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David Ziegler

David A. Ziegler

Partner Fasken
Recent high-profile cases have highlighted the seriousness with which the courts view the misuse of confidential corporate information by competitors.
Jurisdiction Ontario, 2015 | New York, 2011
Language(s) English
Office(s) Toronto
David Ziegler has a broad civil litigation and arbitration practice, with a focus on complex commercial and financial disputes, international arbitration, and securities class actions. David regularly represents clients across a wide range of industries, including mining, rail, professional services, insurance, banking and finance, and construction.

David also has expertise both in managing e-Discovery projects using modern processing tools and handling matters requiring urgent and extraordinary relief, including injunctions.

An active volunteer, David regularly volunteers as a Duty Counsel at the Toronto Small Claims Court, providing assistance to unrepresented litigants as part of the Pro Bono Law Ontario Duty Counsel Project.

Prior to joining the firm, David practiced in New York as an associate with Morrison & Foerster LLP. While there, David gained experience in securities litigation and general commercial disputes, as well as in the representation of individuals in NY state and U.S. federal government investigations.
  • Archibald R. Murray Public Service Award, 2010, 2010
2010 Archibald R. Murray Public Service Award, 2010


  • JD Fordham Law School
  • BA Wesleyan University

Community involvement

  • Pro Bono Law Ontario Duty Counsel Project

Memberships & Affiliations

  • Member, Law Society of Upper Canada
  • Member, Canadian Bar Association
  • Member, Advocates’ Society
  • Member, Young Canadian Arbitration Practitioners
  • Member, New York State Bar Association
  • Member, International Arbitration brainstorming group, Sedona Conference Working Group 6
  • Member-at-large, OBA Alternative Dispute Resolution Executive Committee
  • Secretary, Canada Advisory Board, International Institute for Conflict Prevention & Resolution
Article U.S. Federal Prosecutors Achieve Resounding Victory in Tipping Case Timely Disclosure
Article Clarity for Issuers on Securities Class Actions Issues from Supreme Court of Canada Timely Disclosure
Misuse of Corporate Confidential Information Fasken Martineau Mini-Symposium location location Toronto


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