Current Role
  • Partner, Hagens Berman Sobol Shapiro LLP
  • Practice focuses on securities and antitrust matters, as well as nationwide consumer protection cases involving large corporations
  • Extensive experience working with expert witnesses, often in economic and other highly technical areas
  • Litigation Associate at Am Law 10 Law Firm, New York, New York
  • Articling Student at “Seven Sister” Law Firm, Toronto, Canada
  • Best Lawyers, Consumer Protection Law,  Mass Tort Litigation / Class Actions - Plaintiffs, 2024
  • Rising Star, Washington Super Lawyers, 2016-2023
  • National Trial Lawyers Top 40 Under 40 in Washington State, Civil Plaintiff, 2022
  • Co-author, the American Bar Association’s “A Practitioner’s Guide to Class Actions — Vermont Chapter," 2017
  • “Designing a New Playbook for the New Paradigm: Global Securities Litigation and Regulation,” Harvard Law School Forum on Corporate Governance and Financial Regulation, 2011
  • “Legal Vulnerability of Bioethicists in Canada: Is a New Era Upon Us?” 30 Health Law in Canada 132, 2010
  • Catherine Y.N. Gannon and Stephanie Ben-Ishai, “The Threat of the Oppression Remedy to Reorganizing Insolvent Corporations,” Annual Review of Insolvency Law 429, 2009
Personal Insight

Ms. Gannon previously worked at leading law firms in both New York City and Toronto prior to joining Hagens Berman in Seattle. Outside of work, Ms. Gannon serves on the board of directors for the Eastside Legal Assistance Program, which provides pro bono civil legal services in the greater Seattle area. She has also volunteered with organizations such as Legal Voice, Disability Rights Washington, Advocates for Children of New York and The Innocence Project. A seasoned backpacker, Ms. Gannon once spent six months traveling to more than a dozen countries across five continents. She is fluent in French and can still pack a suitcase in less than 5 minutes.