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:

  • defending a major soft drink manufacturer and distributor in an alleged breach of contract action;
  • representing multiple entities and individuals in the subsea cable industry in multijurisdictional litigation involving a variety of tort and contract claims;
  • defending a major health insurance company in a putative class action arising out of an alleged data breach;
  • representing a charitable organization in a probate action seeking to invalidate a large bequest to the charity;
  • defending an online beauty retailer in a putative federal securities class action arising out of a take-private transaction;
  • representing a major health insurance company in a federal securities class action and follow-on derivative action arising out of a corporate merger;
  • defending a major U.S. energy company in a putative shareholder class action alleging fraud and breach of contract;
  • representing an indirect auto finance company in an antitrust suit involving claims of monopolization and attempted monopolization;
  • defending accounting firms in multiple actions involving claims arising out of alleged tax shelter activities; and
  • representing a pharmaceutical company 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’ 2023 Ones to Watch.




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


  • California

Zachary Faigen