the ICC Rules against a contractual counterparty, in connection with an investment project in a foreign state

• Advising a Canadian company on dispute resolution issues in connection with the divestiture of an investment abroad

• Co-counsel to a consumer products company in a domestic commercial arbitration relating to a warehousing services agreement

• Advising a Canadian-based investor in connection with potential investment claims under NAFTA and the CPTPP relating to investments in Mexico's energy sector

• Advising a Canadian investor on potential domestic implications of a foreign regulatory investigation into an investment abroad

• Advising the Canadian subsidiaries of European and American based multinational companies in respect of a potential investment claim against Canada

• Co-counsel to the Six Nations of the Grand River in an ongoing large and complex action against the federal and Ontario governments

• Co-counsel to a technology and power transmission company in a large arbitration arising from a dispute relating to the construction of converter stations

• Advising companies in the oil and gas sector on investment treaty considerations in relation to provincial government measures

• Co-counsel to a client in defence of a third-party claim relating to contaminated lands

• Co-counsel to a client in defence of a third-party claim relating to an environmental impact assessment study

• Co-counsel to the owner of an energy plant in a complex multi-party construction litigation involving several interrelated court actions

• Co-counsel to a supplier of industrial gases in a contract dispute with a distributor

• Co-counsel to a mining and natural resources company in an appeal of a decision of the Ontario Mining and Lands Commissioner relating to an easement over unpatented mining claims

• Co-counsel in an arbitration of disputes under right-of-way agreements between governmental corporations and energy pipeline companies

• Co-counsel in an arbitration of disputes between two air carriers over payments to be made under a capacity purchase agreement

• Co-counsel to a mining and natural resources company in a judicial review application related to a federal environmental assessment

Iris has been recognized as a leading lawyer in the following publications:

• The Best Lawyers in Canada (2025–2026: International Arbitration; 2026: Alternative Dispute Resolution)

• The Canadian Legal Lexpert Directory – 2022–2025 (Commercial Arbitration)

• Benchmark Canada: The Definitive Guide to Canada's Leading Litigation Firms and Attorneys (2025: Litigation Star – Arbitration, Commercial; 2024: Future Star)

• Benchmark Canada's 40 & Under List – 2020–2023

• Lexpert Rising Stars: Leading Lawyers 40 and Under 2022

Iris is a fellow of the Chartered Institute of Arbitrators (FCIArb), a member of the ICC Canada Arbitration Committee, Young Canadian Arbitration Practitioners (YCAP), an advisory board representative with the Institute of Transnational Arbitration (ITA), and a member of the Canadian and Ontario Bar Associations.

• Co-author : Borders, Barriers and Benefits: Inter-Canadian Investment Protections
  Blakes Bulletin on Litigation & Dispute Resolution / Arbitration, March 3, 2025.
• Co-author : Court of Appeal Confirms Limited Scope of Judicial Oversight of Arbitral Awards
  Blakes Bulletin on Arbitration, July 30, 2024.
• Co-author : United Kingdom Signs On to Comprehensive and Progressive Agreement for Trans-Pacific Partnership
  Blakes Bulletin on Investment Treaty Arbitration, July 17, 2023.

• Speaker : Commercial Litigation: Top Cases in Canada
  Blakes Business Class Seminar, Toronto, Ontario, February 29, 2024.
• Speaker : From Court to Contract
  Blakes Business Class Seminar, Toronto, Ontario, November 8, 2023.

Admitted to the Ontario Bar – 2009
IBBA, York University, Schulich School of Business – 2005
JD, University of Toronto – 2008