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Colin A. Mark



Colin Mark maintains a wide-ranging commercial litigation practice with particular experience in securities, bankruptcy, and fintech-related matters. He graduated from Harvard College and Harvard Law School, where he served as an editor of the Harvard Negotiation Law Review and an officer of the Harvard Law School Negotiators. His commercial litigation practice is informed by his experience as a clerk in the U.S. District Court for the Eastern District of New York.

While in law school, Colin served as a research analyst with Outpost Capital Partners, analyzing litigation-related investment opportunities. He also served as a research assistant to professors Christine Desan, Howell Jackson, and Todd Rakoff, and interned with the U.S. Securities and Exchange Commission. Previously, as a senior analyst working under the direction and supervision of attorneys at an Am Law 200 law firm, he performed legal research and conducted factual investigations of civil and criminal cases across the U.S., Europe, and Asia.

Notable Cases

Notable Cases

  • Various affiliates of Chubb in nationwide litigation with manufacturers and distributors of opioids, and national pharmacy chains that sold opioids, over insurance coverage for over 3,000 lawsuits brought by governmental entities across the country. HSG is national trial counsel to Chubb in opioid coverage litigation.

News and Writings


  • May the Executive Branch Forgive Student Loan Debt Without Further Congressional Action?, 42 J. National Association Administrative Law Judiciary 97 (2022)
  • Executive Authority to Forgive Student Loans Is Not So Simple, The Regulatory Review (Apr. 19, 2021) (co-author)
Photo of Colin A. Mark


  • Hon. Eric R. Komitee, United States District Court, Eastern District of New York (2023 – 2024) 


Harvard Law School (J.D., magna cum laude, 2022; Technical Editor, Harvard Negotiation Law Review; Dean’s Scholar Prizes)

Harvard College (A.B., cum laude, 2017)

Bar and Court Admissions

  • New York
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