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Jennifer P.M. Marsh

Fax +44.(0)20.7648.9001
Jennifer Marsh is partner in the firm's London office. She concentrates her practice on all aspects of EU and UK competition law and commercial agreements.

Jennifer’s work covers merger control, including making submissions to the European Commission in Brussels and coordinating merger filings globally; advising on litigating competition law issues before the English courts, including two appeals before the Court of Appeal; advising on global distribution strategies throughout Europe, including online resale policies, marketplace strategies and selective distribution; bringing and defending competition law based complaints before the regulators; and drafting and implementing compliance programs; and drafting and advising on commercial agreements.

Described as “incredible” by clients in Legal 500, Jennifer speaks English and German, having previously practiced in Berlin. She was a member of the International Task Force of the American Bar Association from 2015-2018. Her clients include Cummins, Formula One, Freeport McMoran, the International Molybdenum Association, Arena Racing and PING.

Professional Background

Prior to joining the firm, Jennifer worked at the London and Berlin offices of a leading international law firm. She qualified in 2006.


  • Recommended by Legal 500
  • Selected as a 2016, 2015 and 2014 London Rising Star in Thomson Reuters’ Super Lawyers

Professional/Civic Activities

  • Member of The American Bar Association Section of Antitrust’s International Task Force 2014-2018
  • Member of The American Bar Association and Representative on The International Committee of the Antitrust Section for 2013-14 
  • Member of The Competition Section of the Law Society of England and Wales

Speaking Engagements

  • “A Guide to Promotions and Pricing in the UK”, Revenue Management and Pricing International Conference, 8 June 2017
  • “Brexit’s Impact on Competition Enforcement”, ABA Teleseminar, 30 June 2016
  • “Best Available Rate and Competition Law: An Update”, European Tour Operators Association, 25 November 2015
  • “Competition Compliance Training”, Client Seminar, 14 January 2016
  • “Private Antitrust Litigation in the UK”, ABA Teleseminar, September 2014
  • "Controlling Holiday Pricing and Competition Law”, ABTA Seminar, May 2014
  • “Best Available Rates,” ETOA Seminar, September 2013
  • “EU Competition Law: Update & Recent Developments,” Kaplan Webinar, October 2011
  •  “Best Available Rate and Competition Law - Are you at Risk?” ETOA Seminar, June 2011
  •  “Overview of UK Merger Control," client seminar, November 2009 
  •  “Competition Law Compliance,” client seminar, September 2009

Additional Information

Jennifer earned her Modern Languages Diploma in German alongside her law degree from the University of Cambridge in 2001.

  • “German Lottery Monopoly under Fire,” Global Competition Review, October 1 2006
  • Advising Ping, the golf club manufacturer, on its challenge to the Competition and Markets Authority’s finding of infringement in relation to its online sales policy before the Competition Appeal Tribunal and Court of Appeal.
  • Advising Beckman Coulter on European competition and merger control issues.
  • Advising Euro Car Parts on its acquisition of the Andrew Page Business, seeking consent from the Competition and Markets Authority and involving an initial enforcement order
  • Advising Balmoral Tanks on an information sharing investigation by the Competition and Markets Authority and subsequent appeal to the Competition Appeal Tribunal.
  • Advising Ampco-Pittsburgh Corporation on its acquisition of the Akers business.
  • Advising Arena Racing on competition issues surrounding the exploitation of media rights.
  • Advising a UK plc regarding a Type A leniency application to the Competition and Markets Authority.
  • Advising EuroChem on its acquisition of the K&S Nitrogen fertiliser business.
  • Advising EuroChem on its acquisition of the BASF Antwerp fertiliser business.
  • Advising Halliburton on merger control issues.
  • Advising Linea Limited on acquisition of control of Donalink.
  • Advising Arena Leisure plc on its merger with Northern Racing.
  • Advising PUMA on the competition aspects of its sponsorship agreement with Arsenal FC.
  • Acting for Cartonplastgroup Holding SA on its completed acquisition of the Demes logistics business from DS Smith plc, which resulted in a combined market share of approximately 85% but was cleared by the Office of Fair Trading on the basis of new entry and the anticipated expansion of smaller players.
  • Advising Cerberus Capital on obtaining merger control approval from the European Commission for its acquisition of Chrysler.
  • Advising Pearl Group regarding its acquisition of Resolution plc entailing numerous merger control approvals including by the Office of Fair Trading.
  • Advising a government Trading Fund regarding a complaint to the European Commission alleging abuse of a dominant position contrary to Article 102 of the Treaty on the Functioning of the European Union.
  • Drafting commercial agreements for companies such as Allegheny Technologies, Hometrack and Norbord.