Gregory Mortenson

New York
  • 1271 Avenue of the Americas
  • New York, NY 10020
  • USA

Gregory Mortenson is an associate in the New York office of Latham & Watkins and a member of the firm’s Litigation & Trial Department. Mr. Mortenson has a diverse litigation practice, including securities, complex commercial, bankruptcy, and antitrust, on behalf of both plaintiffs and defendants. He has litigated in both federal and state courts at both the trial and appellate levels, and his experience encompasses pre-litigation through post-trial, as well as related government and internal investigations. 

Prior to joining the firm, Mr. Mortenson served as a judicial law clerk in the US District Court for the District of New Jersey. While clerking, he was the recipient of the Clarkson S. Fisher Historical Society Essay Award.

Mr. Mortenson attended the Seton Hall University School of Law on a full Presidential Merit Scholarship, and served as editor-in-chief of Volume 43 for the Seton Hall Law Review. He graduated magna cum laude and was conferred the Order of the Coif. Mr. Mortenson attended Georgetown University, where he received a bachelor’s degree in business administration.

Mr. Mortenson’s experience includes representing:

  • A global pharmaceutical company in complex securities litigation concerning generic drug pricing
  • A software company in parallel federal and state securities class actions, resulting in complete dismissal of both actions at the pleadings stage
  • Industry clients in appeal concerning novel question of standing relating to direct listings, as amicus
  • A global investment manager in a federal bench trial concerning the sale of disputed securities held in a CDO, resulting in a victory on all claims
  • A media/advertising company in a federal jury trial regarding employee non-disclosure and non-solicitation provisions, resulting in a favorable verdict for the client and also including dismissal of a follow-on state court action on grounds of res judicata
  • A global financial institution regarding alleged collusion in bond market, in internal investigation, government investigation, and multiple civil class actions, resulting in favorable settlements
  • A hedge fund accused of breaching CDO governing documents, resulting in dismissal of all claims at the pleadings stage
  • An energy company in a post-merger working capital dispute
  • A medical service provider in a securities class action and derivative action, resulting in a favorable settlement
  • An international fashion brand in a contractual dispute with a critical vendor
  • An international agricultural products company in a securities class action, resulting in a favorable settlement
  • A global alternative asset manager in litigation stemming from a PIPE transaction, resulting in a favorable settlement
  • A national consumer products brand in consumer fraud class action regarding deceptive labeling
  • A global alternative asset manager in connection with an internal investigation of one of its funds regarding potential securities law violations
  • A national retailer in connection with a FINRA inquiry
  • A former prisoner in a two-week federal jury trial alleging 8th Amendment violations, resulting in verdict in client’s favor
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