Adam Hirsh

Adam Hirsh

Partner, Litigation

Contact Information

tel: 416.862.6635



Adam practices complex, high-stakes commercial and corporate litigation for both Canadian and global companies. His expertise is broad ranging, covering commercial disputes and private arbitration, class action defence (with a focus on competition, consumer protection and product liability claims), tax disputes and insolvency matters.

Adam is a highly versatile litigator and a quick study. He masters the finer details of his clients’ businesses and uses that knowledge to win their cases on their terms, be it at trial or by way of carefully crafted settlement. Companies value Adam’s candor, financial acuity, real-time responsiveness, strategic counsel and tireless drive to accomplish their litigation goals.

Adam is recognized as a Future Litigation Star and in the 40 and Under Hot List by Benchmark Litigation, and in the 2022 Edition of Best Lawyers Canada in Corporate and Commercial Litigation. He is the co-author of the chapter on business and commercial litigation in Canada in the highly regarded treatise Business and Commercial Litigation in the Federal Courts, 5th Ed. (Thomson Reuters).

    • Nieuport Aviation as lead trial counsel in obtaining a judgment of over $130 million against Porter Airlines in the case of Porter Airlines Inc. v. Nieuport Aviation Infrastructure Partners GP, 2022 ONSC 5922
    • Expedia in successfully defending against certification of a proposed competition and consumer protection class action relating to online advertising practices: Hoy v. Expedia Group Inc., 2022 ONSC 6650
    • Maple Leaf Foods in successfully defending against certification of a class proceeding relating to alleged price fixing in the bread industry: David v. Loblaw Companies Limited, 2021 ONSC 7331
    • A real estate development company in a dispute arising from a co-tenancy agreement: 1107051 Ontario Ltd. v. GG Kingspa Enterprises Limited Partnership, 2022 ONSC 1847
    • A large cannabis manufacturer in a confidential arbitration relating to a long-term supply agreement.
    • An estate in a dispute related to a limited partnership: Canadian Home Publishers Inc. v. Parker, 2018 ONSC 4427 and 2019 ONCA 314.
    • Taxpayers in an appeal of reassessments relating to their participation in a limited partnership and charitable donation program: Cassan v. The Queen, 2017 TCC 174
    • A taxpayer in the first case to address Ontario’s provincial GAAR and its application to interprovincial tax planning: Inter-Leasing Inc. v. Ontario (Ministry of Revenue), 2014 ONCA 575, rev’g 2013 ONSC 2927
    • Jazz Aviation in a complex cost benchmarking arbitration against Air Canada
    • Nortel Networks’ Board of Directors in Nortel’s global restructuring under CCAA and Chapter 11 proceedings.

  • Benchmark Litigation Canada: Recognized as "Future Star"; "40 & Under List"
  • Best Lawyers in Canada: Recognized in Corporate and Commercial Litigation

  • Pro Bono Law Ontario, Volunteer

  • Law Society of Ontario
  • Canadian Bar Association
  • Ontario Bar Association
  • Advocates’ Society
  • Toronto Lawyers Association

  • Chapter 14 – Business and Commercial Litigation in Canada (co-author), in Business and Commercial Litigation in the Federal Courts, 5th Ed. Robert L. Haig, Editor-in-Chief, Thomson Reuters, 2021.