Mr. Colahan is seen by his clients as "a great organiser, who stands out for his extensive knowledge and ability to apply UK competition law to mergers." Legal 500 UK 2020

John D. Colahan

London | Brussels
  • 99 Bishopsgate
  • London EC2M 3XF
  • United Kingdom

John Colahan is based in Latham & Watkins' London office and divides his time with the Brussels office. He is a member of the Global Antitrust & Competition Practice, having previously been a Legal Advisor at the UK Cabinet Office and international competition law counsel at The Coca-Cola Company. John represents clients before the European Commission, national authorities in Europe and internationally, as well as conducting litigation in the European courts and numerous national courts. He has advised on a variety of international antitrust matters, including structuring and implementation of international mergers, acquisitions, and joint ventures; cartel enforcement; single firm conduct; and compliance counselling. As a Cabinet Office Legal Advisor to the European Secretariat, Mr. Colahan was responsible for policy coordination with the Treasury and other departments on financial services.    

Mr. Colahan regularly lectures on a range of international antitrust and compliance issues.

Mr. Colahan's past matters include:

  • Turbomeca/ Rolls Royce
  • P&O/Carnival with the related UK Competition Commission proceeding
  • Reebok/Adidas
  • MGM/Sony & others
  • Bayer/Schering
  • Aviva/HSBC/Hamilton (Insurance)
  • Unum/Swiss Life (third party)
  • Nestlé/A.S. Watson
  • Coca-Cola/Carlsberg (a joint venture in the Nordic countries)
  • Coca-Cola/Schweppes (global acquisition in over 100 countries)
  • Adecco/MPS
  • British Energy/EDF
  • The UK Competition Commission/CMA market investigations into groceries; BBA Airports; Personal Protection; Statutory Audit Services; Private Healthcare and Market Studies in multiple sectors
  • International Cartel investigations in car parts and cables
  • GTCR UK/Gorkana
  • Actavis UK/Auden McKenzie
  • Smith & Nephew/Arthrocare Care Corporation
  • Coopervision/Sauflon Pharmaceutical His past European court cases include:
  • T2/93 Dan Air (EC Merger Regulation - air transport)
  • T3/93 TAT (EC Merger Regulation - air transport)
  • C384/93 Alpine Investments (financial services)
  • C9/93 Ideal Standard (exhaustion of trade mark rights)
  • T86/95 FEFC v. Commission (challenge to EC decision)
  • C296 and C307/93 France and Ireland v. Commission (interim measures challenge to agricultural measure)
  • C408/95 Eurotunnel v. SeaFrance (challenge to the legality of the duty free regime)
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