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  • J.D., Columbia University, 2005, Harlan Fiske Stone Scholar, Executive Editor, Columbia Journal of Environmental Law, Board Member, Columbia Environmental Law Society
  • B.A., University of California, Los Angeles, 2002
  • California
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. District Court for the Central District of California
  • U.S. District Court for the Eastern District of California
  • U.S. District Court for the Northern District of California
Publications & News

Leo Caseria is a partner in the Antitrust & Competition Practice Group in the Los Angeles office of Sheppard Mullin. 

Areas of Practice

Mr. Caseria’s practice focuses on antitrust and competition matters.  He advises companies on antitrust issues relating to a broad spectrum of business activities.  He has represented global companies in connection with antitrust and competition matters relating to standard setting and intellectual property.  He has analyzed competition issues in many different industries, including consumer electronics and automotive parts.  

Mr. Caseria’s litigation experience includes defending companies against allegations of price-fixing or participation in other types of anticompetitive conspiracies.  He also defends companies against allegations of monopolization or exclusionary conduct.  He frequently defends companies in a class action or multidistrict litigation context.  He has authored articles and counseled on the inclusion of class action waivers in arbitration agreements.  Mr. Caseria has also represented plaintiffs in competition cases and advised clients that are considering bringing competition claims.  His litigation experience also includes disputes involving unfair competition, business interference and trade secrets.  

In addition to antitrust counseling and litigation, Mr. Caseria has also represented clients involved in antitrust investigations by government agencies.  His experience includes both civil and criminal government antitrust investigations.  Many of the matters Mr. Caseria has worked on are international in scope.  

Mr. Caseria is active in the American Bar Association's Section of Antitrust Law, where he is currently Vice Chair of the Section’s Books and Treatises Committee. Mr. Caseria has contributed to Section handbooks, newsletters, and other publications, and has also authored articles for SCOTUSblog and the New York Law Journal.

  • Antitrust, Legal 500, 2015

Representative Engagements

  • Representing Samsung SDI against price-fixing claims involving cathode ray tubes (CRT). In re Cathode Ray Tube (CRT) Antitrust Litig., MDL. No. 1917 (N.D. Cal.)

  • Representing Samsung SDI against multi-billion dollar price-fixing claim brought by Motorola. Claims dismissed just before trial. Motorola Mobility LLC v. AU Optronics Corporation, 09-cv-6610 (N.D. Ill.)

  • Representing Samsung SDI against price-fixing claims involving thin film transistor liquid crystal display products. In re TFT-LCD (FLAT PANEL) Antitrust Litigation, MDL. No 1827 (N.D. Cal.)

  • Representing Samsung Electronics in global patent and standards related antitrust governmental proceedings.

  • Represented Diamond Electric in international price-fixing investigation in the automotive sector.

  • Represented Samsung Electronics against multi-billion dollar group boycott claim brought by Rambus under California’s Cartwright Act concerning a certain type of DRAM. Rambus Inc. v. Micron Technology Inc., 04-0431105 (San Francisco Superior Court)

  • Represented Samsung against federal and state antitrust claims brought by direct and indirect purchasers of SRAM alleging horizontal conspiracy to exchange information for the purpose of fixing prices. In re SRAM Antitrust Litigation, MDL No. 1819 (N.D. Cal.)

  • Represented Live Nation and Clear Channel against Sherman Act § 2 monopolization claims brought by a purported class of purchasers of rock concert tickets. In re Live Concert Antitrust Litigation, MDL No. 1745 (C.D. Cal.)

  • Represented Philip Morris against Sherman Act § 1 challenge to the $246 billion dollar Master Settlement Agreement between leading tobacco companies and 46 states. Contributed to successful U.S. Supreme Court brief in opposition to petition for certiorari following favorable ruling by the Ninth Circuit Court of Appeals in Sanders v. Brown, 540 F.3d 903 (9th Cir. 2007).


Antitrust Law Blog Posts

Other Publications

  • Editor, ABA Section of Antitrust Law, Handbook on the Scope of Antitrust, 2015
  • Editor, ABA Section of Antitrust Law, Handbook on Sports and Antitrust Law, 2014
  • Contributor, ABA Section of Antitrust Law, Joint Conduct Committee E-Bulletin, Spring 2013
  • Contributor, ABA Section of Antitrust Law, 2012 Annual Review of Antitrust Law Developments, 2013
  • Senior Editor, ABA Section of Antitrust Law, Handbook on Multijurisdictional Competition Law Investigations, 2010
  • State Bar of California, Antitrust and Unfair Competition Law Section
  • Vice-Chair, Books and Treatises Committee of the ABA Section of Antitrust Law