Dan Storino is a partner in Mayer Brown’s Litigation and Dispute Resolution group whose practice focuses on antitrust, health care, and complex commercial litigation matters. He represents clients across the country in state and federal trials, arbitration and mediation proceedings, and civil and criminal investigations.

Dan’s antitrust practice spans a variety of products and industries including health care, industrial chemicals, agricultural products, fertilizers, oil and gas, and the hospitality industry. He has extensive experience representing domestic and multinational corporations, health insurers, and health care organizations in cases alleging monopolization, price-fixing, tying, resale price maintenance, market allocation, and exclusive dealing. Dan also counsels clients on antitrust compliance and other business practices.

In addition to his antitrust work, Dan advises and represents health insurers and hospital systems in commercial disputes, contract negotiations, and other litigation matters. In 2018, the Chicago Daily Law Bulletin named Dan to its “40 Under 40” list and praised his “reputation as one of the city’s top antitrust and health care litigators.”

Furthermore, Dan regularly represents domestic and multinational corporations in complex commercial litigation matters involving breach of contract, joint venture disputes, trademark infringement, tortious interference, non-competition agreements, and exclusivity agreements.

Prior to joining Mayer Brown, Dan served as a judicial law clerk for the Honorable Susan H. Black of the U.S. Court of Appeals for the Eleventh Circuit.

Spoken Languages

  • English


  • Represented one of the largest health insurance companies in the United States in several major litigations and arbitrations.
  • Represented health plan and managed care company in federal antitrust litigation alleging monopolization, attempted monopolization, and exclusive dealing.
  • Defended one of the world’s largest chemical manufacturers in criminal and civil antitrust cases alleging price-fixing, market allocation, and attempted monopolization.
  • Represented a major hospital system in tax-exemption proceedings and related litigation.
  • Defended an international hotel company in a multi-district antitrust litigation alleging resale price maintenance.
  • Defended an international manufacturer of fertilizer and agricultural products in a multi-district antitrust litigation alleging a global price-fixing conspiracy.
  • Defended an international energy company in a price-gouging investigation conducted by the Illinois Attorney General’s Office.
  • Represented a global investment firm in a joint venture dispute and obtained a judgment worth more than $150 million for the client.
  • Represented a major software company in a multimillion dollar trademark litigation.
  • Obtained a $60 million judgment for an international bank in a dispute involving a swaps and derivatives agreement.
  • Represented three affiliates of the Sprint Corporation in multiple cases involving their exclusivity rights.


University of Notre Dame Law School, JD, magna cum laude
Article Editor, Notre Dame Law Review; Dean's List

University of Notre Dame, BA, summa cum laude
Dean's List; Phi Beta Kappa


  • Illinois


  • US District Court for the Northern District of Illinois
  • US Court of Appeals for the Eleventh Circuit