A partner in Lieff Cabraser’s San Francisco office, Mike Sheen has a practice focused on digital privacy, consumer protection, and securities and financial fraud.

Mike’s work in digital privacy litigation is varied, including representation of parents and children in a series of class action litigation (and a similar suit brought on behalf of the State of New Mexico) against children’s online game developers and ad networks including Disney, Viacom, and the makers of the popular Subway Surfers game (Kiloo and Sybo), over allegations the companies unlawfully collected, used, and disseminated the personal information of children who played the gaming apps on mobile devices. The cases culminated in over a dozen settlements that provide stringent and meaningful privacy protections to ensure defendants’ proactively protect children’s privacy, which the New York Times has observed “could reshape the entire children’s app market.”

Mike also assisted in Lieff Cabraser’s litigation against financial tech company Plaid Inc., which alleged that Plaid’s bank authentication services, used with several well-known payment apps such as Venmo and Cash App, unlawfully invaded consumers’ privacy by improperly taking their banking data without their consent or knowledge. That case culminated in a $58 million settlement that included injunctive relief to stop the conduct and purge all improperly obtained data.

More recently, Mike has been involved in the firm’s work against Google for its collection and tracking of user location information, despite users’ decision to disable a feature (Location History) that was supposed to prevent such tracking. That case has resulted in a proposed settlement for a $62 million and valuable injunctive relief, which is awaiting final approval by the court later this year. Separately, Mike currently represents consumers of various video streaming websites in cases alleging that those websites secretly, and without users’ consent, collected personal information through tracking software developed by Meta (known as the “Pixel”) in violation of the Video Privacy Protection Act.

Mike received his J.D. from the University of California, Berkeley School of Law in 2012. In law school, Mike served on the editorial boards for the Berkeley Technology Law Journal and the Asian American Law Journal. Prior to joining Lieff Cabraser, he clerked for Judge Dale A. Drozd of the United States District Court for the Eastern District of California.

Long form bio (click to open pdf).