Jonathan Moss is a partner in the Business Trial Practice Group in the firm's Los Angeles office. He is also a member of the firm's Energy, Private Equity and Hospitality Industry Teams.

Areas of Practice

Jonathan focuses on commercial and business litigation. His practice entails matters in state and federal court, including complex business disputes, class action defense, securities litigation, shareholder derivative cases, corporate buy-out and dissolution proceedings, entertainment litigation, real estate disputes, and defending allegations of breach of fiduciary duty and fraud.

Jonathan is experienced in all aspects of the litigation process and in handling alternative dispute resolution proceedings to successful conclusion. 

Jonathan also has significant appellate experience, including briefing and arguing cases before the California Court of Appeal, the Ninth Circuit Court of Appeals, and the United States Supreme Court.

Jonathan is a committed pro bono attorney. He regularly represents parents in adoption proceedings through Public Counsel, having handled eight separate adoption cases as well as advocacy to government authorities on behalf of the adopting parents.



Mr. Moss' experience includes:

  • Won complete dismissal on behalf of American Apparel’s former directors of lawsuit filed by former CEO Dov Charney.

  • Represented multiple private equity firms in successfully prosecuting breach of contract lawsuits.
  • Represented private equity firm and managing principals in successfully resolving lawsuit alleging breaches of fiduciary duty and contract.
  • Represented film production company in successfully resolving breach of contract action at early stage.
  • Represented Amgen Inc. and its officers and directors in multiple shareholder derivative lawsuits.
  • Obtained complete dismissal at the pleadings stage of lawsuit against former directors of Electro Rent Corp.
  • Prepared summary judgment motion that resulted in judgment in favor of client insurance company in excess of $155 million.
  • Represented closely held company in the municipal finance and public procurement business in a California Corporations Code section 2000 dissolution and buy-out action.
  • Won summary judgment in favor of a Los Angeles real estate developer in breach of contract action involving alleged failure to pay real estate commission.
  • Represented closely held company in retail industry in California Corporations Code section 2000 dissolution action, from inception of proceeding through appraisal and buy-out.
  • Represented Southern California Gas Company and Sempra Energy in all lawsuits related to the Sesnon fire.
  • Obtained complete dismissal at the pleadings stage of lawsuit against Ernst & Young involving allegations of professional negligence and negligent misrepresentation.
  • Represented Amgen in nationwide securities class action, including briefing in the Ninth Circuit Court of Appeals and United States Supreme Court.
  • Prepared brief of Pharmaceutical Research and Manufacturers of America (PhRMA) as Amicus Curiae in case before the United State Supreme Court.
  • Obtained a favorable result for Northrop Grumman in a products liability case involving the crash of a military jet aircraft.
  • Obtained complete dismissal at the pleadings stage of breach of contract lawsuit against Home Depot.
  • Prepared motion to dismiss consumer class action against General Electric involving SmartMeter device, which resulted in complete dismissal for lack of jurisdiction.
  • Represented Disney in breach of contract and copyright infringement lawsuit involving Disney's sale of movies on iTunes.

Published Appellate Decisions

  • Southern California Gas Company v. Flannery, 2016 Cal. App. LEXIS 976 (Cal. App. 2d Dist. Nov. 14, 2016) (handled oral argument)
  • Southern California Gas Company v. Flannery, 232 Cal. App. 4th 477 (2014) (handled oral argument)

Unpublished Appellate Decisions

  • Khan Development Co.; Inc. v. Bral, 2014 Cal. App. Unpub. LEXIS 5113 (July 21, 2014)



Class Action Defense Strategy and Corporate & Securities Law Blog Posts

Corporate &Securities Law Blog Posts

Media Mentions

Speaking Engagements

  • "Fraud-on-the-Market: Recent Developments in Securities Class Actions," CalCPA, Litigation Section, May 2011



California State Bar, Litigation Section

Cornell Hotel Society

Anti-Defamation League: Board Member, Pacific Southwest Region and Glass Leadership Institute


J.D., University of Southern California, 2007

B.S., Cornell University, 2004


  • U.S. Supreme Court
  • Ninth Circuit
  • District Court for the Central and Northern Districts of California
  • California
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