Henry C. Quillen

HenryQuillen This email address is being protected from spambots. You need JavaScript enabled to view it.

Portsmouth Office
603-294-1591 | vCard



Henry Quillen has experience litigating antitrust and healthcare matters in courts and arbitration panels around the country. In 2016, he was one of seven attorneys nationwide to be named “Rising Stars” in competition law by Law360. In the federal district courts, Mr. Quillen has taken an active role in all stages of litigation, from filing the complaint to trial and post-trial motions. He has also authored several briefs in the United States Courts of Appeals and the United States Supreme Court.

Before joining WhatleyKallas, Mr. Quillen was an associate in the litigation department of Sullivan & Cromwell LLP, where he focused on complex commercial litigation. He also served as a law clerk to the Honorable A. Raymond Randolph of the United States Court of Appeals for the District of Columbia Circuit, as well as the Honorable Jeffrey Howard of the United States Court of Appeals for the First Circuit.

Mr. Quillen graduated from Harvard College magna cum laude (A.B., Biochemical Sciences, 2000) and Yale Law School (J.D., 2007). He also received a Master in Public Administration from Kennedy School of Government (2007). He is a member of the American Bar Association and admitted to practice in New York, New Hampshire, the District of Columbia, the United States District Court for the District of Colorado, District of Columbia, and District of New Hampshire, the United States Court of Appeals for the First, Tenth, Eleventh, and District of Columbia Circuits and the United States Supreme Court.