Guy’s practice focuses on complex and high-stakes litigation.
For over 40 years, he has advised in a wide range of fields, including tax, corporate, criminal, constitutional and environmental law. He has particular expertise and success in representing clients in class actions and mass tax appeals.
Guy’s strategic counsel and fearless advocacy skills have established him as a leader in his field. He is ranked in Band 1 in Chambers Canada for Dispute Resolution: Québec and Tax: Litigation.
In 2014, he was awarded the Tax Court of Canada Medal in recognition of his services to the Tax Court.
Canadian Civil Liberties Association
Acted for the Canadian Civil Liberties Association as intervener in S.L. v. Commission scolaire des Chênes, in which the Supreme Court of Canada had to decide the circumstances under which parents may request that their children be excused from attending mandatory classes on the basis that they interfere with their freedom of religion.
Acted for BCE Inc. and Bell Canada in a successful appeal to the Supreme Court of Canada in a landmark commercial case involving the proposed $51.7 billion privatization of BCE. The decision of the Supreme Court in this case set the standard in Canada for approval of plans of arrangement and claims of oppression. It also clarified the law concerning the duties of directors of public companies faced with potential change of control transactions. This case also resulted in the fastest commercial appeal ever heard by the Supreme Court of Canada. The appeal was heard by the Court and decided unanimously in favour of BCE less than 30 days after BCE launched its application for leave to appeal from a decision of the Québec Court of Appeal revoking approval for BCE's proposed plan of arrangement that had been granted by Justice Silcoff of the Quebec Superior Court following a lengthy and highly expedited trial.
Ludco Enterprises Ltd.
Acted for Ludco Enterprises Ltd. in its successful challenge of federal income tax assessments in relation to the issue of deductibility of interest on borrowed money used to purchase shares (before the Tax Court of Canada, the Federal Court of Canada, the Federal Court of Appeal and the Supreme Court of Canada).
Acted successfully for Concordia University in the Bisaillon v Concordia University case before the Supreme Court of Canada. Davies argued that the Superior Court had no jurisdiction to entertain a class action initiated by Bisaillon claiming the payment by Concordia of well over $100 million to the pension fund of its employees.
Canadian Chamber of Commerce
Acted successfully on behalf of the Canadian Chamber of Commerce in favour of Wal-Mart before the Supreme Court of Canada in an appeal concerning the scope of the employer's right to cease operations, even where the alleged reason for the business closure was the employer's unwillingness to deal with a union that had recently obtained certification of the workplace. The majority of the Supreme Court held that although anti-union animus could, in principle, constitute the basis for awarding compensation under the unfair labour practice provisions of the Québec Labour Code, the wrongful dismissal provisions assumed the continued existence of a workplace.
Acting for a confidential client, as an innocent third party in an investigation, led by the Québec's permanent anti-corruption unit (PACU).
Beauward Real Estate inc., Schokbeton Québec Inc. and Saramac
Acted successfully for Beauward Real Estate inc., Schokbeton Québec Inc. and Saramac on a challenge of search warrants and communication orders issued by a judge and executed in multiple locations by the Agence du revenu du Québec as part of the Permanent Anti-Corruption Unit of Québec.
Acting on behalf of confidential clients in a challenge of multiple search warrants executed in multiple locations by the Québec's Revenue Agency.
Hillcore Financial Corporation
Acting for Hillcore Financial Corporation and related entities (the Taxpayers) in their dispute before the Tax Court of Canada with respect to trading in foreign exchange derivative contracts.
Mario Montminy et al.
Successfully represented Mario Montminy and others at the Federal Court of Appeal against the Canada Revenue Agency in a stock option deduction dispute. The court sided with the taxpayers on the eligibility of their deductions.
American College of Trial Lawyers—Fellow
Québec Bar—Lawyer Emeritus Distinction
Chambers Global: The World’s Leading Lawyers for Business—Tax: Litigation (Band 1); Dispute Resolution: Litigation
Chambers Canada: Canada’s Leading Lawyers for Business—Litigation, General Commercial: Québec (Band 1); Tax: Litigation (Band 1)
Benchmark Canada’s Hall of Fame Award—Recipient
Benchmark Canada: The Definitive Guide to Canada’s Leading Litigation Firms & Attorneys—Top 50 Trial Lawyers in Canada (2017-2020)
Benchmark Canada: The Definitive Guide to Canada’s Leading Litigation Firms & Attorneys—Arbitration (Litigation Star); Commercial (Litigation Star); Criminal (Litigation Star); Tax Disputes (Litigation Star)
International Tax Review’s Tax Controversy Leaders
International Tax Review’s World Tax: The Comprehensive Guide to the World’s Leading Tax Firms—Tax Controversy
The Legal 500 Canada—Dispute Resolution: Québec (Leading Lawyer); Tax (Leading Lawyer)
The Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada—Litigation: Corporate Tax
Report on Business/Lexpert Special Edition Canada’s Leading Litigation Lawyers
Lexpert Guide to US/Canada Cross-Border Lawyers in Canada—Dispute Resolution
The Canadian Legal Lexpert Directory—Litigation: Corporate Tax (Most Frequently Recommended); Estate and Personal Tax Planning: Estate Litigation; Litigation: Public Law
The Best Lawyers in Canada—Alternative Dispute Resolution; Appellate Practice (Lawyer of the Year 2021, Montréal); Bet-the-Company Litigation; Criminal Defence; Corporate and Commercial Litigation; Tax Law (Lawyer of the Year 2017, Montréal)
Tax Court of Canada Medal—for services to the Tax Court
Ordre du mérite, University of Ottawa Faculty of Law Civil Law Section
Association des avocats de la défense de Montréal— for his 40 years of criminal law practice
Expert Guides’ Best of the Best; Expert Guides—White Collar Crime