Danielle R.Leneck


Los Angeles +

Danielle Leneck's practice focuses on complex business litigation in state and federal courts, representing clients in matters involving antitrust litigation, U.S. securities and financial institutions, business torts, and commercial law disputes. She has experience in various aspects of litigation, including factual investigation, offensive and defensive discovery including taking depositions and witness preparation, motions practice, and trial. The clients she has represented have operated in a wide variety of business sectors and industries, including financial services and investment banking, oil and gasoline refining and marketing, health care, aviation, internet governance, publishing, and telecommunications.

Danielle's recent matters include a full and unanimous defense verdict for Sutter Health in a month-long antitrust class action trial alleging Sutter restrained competition by forcing insurers to include certain hospitals in their provider networks and preventing them from steering patients to other hospitals; defending a gasoline refiner in two price-fixing and output restriction class actions; and defending a Japanese capacitor manufacturer against an add-on price-fixing class action litigation following a Department of Justice (DOJ) guilty plea. Danielle's experience also includes defending a telecommunications company and its corporate partners against allegations that a joint venture offered secret, below-cost discounts to advertisers.

Danielle is actively involved in her local community. She maintains a devoted pro bono practice that focuses on representing clients seeking political asylum. In addition, she serves on the Diversity, Inclusion and Advancement Committee in the Los Angeles Office and represents Jones Day as its sitting member on both the Young Leaders Division of the Association of Business Trial Lawyers and the New Leadership Council of Bet Tzedek.


  • Sutter Health wins complete defense verdict in landmark antitrust class actionJones Day won a complete defense jury verdict for Sutter Health in a landmark antitrust class action seeking $1.2 billion in treble damages.