Zachary Faigen

Zachary Faigen

Counsel, Litigation; Artificial Intelligence
Zack Faigen practices complex civil litigation in state and federal court, representing clients in a wide range of cases, including securities and other class action litigation, shareholder derivative actions, antitrust lawsuits, contract disputes and fraud claims. 


Mr. Faigen has worked on numerous matters, including:

  • Tower Semiconductor Ltd. in a patent and trade secret dispute in connection with semiconductor patents
  • Keurig Dr. Pepper and American Bottling Co. in an alleged breach-of-contract action
  • RTI Infrastructure, RTI Solutions and several of its executives in multijurisdictional litigation involving a variety of tort and contract claims
  • Centene Corporation in a:
    • putative class action arising out of an alleged data breach
    • federal securities class action and follow-on derivative action arising out of a corporate merger
  • Credit Acceptance Corp. in an antitrust suit stemming from a patent dispute associated with computer programming and AI-related issues
  • a social media company in a case regarding audience targeting and machine-generated algorithms
  • Cheetah Mobile Inc., a China-based mobile and computer applications developer, in multiple federal securities actions arising out of alleged misstatements related to a business dispute involving Google mobile ads
  • The Conrad N. Hilton Foundation in a probate action seeking to invalidate a large bequest to the charity
  • Jumei International Holding Ltd. in a putative federal securities class action arising out of a take-private transaction
  • FirstEnergy Corp. in a putative shareholder class action alleging fraud and breach of contract
  • several “Big Four” accounting firms in multiple actions involving claims arising out of alleged tax shelter activities
  • Questcor Pharmaceuticals, Inc (now Mallinckrodt Pharmaceuticals) in a federal securities class action litigation

Mr. Faigen is committed to his pro bono practice, having represented clients in matters ranging from immigration defense to First Amendment challenges. He also is a member of the Los Angeles office’s Hiring Committee.

In recognition of his work, Mr. Faigen was named one of Best Lawyers’ 2024 Ones To Watch in America.



  • J.D., UCLA School Of Law, 2013 (Order of the Coif)
  • B.A., Princeton University, 2005


  • California


  • Board of Directors, Inner City Law Center
  • Co-Chair (Vice President), Board of Trustees, The Willows School (2019-present)

Zachary Faigen

Counsel, Litigation; Artificial Intelligence