David V. Tupper
Partner | Calgary
Calgary: 403-260-9722

Detailed Profile

David's litigation practice involves all aspects of corporate/commercial litigation with an emphasis on construction law, securities law, insurance law, environmental law, and oil and gas law. He regularly appears before all levels of courts in Alberta as well as in the Federal Court and the Federal Court of Appeal. In securities matters, he frequently appears before the Securities Commission of Alberta.

David also maintains a considerable advisory practice in connection with environmental issues, property and liability policies, and reinsurance losses.


  • Acted as litigation counsel to Suncor in its hostile take-over of Canadian Oil Sands
  • Acted in a number of arbitrations related to claims of cost overruns and delays in construction of a large oil sands facility
  • Acted in an arbitration with respect to pipeline cost-of-service arrangements
  • Represented AMEC Foster Wheeler in a long litigation involving construction of a magnesium oxide plant in Jordan
  • Represented EPCOR Utilities Inc. and Capital Power Corporation in defence of an action to enjoin a C$3-billion transaction on the basis of deficient approval by the shareholder and the City of Edmonton
  • Acted in an international commercial arbitration (valued at over C$800-million) involving construction and insurance issues in the oil sands
  • Acted for a multinational construction company in defence of allegations of negligent design and gross negligence in project management relating to an international construction project
  • Led defence of Agrium in an action involving, among other things, allegations that Agrium breached a change of control agreement relating to the grant and valuation of options
  • Appeared before the Alberta Energy Regulator in a significant dispute over enhanced recovery in an oil pool
  • Acted for Dominion Exploration Canada Ltd. in a dispute over gas well ownership
  • Represented a large multinational energy company in a dispute over contamination arising from refinery lands
  • Acted as an umpire pursuant to the Insurance Act in valuation disputes
  • Regularly provides advice about insurance coverage issues and acts in related litigation
  • Defended a number of class actions involving banking issues, consumer credit and competition issues

David is recognized for his expertise in litigation in the following awards and publications:

  • The Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada 2018 (Corporate Commercial Limitation)
  • Chambers Canada: Canada's Leading Lawyers for Business – 2016-2018 (Litigation: General Commercial – Alberta; Insurance: Dispute Resolution – Canada): “David Tupper maintains a strong position in the market and is regarded by clients as ‘a bet the company litigation lawyer that we would go to on very serious litigation matters.’ One interviewee added: ‘He is a litigator who knocks it out of the park.’"
  • The Best Lawyers in Canada - 2011-2018 (Corporate and Commercial Litigation, Alternative Dispute Resolution, Class Action Litigation, Insurance Law, Product Liability Law, Appellate Practice and Directors & Officers Liability)
  • The Legal 500 Canada - 2015-2018 (Listed in the elite "Leading Lawyers in Canada" list for Dispute Resolution)
  • Best Lawyers' 2018 Calgary Product Liability Law "Lawyer of the Year"
  • Lexpert's Special Edition on Litigation: Canada's Leading Litigation Lawyers - 2013-2017 (Ranked Lawyer)
  • Lexpert’s Special Edition on Energy: Canada’s Leading Energy Lawyers 2017
  • Benchmark Canada Awards Alberta Litigator of the Year 2017
  • Best Lawyers' 2017 Calgary Class Action Litigation "Lawyer of the Year"
  • Chambers Global: The World's Leading Lawyers for Business - 2009-2017 (Alberta - Dispute Resolution): "David Tupper 'is a prominent name' in litigation in Alberta and is praised by clients for his wide-ranging skill set...." Other comments include: "very well-reasoned, very persuasive, and a very calm court presence," "has a tremendous ability to listen to clients, understand the issues and convert that to a successful strategy" and "smart, effective, no nonsense and moves very quickly."
  • Who's Who Legal: Insurance & Reinsurance - 2015, 2017 (Insurance & Reinsurance)
  • Who's Who Legal: Commercial Litigation 2017
  • Who's Who Legal: Construction 2017

  • The Canadian Legal Lexpert Directory - 2014-2017 (Repeatedly Recommended: Litigation - Corporate Commercial); 2016-2017 (Repeatedly Recommended: Litigation - Commercial Insurance); 2017 (Repeated Recommended: Construction Law and Class Actions)
  • Benchmark Canada: The Definitive Guide to Canada's Leading Litigation Firms and Attorneys - 2013-2016 (Litigation Star - Construction; Energy and Natural Resources; Insurance; General Commercial). "David has an ability to anticipate and in certain instances defuse situations before they become major issues. With that said, I did get the opportunity to see him in the court room and I was very glad he was on my side!"
  • The Lexpert Guide to the Leading US/Canada Cross-Border Litigation Lawyers in Canada - 2013-2016 (Ranked as a Litigation Lawyer to Watch)
Show Past:
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Blakes Bulletin on Litigation & Dispute Resolution, November 30, 2016
Blakes Bulletin on Litigation & Dispute Resolution, August 8, 2016.
Blakes Bulletin on Litigation & Dispute Resolution and Tax, June 8, 2016.
Blakes Bulletin on Litigation & Dispute Resolution and Securities Litigation , May 5, 2016.
Blakes Bulletin on Litigation & Dispute Resolution, November 2, 2015.
Blakes Bulletin on Litigation & Dispute Resolution, July 2015.
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Panel Speaker: Cross Country Check Up, and Beyond
Ontario Bar Association 9th Annual Class Action Colloquium, Toronto, Ontario, December 4, 2017.
Speaker: Case Law Update: Important Takeaways for Every Infrastructure Professional
Legal Issues in Project Management and Infrastructure Development conference, Canadian Institute, Calgary, September 26-27, 2017.
Co-speaker: Arrangements under the Business Corporations Act
Seventh Annual Securities Symposium, The Advocates' Society, Toronto, Ontario, September 11, 2017.
Co-speaker: How to Beef Up Remedy Provisions in this Economy
Advanced Contract Negotiations - Part II, Association of Corporate Counsel, Alberta Chapter, Calgary, Alberta, June 1, 2017.
Speaker: To Arbitrate or Litigate
Panel Discussion, 16th Annual Spring Symposium: The Advocate Matters, The Advocates' Society, Toronto, Ontario, April 27, 2017.
Co-chair: A Special Litigation Presentation: Arbitration Advocacy
The Advocates' Society, Calgary, Alberta, November 3, 2016.
Co-speaker: Evidence in Construction Arbitration/Delay Claims
CBA Construction and Infrastructure Law Conference: Building Canada In Today's Economy, Banff, Alberta, April 1-2, 2016.
Co-chair: Examining and Cross-examining Experts: Winning Strategies, Trends and Solutions
The Advocate's Society Teaching Seminar, Calgary, November 3, 2015.
Co-speaker: Legal Panel
Calgary Risk and Insurance Education Forum, Blakes and Charles Taylor Adjusting, Calgary, Alberta, October 26, 2015.
Panel Speaker: Dispute Resolution in Energy Mega-Projects
9th Annual Western Canada Commercial Arbitration Society Energy, Mining and Resources Arbitration Conference, The Ranchmen's Club, Calgary, Alberta, May 12, 2015.
Speaker: Negotiated RFPs - Risks and Rewards of Taking Flexible Tendering Formats
Mastering RFPs for a Winning Supply Chain, Canadian Institute, Calgary, March 10, 2015.
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