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Affleck Greene McMurtry LLP | Barristers
John Rook

John Rook

John Rook


In his more than 50-year career, John Rook has assisted clients in developing practical and innovative strategies for prosecuting and defending civil, criminal and administrative proceedings, and responding to regulatory investigations. He has been engaged in complex litigation throughout his career and has appeared before the Competition Tribunal, the Federal Court Trial division and the Federal Court of Appeal, several provincial courts of appeal and the Supreme Court of Canada.  He has represented the Commissioner of Competition on numerous occasions and acted as counsel before the Competition Tribunal and the Federal Court of Appeal in the largest merger in Canadian history.  He has also represented clients in matters relating to negligence and products liability claims, contracts, class actions, claims against directors and officers, energy, public utilities boards, telecommunications and broadcasting, among others.

John is cited by clients and peers in leading legal directories for his skill and creativity:

"He is truly amazing – his years of experience are invaluable."

"One of the best in the business."

"A professional, innovative approach to problems."

Practice Areas

  • Corporate and Commercial Litigation
  • Competition Law
  • Class Action Litigation
  • Shareholder & Partnership Disputes
  • Regulatory and Administrative Law

Other Practice Areas

Show More Practice Areas
  • Advertising & Marketing Practices
  • Alternate Dispute Resolution
  • Anti-trust
  • Appellate Counsel
  • Arbitration (domestic and international, ad hoc and institutional)
  • Banking Litigation
  • Civil Anti-Competitive Conduct
  • Civil Litigation
  • Commercial Law
  • Competition Bureau Investigations
  • Competition Criminal Matters
  • Competition Law (Antitrust)
  • Competition Litigation
  • Competition Marketing Practices
  • Competition Tribunal Litigation
  • Complex Litigation
  • Constitutional Law
  • Contract Disputes
  • Corporate Governance
  • Corporate Law
  • Criminal & Civil Anti-Competitive Conduct
  • Criminal Matters
  • Employment Law
  • Franchise Litigation
  • Fraud, Misrepresentations, Deceit
  • General Litigation
  • Injunctions
  • Inquests
  • Libel & Slander
  • Libel & Slander Litigation
  • Mass Torts
  • Mergers
  • Partnership Litigation
  • Products Liability
  • Professional Discipline Law
  • Professional Regulation
  • Senior Trial
  • Shareholder Disputes
  • Tribunal Hearings
  • White Collar Defence
  • Wrongful Dismissal


  • Real Estate
  • Retail
  • Securities
  • Transportation
  • Airlines
  • Banking
  • Construction
  • Franchising
  • Insurance
  • Manufacturing
  • Public Office Holders


John has advised on many of the most noteworthy matters that have shaped common law jurisprudence and competition regulation in Canada, including:

  • Commissioner of Competition v. Rogers Communications Inc., Shaw Communications Inc., and Videotron Ltd., where the Commissioner unsuccessfully challenged Rogers acquisition of the Shaw’s wireline business and the sale of Shaw’s wireless business to Videotron;
  • Commissioner of Competition v. Toronto Real Estate Board, where the Competition Tribunal ordered the board to make sales and related information available to its members for use and display on their websites for the benefit of consumers;
  • Bow Valley Husky (Bermuda) Ltd., v. Saint John Ship Building, where the Supreme Court clarified the rules for the recovery of pure economic loss in negligence claims;
  • National Bank Financial Ltd. v. Potter, involving several decisions of the Supreme Court of Nova Scotia and the Nova Scotia Court of Appeal relating to claims for damages arising out of the collapse of Knowledge House Inc.;
  • The Commissioner of Competition v. Parkland Industries Ltd. – a merger where the Competition Tribunal discussed the legal principles that apply to interim orders under section 104 and conducted the first mediation under the Competition Act;
  • Pioneer Corp. v. Godfrey, in the Supreme Court of Canada relating to the certification of class actions for claims for damages for direct and indirect purchasers in the sale of consumer electronic products;
  • Granovsky v. Canada– a decision of the Supreme Court concerning equality rights of disabled persons denied benefits under the Canada Pension Plan;
  • R. v. Simon – where the Supreme Court recognized the pre-confederation Aboriginal treaties under section 25 of the Canadian Charter of Rights and Freedoms;
  • Public Utilities Board v. Manitoba Public Insurance Corporation– a decision of the Manitoba Court of Appeal limiting the powers of the Board in connection with the regulation of Manitoba's automobile insurance corporation.
  • Canada (Commissioner of Competition) v. Superior Propane– where the Competition Tribunal and the Federal Court of Appeal elaborated the efficiencies defence under section 96 of the Competition Act;
  • Bell Canada/Unitel/Callnet (Telecom Decision CRTC 92-12) –  where the Canadian Television and Telecommunications Commission permitted the interconnection of telecommunications networks to facilitate competition in long distance services;
  • Stelco Inc. v. Canada (Attorney General)– where the Supreme Court of Canada discussed the protection available to suspects for compelled testimony in an Inquiry under the Competition Act;
  • R. v. Hamilton Funeral Homes– the only successful merger prosecution under section 33 of the Combines Investigation Act.

John has also been designated as a Fellow of the Chartered Institute of Arbitrators.


  • LL.B., University of Toronto Faculty of Law, 1971
  • B.A. (Honours), Queen's University, 1968


John is a director on the Board of St. Andrews' College and past Chair of the Board of Trustees of the St. Andrews' College Foundation.  He is also president of the University Club of Toronto and, for many years, he was a member of the Board of the Stratford Shakespeare Festival Board of Directors as well as the Board of the Stratford Shakespeare Foundation.

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