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Sam Sullivan represents clients across a range of antitrust and competition matters, including complex civil litigation, government investigations, and filing obligations under the Hart-Scott-Rodino Act.

Sam received his J.D. from Columbia Law School, where he was a James Kent Scholar and articles editor on the Columbia Business Law Review. During law school, Sam served as an extern in the Antitrust Bureau of the New York State Attorney General’s Office.


Antitrust Developments Affecting the Semiconductor Industry
Arnold & Porter Webinar
DOJ Criminal Antitrust Settlements Involve Dollars, Donations, and Divestitures
Enforcement Edge: Shining Light on Government Enforcement
Arnold & Porter Advises JHT Holdings in Sale to TFI International
FTC Bureau of Competition Announces New Criminal Liaison Unit
Enforcement Edge: Shining Light on Government Enforcement



  • J.D., Columbia Law School, 2019, James Kent Scholar
  • B.A., Economics, English Literature, Northwestern University, 2015


  • New York