Cat Rizzoni is an associate in the San Francisco office of Latham & Watkins and a member of the firm's Litigation & Trial Department. She represents clients across a variety of industries in both complex commercial litigation and white collar defense and investigations matters.

Ms. Rizzoni represents public and private technology, life sciences, and automotive companies in civil complex commercial and class action litigation. She has experience taking and defending depositions, preparing witnesses to testify, leading dispositive motion drafting, and managing discovery.

Ms. Rizzoni also represents clients, including corporations, individuals, and boards of directors, in high-stakes internal and government investigations initiated by federal and state enforcement agencies. These investigations have covered a broad range of issues including potential violations of federal healthcare and anticorruption law, as well as corporate culture-related issues.

Ms. Rizzoni maintains an active pro bono practice, representing clients in civil rights litigation and asylum proceedings.

Ms. Rizzoni earned her JD from the University of Virginia, where she served as senior articles editor of the Virginia Law & Business Review and a Dillard teaching fellow for Legal Research & Writing. She also served as a judicial extern to Chief Magistrate Judge Joseph C. Spero of the Northern District of California.

Ms. Rizzoni’s experience includes the following notable matters representing:


  • One of the world’s largest social media companies in a putative class action consumer protection lawsuit related to its advertising tools
  • craigslist in multiple lawsuits related to the scope of the Communications Decency Act Section 230 immunity
  • Codexis in a trademark infringement lawsuit
  • A German automaker in a securities class action related to diesel car emissions
  • A major hospital chain in a qui tam False Claims Act lawsuit
  • A transgender inmate against a state corrections department for constitutional violations related to housing
  • A veteran in an Americans with Disabilities Act and civil rights lawsuit against a police department
  • An asylum applicant in proceedings before the immigration court


  • Board committee of a private technology company related to the company’s culture following its CEO’s departure
  • Individual employee of a publicly traded technology company in an FCPA investigation
  • Publicly traded pharmaceutical company in multiple investigations initiated by federal and state enforcement agencies
  • Hospital chain in an investigation initiated by the DOJ for potential healthcare fraud
  • Private life sciences firm in whistleblower investigation regarding its sales practices

Bar Qualification

  • California


  • JD, University of Virginia School of Law, 2018
  • BA in International Studies & French, Johns Hopkins University, 2012