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Catherine Beagan Flood
Lawyers profile
Canada 2026
Lawyers profile | Canada 2026: Dispute Resolution: Class Action (Defence), Litigation: Administrative & Public Law, Privacy & Data Protection, Litigation: General Commercial
Catherine Beagan Flood
Ranked in 4 Practice Areas
3

Band 3

Dispute Resolution: Class Action (Defence)

Nationwide - Canada

6 Years Ranked

3

Band 3

Litigation: Administrative & Public Law

Ontario

1 Years Ranked

3

Band 3

Privacy & Data Protection

Nationwide - Canada

3 Years Ranked

4

Band 4

Litigation: General Commercial

Ontario

4 Years Ranked

About

Provided by Catherine Beagan Flood

Canada

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

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.

Learn more about this team❖View ranking table

Litigation: Administrative & Public Law - Ontario

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.

Learn more about this team❖View ranking table

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

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.
Learn more about this team❖View ranking table

Litigation: General Commercial - Ontario

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.

View ranking table

Strengths

Provided by Chambers

Cathy provides consistently timely, practical and valuable advice.

Privacy & Data Protection respondent
Chambers Canada Guide

She is thoughtful and very knowledgeable.

Privacy & Data Protection respondent
Chambers Canada Guide

Cathy Beagan Flood has earned her esteemed reputation. She is highly competent, practically-minded and a strong communicator.

Privacy & Data Protection respondent
Chambers 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 Law respondent
Chambers Canada Guide

She is a strategic thinker, thinks big picture and prioritises client service.

Litigation: Administrative & Public Law respondent
Chambers Canada Guide

She is top notch.

Litigation: Administrative & Public Law respondent
Chambers Canada Guide

Catherine is an incredible lawyer.

Dispute Resolution: Class Action (Defence) respondent
Chambers Canada Guide

Catherine is very bright and an exceptionally good researcher.

Dispute Resolution: Class Action (Defence) respondent
Chambers Canada Guide

Catherine is a master strategist with vision and impeccable skill.

Dispute Resolution: Class Action (Defence) respondent
Chambers Canada Guide

Catherine Beagan Flood is often the smartest person in the room by a long shot. She's professional and polished.

Dispute Resolution: Class Action (Defence) respondent
Chambers Canada Guide

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