Keith Marlowe, KC, is a veteran litigator whose broad practice focuses on corporate disputes, class actions, construction and infrastructure litigation and insurance coverage matters. Experienced in both courtroom advocacy and arbitration, he regularly acts in complex cases before Canadian courts and arbitration panels.
Keith has appeared as lead counsel before the Supreme Court of Canada and courts in Alberta, Saskatchewan, British Columbia, Manitoba and Ontario, as well as before courts in New York and Texas. Licensed to practice in multiple jurisdictions, including Alberta, Ontario, New York, Massachusetts, Washington, D.C., and England and Wales, Keith brings a diverse perspective to his legal practice.
Clients describe Keith as “smart, articulate, and an excellent litigator” and “probably the best guy I have seen in court.” In 2022, he was appointed King’s Counsel in recognition of his contributions to the legal profession and the community. He has been recognized by Chambers Canada, Benchmark Litigation, The Legal 500, The Canadian Legal Lexpert Directory, The Best Lawyers in Canada and Thomson Reuters.
Keith is Chair of the Legal Archives Society of Alberta, Chair of the Calgary Stampede Parade Committee, and an appointed member of the Alberta Judicial Compensation Commission and the Alberta Justices of the Peace Compensation Commission.
Latest Insights
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Osler Update May 26, 2026
Looking beyond the last cause: insurance coverage for multi-cause losses
The decision confirms that the last event in the chain may not be the event that determines coverage.
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Awards and Recognition
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Chambers Canada: Recognized as “Up and Coming” in Insurance: Dispute Resolution, 2024–2025
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Benchmark Canada: Litigation Star, 2026
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The Legal 500: Insurance, 2025
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The Canadian Legal Lexpert Directory: Recognized in Class Actions, 2023–2025
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The Best Lawyers in Canada: Director and Officer Liability, 2025; Alternative Dispute Resolution and Class Action Litigation, 2024–2025; Corporate and Commercial Litigation, 2022–2025; Energy, 2022–2025; Product Liability Law, 2022–2025
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Thomson Reuters: “Stand-out Lawyer,” 2019–2025
Media Mentions
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Osler News May 6, 2026
17 Osler lawyers recognized in Lexpert Special Edition: Infrastructure 2026
Osler is pleased to announce that 17 of our lawyers are featured in the Lexpert Special Edition: Infrastructure 2026. This special issue...
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Osler News June 16, 2025
Keith Marlowe, KC, becomes a Fellow of the Litigation Counsel of America
Osler is proud to announce that Keith Marlowe, KC, has become a Fellow of the Litigation Counsel of America, an invitation-only honorary society...
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Osler News June 10, 2025
Keith Marlowe, KC, joins Osler’s Disputes group as a partner
Keith is a veteran litigator whose broad practice focuses on corporate and commercial disputes, including cross-border disputes and class actions.
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Community Involvement
- Legal Archives Society of Alberta, Chair
- Calgary Stampede Parade Committee, Chair
- Alberta Judicial Compensation Commission and Alberta Justices of the Peace Compensation Commission
Credentials
Education
- University of Detroit Mercy, JD (Summa Cum Laude)
- University of Windsor, LLB (Board of Governors’ Medal)
Languages
- English
Professional Affiliations
- Fellow, Litigation Counsel of America
- Law Society of Alberta
- Law Society of Ontario
