Ian John is an antitrust and competition partner in the New York office of Kirkland & Ellis LLP. He advises clients and represents them before the antitrust enforcement authorities on matters relating to mergers and acquisitions and joint ventures, including complex cross-border transactions. He has represented clients from a diverse range of industries, including aerospace, beef processing, beer, building material, chemicals, computer hardware and software, consumer goods, defense, fertilizer, financial products, food and beverage, hospitality, insurance, life sciences, managed care, media and telecommunications, natural gas and oil exploration and transportation, retail, satellites, semiconductors, skilled nursing facilities, and transportation. Ian John is noted by clients as "an incredibly responsive and practical counselor." Ian has appeared before the U.S. Department of Justice, the Federal Trade Commission, the U.S. Department of Defense, state antitrust authorities, the Canadian Bureau of Competition and the European Commission, representing a number of major corporations in connection with antitrust investigations of merger and acquisition transactions, both consensual and contested.

Ian also has experience in litigated matters, such as participating in the representation of Anheuser-Busch InBev and Express Scripts in separate merger-related litigation matters, and advising four universities, each of which was then a member of the Big East Conference, in connection with the move of several schools to the Atlantic Coast Conference.

In addition, Ian advises clients on other antitrust matters, including issues related to trade associations, product distribution and pricing. He also works with clients to design and implement antitrust compliance programs.

Ian is a member of the board of directors at Row New York. Through the discipline of rowing and rigorous academic support, Row New York transforms the lives of underserved, mostly middle and high school aged, New Yorkers, regardless of background or ability.



Ranked in Chambers USA, America’s Leading Lawyers for Business for Antitrust, 2019–2024, and listed as a Recognized Practitioner for Antitrust, 2018

Ranked as a "leading lawyer" for Competition by Who's Who Legal, 2022–2023

Recognized as “Recommended” in New York by Global Competition Review 100, 2022 

Recognized in Euromoney’s Expert Guide to the World’s Leading Competition & Antitrust Experts, 2018, 2021

Recognized in The Legal 500 U.S., 2015, 2017–2024

Selected to Super Lawyers: 2011–2012, 2014–2020, 2023

Memberships & Affiliations

Life Fellow, American Bar Foundation. Membership in the Fellows is limited to one percent of lawyers licensed to practice in each jurisdiction.

Member of the Board of Directors, Row New York


Admissions & Qualifications

  • New York


  • Indiana University Maurer School of LawJ.D.magna cum laude1995
    Order of the Coif
  • Bowdoin CollegeB.A.1990