Aaron Blumenthal

ab@classlawgroup.com (510) 350-9714 vCard

Aaron Blumenthal represents employees, whistleblowers, and consumers in complex and class action litigation. He is a member of our California whistleblower attorney practice group.

Aaron attended law school at the University of California at Berkeley, where he graduated Order of the Coif, the highest level of distinction. While in law school, Aaron wrote an article about class action waivers that was published by the California Law Review, one of the top law reviews in the country.

Aaron served as a research assistant to Professor Franklin Zimring, who described Aaron in the acknowledgements section of one of his books as a “statistical jack-of-all-trades.”

Representation of Consumers, Whistleblowers, & Employees

Aaron represented consumers whose personal information was impacted by the Anthem data breach, which was announced in 2015 as affecting nearly 80 million insurance customers. The case resulted in a $115 million settlement, which offered extended credit monitoring to affected consumers.

Aaron represents video advertisers in a putative class action against Facebook alleging that the company inflated its metrics for the average time users spent watching video ads, causing the plaintiffs to spend more for video advertising on Facebook than they otherwise would have.

Aaron represents mortgage borrowers in a putative class action against Wells Fargo for improperly denying loan modifications and invalidly foreclosing due to a software error or related calculation errors by Wells Fargo.

Aaron represented a class of mortgage borrowers against JPMorgan Chase, alleging that the bank charged them invalid “post-payment interest” when they paid off their loans. The case resulted in an $11 million settlement.

Aaron represents a qui tam whistleblower in a matter that is currently under seal.

Aaron represents a putative class of former employees of Neilson Financial Services, who allege that they were laid off in violation of the California WARN Act.

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Rising Star, Northern California Super Lawyers, 2018-2022
  • J.D., University of California at Berkeley (Berkeley Law), 2015
  • B.A., Phi Beta Kappa, University of California at Berkeley, 2008

Impact of the Viking River Cruises Ruling on PAGA and Mass Arbitrations

Simpluris Podcast

October 24, 2022

Why Justices' PAGA Ruling May Not Be Real Win For Cos.

Law360 Employment Authority

July 12, 2022

Co-author, DoorDash: Quick Food, Slow Justice

Daily Journal

March 24, 2020

In the Breach (co-author)

Trial Magazine, American Association for Justice

September 2017

Winning Strategies in Privacy and Data Security Class Actions: the Plaintiffs’ Perspective

Berkeley Center for Law & Technology

January 10, 2017

Circumventing Concepcion: Conceptualizing Innovative Strategies to Ensure the Enforcement of Consumer Protection Laws in the Age of the Inviolable Class Action Waiver

103 Calif. L. Review 699


Religiosity and Same-Sex Marriage in the United States and Europe

32 Berkeley J. Int'l. L 195