Nicole L. Castle provides legal counsel on complex civil and criminal antitrust litigation. She regularly represents clients in complex, multidistrict class action antitrust litigation alleging Sherman Act violations. She also defends mergers and acquisitions before the US Department of Justice (DOJ) and Federal Trade Commission (FTC). Nicole counsels clients on strategies for addressing cartel prosecutions and defenses, from the inception of government investigations to the initiation of civil class action litigation.

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  • Defended Mars, Incorporated in a multi-district class action price-fixing litigation, winning summary judgment for Mars, Incorporated (In re Chocolate Confectionary Antitrust Litigation)
  • Defended Stora Enso North America in a multi-district class action price-fixing litigation and in a criminal trial against the Department of Justice. After a five-day trial, the jury returned a verdict of not guilty

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  • The Legal 500 US 2017
  • Washington, DC, Super Lawyers, Rising Star, 2014 to 2016
  • Benchmark Litigation 40 & Under Hot List 2018 and 2019


  • American Bar Association, serves as an editor for the Antitrust Section’s Health Care and Pharmaceuticals Committee’s quarterly publication, the Antitrust Health Care Chronicle


Georgetown University Law Center, JD, cum laude, 2006
College of William and Mary, BA, magna cum laude, 2003

District of Columbia
New York

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Nicole L. Castle

Insights & Events / Media

GCR Insight / October 2019