John B. Laskin

John B. Laskin

Toronto: 416.865.7317
Fax 416.865.7380


LLM, 1977
University of California
LLB (Gold Medalist), 1976
University of Toronto
BA, 1971
York University

Bar Admissions

Ontario, 1979 Alberta, 1987


John Laskin is a senior trial and appellate counsel with a broad practice in business litigation and an emphasis on administrative and constitutional law, competition law and class actions. He has appeared as counsel in the Supreme Court of Canada, in the Federal Court and Federal Court of Appeal, at every level of court in Ontario, in the courts of Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia and Yukon, in domestic and international commercial arbitrations and before a variety of administrative tribunals. He has also served as an arbitrator.

In addition to representing numerous prominent private sector clients, John has also acted for industry organizations such as the Canadian Bankers Association and the Investment Industry Association of Canada, and public agencies and corporations such as the Commissioner of Competition, Ontario’s Chief Electoral Officer, Ontario Power Generation and Canada Post. John speaks, writes and teaches frequently on public law, competition and advocacy issues, and is the editor for civil cases of Canadian Charter of Rights Annotated.

Representative Work

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Best Lawyers' Best Lawyers in Canada—Leading lawyer in administrative and public law, bet-the-company litigation, class action litigation, competition/antitrust law, international arbitration, corporate/commercial litigation, defamation and media law, director and officer liability and securities (2006-2017)

Chambers & Partners’ Chambers Canada—Leading lawyer in Canada, competition/antitrust: litigators; Canada, dispute resolution: arbitration; Ontario, dispute resolution (2016-2017) 

Lexpert/American Lawyer Media’ Guide to the Leading 500 Lawyers in Canada—Leading lawyer in corporate commercial litigation (2015-2016)

The Legal 500 Canada—Leading lawyer in dispute resolution: Ontario (2014-2016)

Chambers & Partners' Chambers Global: The World’s Leading Lawyers for Business, The Client’s Guide—Leading lawyer in competition/antitrust litigation, arbitration, and in dispute resolution (Ontario) (2008-2016)

Lexpert/Thomson Reuters' Canadian Legal Lexpert Directory—Leading lawyer in class actions, corporate commercial litigation, public law litigation, directors’ & officers’ liability litigation, securities litigation, professional liability, international commercial arbitration (2008-2015), competition (2015), and defamation & media litigation (2013-2015)

Law Business Research’s Who’s Who Legal: Canada—Leading lawyer in commercial litigation (2013-2015)

Legal Media Group's Benchmark Canada—Local Litigation Star – Ontario (2014); Leading litigator in class actions, competition (2012-2014), commercial (2012-2013), constitutional (2013), intellectual property, product liability, professional liability, securities and white-collar crime (2012)

Lexpert/ALM Guide to the Leading 500 Lawyers in Canada—Leading lawyer in corporate/commercial litigation (2008-2015) and directors’ and officers’ liability (2008)

Lexpert's Guide to the Leading US/Canada Cross-border Litigation Lawyers in Canada—Leading lawyer in class actions and corporate commercial (2012-2013)

Intellectual Asset Management’s IAM Patent Litigation 250: The World’s Leading Patent Litigators 2011—Leading lawyer globally

IAM Life Sciences 250: The World’s Leading Life Sciences Patent Litigators 2010—Leading lawyer globally

Best Lawyers—Toronto administrative and public lawyer of the year (2011); Leading lawyer in administrative and public law, bet-the-company litigation, class action litigation, competition/antitrust law, international arbitration, litigation, corporate/commercial litigation, defamation and media law, director and officer liability and securities (2009-2012)

PLC’s Which Lawyer? Yearbook—Leading lawyer in Ontario in dispute resolution (2007-2012)

Guide to the World’s Leading Litigation and Product Liability Lawyers—Leading lawyer in Canada (2012)

Guide to the World’s Leading Competition & Antitrust Lawyers—Leading lawyer in Canada (2012)

LawDay 2009—Leading lawyer in class action/defence, complex litigation and white collar crime

PLC’s Cross-Border Dispute Resolution Handbook—Leading practitioner in dispute resolution (2008 and 2009)


Supreme Court Addresses Provincial Regulation of Banks and Class Action Standing in Bank of Montreal v. Marcotte Trilogy

Republished in National Banking Law Review’s December issue.

Moving Forward after the Securities Act Reference: The Future of Securities Regulation in Canada

Commercial Litigation and Arbitration Review, vol. 1, no. 1

Defending Competition Class Actions in Canada: New Challenges and Next Steps

Presenter, Canadian Bar Association 2010 Annual Fall Conference on Competition Law


Professional Involvement

John is a Fellow of the American College of Trial Lawyers, a Senior Fellow of the Litigation Counsel of America, a Fellow of the Chartered Institute of Arbitrators and a member of the Ontario Regional Committee of the Supreme Court Advocacy Institute. In 2015, John was awarded the Law Society Medal, an award given by the Law Society of Upper Canada for outstanding service within the legal profession.

Before entering private practice in 1982, John was assistant and associate professor in the Faculty of Law at the University of Toronto; he remained there for several years as a part-time lecturer on constitutional litigation. He has been vice-chair of the Constitutional and International Law Section of the Ontario Bar Association and a member of the Canadian Bar Association Task Force on Constitutional Amendment Processes. He has recently completed a term as president of the University of Toronto Law Alumni Association.

Memberships and Affiliations

The Advocates' Society