Peter McCormack is an Antitrust & Competition partner in Kirkland's New York office. Peter advises a variety of public company and private equity clients on all aspects of antitrust matters relating to mergers and acquisitions, joint ventures and other business combinations, and has over a decade of experience representing clients on antitrust transactional matters and other critical business issues investigated by the federal, state and international antitrust and competition authorities. He regularly appears before the Antitrust Division of the U.S. Department of Justice, the Federal Trade Commission and state attorneys general in connection with merger reviews and civil antitrust investigations, and counsels clients in both domestic and cross-border transactions on issues relating to antitrust filings, substantive risk and strategy. Peter also has experience representing clients in private antitrust litigation, including substantial antitrust pre-trial, trial and arbitration experience prior to his concentration on antitrust merger matters.


Thought Leadership


Co-author, “Populist Instincts: A Trump Administration Antitrust Merger Retrospective,” Antitrust Magazine, Volume 35 No. 3 (Summer 2021)

Co-author, “Prepare For Antitrust Scrutiny Of PIPEs, Partial Acquisitions,” Law360 (June 29, 2020)

Author, “INSIGHT: Planning for Government Antitrust Merger Litigation During and After the Pandemic,” Bloomberg Law (April 17, 2020)


Recognized in Global Competition Review’s GCR 100 (New York), 2021–2022 

Recognized in The Legal 500 U.S. — Antitrust: Merger Control, 2018–2020


Admissions & Qualifications

  • 2011New York


  • English
  • Spanish


  • Albany Law SchoolJ.D.summa cum laude2010

    Managing Editor, Albany Law Review

  • Villanova UniversityB.A., History & Spanish; Business Minorcum laude2007