Robert M. Buchanan, Jr.

Bob Buchanan, leader of the Antitrust practice at Choate, helps sophisticated clients to understand and comply with the nation’s antitrust laws. His strategic perspective also helps the firm’s transaction clients to effectively address Hart-Scott-Rodino issues in connection with their merger and acquisition activities. Bob provides vertically integrated antitrust service based on years of experience – allowing clients to gain high level, relevant advice on pre-merger notification, merger process, counseling, and litigation risks all in one conversation.

Bob chairs Choate's Ethics Committee and is the firm’s General Counsel.


  • The National Law Journal, “Antitrust Trailblazer”
  • Best Lawyers 2019 Boston “Lawyer of the Year” for Antitrust Law
  • Chambers USA, Band 1 for Antitrust Litigation and Counseling (2003-2024)
  • Best Lawyers in America (2006-2024)
  • The Legal 500 (2008-2022)
  • Massachusetts Super Lawyers
  • Business Today “Top 10 Massachusetts Antitrust Lawyers Shaping Future Of Competition In 2023”

Representative Engagements

  • Selected as joint antitrust counsel for three leading companies as they form a forward-thinking joint venture.
  • Brought in to provide antitrust counseling to the senior leadership and legal department of a progressive company that faces various strategic discussions.
  • Won summary judgment on behalf of Samsung in consumer class action filed in federal court.
  • Wrote legal standard adopted by Supreme Judicial Court of Massachusetts on important issue of attorney-client privilege, after being recruited by Boston Bar Association to write amicus brief.
  • Selected by two of top three health plans in Massachusetts as their joint antitrust counsel advising merger discussions.
  • Won judgment in favor of Fortune 50 company by successful motion to dismiss complaint in antitrust class action.

Publications and Presentations

Professional and Community Involvement

  • Principal author of an important Opinion by the BBA Ethics Committee, which supports the BBA's pro bono initiative to help needy individuals with bankruptcy filings.
  • Past chair of the Boston Bar Association’s Ethics and Antitrust Committees, and a past member of the Nominating Committee.

Education & Credentials

Harvard Law School
JD, 1985, cum laude
Harvard University
AB, 1982, magna cum laude, Phi Beta Kappa



U.S. Courts of Appeals, First & Eleventh Circuits

U.S. District Courts, Massachusetts & Eastern District of Michigan


Honorable Samuel Conti
U.S. District Court, Northern District of California

Robert's Insights