LAWYER PROFILE
Catherine Beagan Flood

Catherine Beagan Flood

Canada 2026

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Chambers ranking badge

Ranked in 4 practice areas

About

Provided by Blake, Cassels & Graydon LLP

Practice Areas

Cathy is the co-Practice Group Leader of the Toronto Litigation group and also leads Blakes National Cybersecurity Working Group. Cathy has appeared before the Supreme Court of Canada in 20 appeals. Her national litigation practice has involved arguing before the trial courts of every province, in addition to appellate courts across Canada and a wide range of administrative and arbitration tribunals. She litigates complex commercial and regulatory cases and defends class actions with a regulatory component. In particular, she is currently defending clients in multiple privacy, antitrust, product liability and consumer protection class actions. Cathy has also represented the House of Commons before Commissions of Inquiry and has been counsel to and given evidence to provincial and federal legislative committees.

Career

Cathy clerked for the Honourable Antonio Lamer, Chief Justice of Canada from 1997 to 1998. She taught information and privacy law at Osgoode Hall Law School from 2000 to 2008.

Personal

Cathy obtained an LLM from Harvard Law School, an LLB from Osgoode Hall Law School and a BA from the University of Prince Edward Island.

Chambers Review

Provided by Chambers

Chambers Canada Guide

Privacy & Data Protection - Nationwide - Canada

Band 3
Band 3

Individual Editorial

Catherine Beagan Flood is experienced in handling privacy breach class actions and demonstrates additional knowledge assisting clients with responses to ransomware attacks.

Litigation: Administrative & Public Law - Ontario

Band 3
Band 3

Individual Editorial

Catherine Beagan Flood is an experienced litigator who frequently assists clients with a broad range of complex commercial disputes. She is based in Blake, Cassels & Graydon's Toronto office and is noted in particular for her ability to handle contentious matters in the telecommunications and energy sectors.

Dispute Resolution: Class Action (Defence) - Nationwide - Canada

Band 3
Band 3

Individual Editorial
Catherine Beagan Flood is well regarded for her representation in product liability and privacy-related class actions. She also has experience in high-stakes antitrust class proceedings.

Litigation: General Commercial - Ontario

Band 4
Band 4

Individual Editorial

Catherine Beagan Flood is an experienced litigator who frequently assists clients with a broad range of complex commercial disputes. She is based in Blake, Cassels & Graydon's Toronto office and is noted in particular for her ability to handle contentious matters in the telecommunications and energy sectors.

Strengths

Provided by Chambers

  • Cathy provides consistently timely, practical and valuable advice.

    Privacy & Data ProtectionChambers Canada Guide
  • She is thoughtful and very knowledgeable.

    Privacy & Data ProtectionChambers Canada Guide
  • Cathy Beagan Flood has earned her esteemed reputation. She is highly competent, practically-minded and a strong communicator.

    Privacy & Data ProtectionChambers Canada Guide
  • Catherine is a valued member of the team on matters that are challenging, particularly where they require legal-oriented analysis.

    Litigation: Administrative & Public LawChambers Canada Guide
  • She is a strategic thinker, thinks big picture and prioritises client service.

    Litigation: Administrative & Public LawChambers Canada Guide
  • She is top notch.

    Litigation: Administrative & Public LawChambers Canada Guide

Ranked Individuals at Blake, Cassels & Graydon LLP (236)

Alberta

British Columbia

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