Ivor Cary Armistead, III

Retired Partner

  • JD, cum laude, Columbia University School of Law, 1970; Harlan Fiske Stone Scholar
  • BA (Economics), Michigan State University, 1967


  • Massachusetts, 1979
  • District of Columbia, 1970

Court Admissions

  • U.S. Court of Appeals for the First Circuit
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U.S. District Court for the District of Columbia
  • U.S. District Court for the District of Massachusetts
  • Supreme Court of the United States
  • American Bar Association, Antitrust Section
  • Boston Bar Association Antitrust Committee
  • The Best Lawyers in America (2006-2013)
  • Massachusetts Super Lawyers (2004-2014)
  • Chambers USA: America's Leading Lawyers for Business (2004-2012)
  • Lawdragon 3000: Leading Lawyers in America (2006)

Ivor Cary Armistead, III

Retired Partner

Prior to his retirement, Cary counseled domestic and multinational business entities regarding the antitrust laws of the United States and the competition laws of the European Union and other nations, with a particular focus on merger control issues arising from acquisitions, mergers and investments by operating companies and private equity funds. In addition, Cary counseled the firm’s clients with regard to the antitrust, commercial and other issues arising from domestic and cross-border joint ventures, distribution of licensing agreements and other complex business arrangements. 

Cary joined the firm in 1996 as a partner and served as former Chairman of the corporate department. He was also co-head of the Antitrust Practice Group and the International Practice Group. Cary began his career as a Trial Attorney with the Antitrust Division of the United States Department of Justice. He practiced with firms in Washington, D.C., and Boston. Just prior to joining the firm, Cary was a Vice President and Assistant General Counsel of Digital Equipment Corporation.


Cary has provided antitrust and merger control advice to a broad array of private equity sponsor clients, including Bain Capital, Silverlake, TH Lee Partners, Berkshire Partners, as well as corporate clients spanning a spectrum of industries including, Brooks Automation, Microvision, NSTAR, and The Timberland Company.

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