Jennifer Sun

Jennifer Sun

Associate (she/her)

jsun@classlawgroup.com
510-929-4271
vCard

Jennifer represents plaintiffs in class actions and complex litigation at the intersection of consumer protection and data security and privacy. Her work focuses on holding companies to account when they fail to safeguard personal information or profit from the misuse of consumers’ data.

Jennifer specializes in navigating technically complex matters brought against the world’s largest technology companies. She has taken and supported the depositions of engineering, security, and compliance executives, managed expert discovery, and litigated numerous discovery disputes. Most recently, she helped achieve a $45 million settlement against a large entertainment and hospitality corporation on behalf of millions of consumers whose sensitive personal information were exposed in multiple data breaches.

Jennifer graduated from the University of California, Berkeley, School of Law with a certificate in Law & Technology. While in law school, she externed for the Knight First Amendment Institute at Columbia University and the Electronic Frontier Foundation. She also researched the regulation of digital economies with Professors Pamela Samuelson and Tejas Narechania and advocated for the public’s right of access to electronic-surveillance warrant information as a member of the Samuelson Law, Technology & Public Policy Clinic. Jennifer served on the boards of the Asian American Law Journal and the Asian Pacific American Law Students Association.

In a prior life, Jennifer was a product manager at Dotdash Meredith and The Atlantic, where she worked closely with executives, business partners, and engineers on the publishers’ programmatic advertising and revenue products. She received a B.S. Economics from The Wharton School at the University of Pennsylvania, where she served as President and Executive Editor of The Daily Pennsylvanian.

admissions
  • California
education+
  • J.D., University of California, Berkeley, School of Law, 2023
  • B.A., University of Pennsylvania, 2014
memberships+
  • American Association for Justice
  • Asian American Bar Association
  • Federal Bar Association

Litigation Highlights

Smallman v. MGM Resorts International

Jennifer helped achieve a $45 million settlement from MGM after data breaches in 2019 and 2023, in which the personal data of over 100 million customers was stolen and posted on underground hacking forums. The settlement received final approval on June 18, 2025.

Flock Safety Litigation

Jennifer represents drivers in a putative class action lawsuit against Flock Safety and its use of automated license plate cameras. Plaintiffs allege Flock Safety shares millions of Californians’ daily movements with law enforcement agencies in violation of California privacy laws.

Change Healthcare Data Breach Litigation

After the largest healthcare data breach in US history that disrupted healthcare systems nationwide and affected an estimated 193 million people in 2024, Jennifer represents a putative class of medical providers who lost money and were harmed by the cyberattack.

In re Equifax, Inc. Fair Credit Reporting Act Litigation

Jennifer represents over 2.5 million consumers in litigation against Equifax, one of the Big Three credit reporting agencies, for allegedly misreporting their credit scores of when they applied for mortgages, loans, and credit cards between March 17 and April 6, 2022.

In re Prosper Health Data Breach Litigation

Jennifer represents millions of consumers against Prosper Funding LLC, a peer-to-peer loan and financial company, for its failure to protect their sensitive personal information from a data breach that involved their Social Security numbers and bank account information.

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