‘Jonny Cohen is a star in the making: always on top of things and ready to go the extra mile to get things just right.‘
Legal 500 2022


Jonathan Cohen is a senior associate in the Litigation & Dispute Resolution practice of the London office, having joined Mayer Brown in September 2010. He advises and acts for clients on litigation and arbitration matters in a variety of commercial contexts, often with a multi-jurisdictional element. Jonathan has experience of handling complex and high value commercial disputes, pursuing claims all the way up to and through trial, as well as using mediation as a dispute resolution mechanism to assist clients achieve their commercial objectives.

Jonathan has a particular focus on finance and corporate related disputes, and also has experience of working across a wide variety of different industry sectors, including the energy, financial services, technology, shipping and food sectors. He regularly acts in disputes involving complex issues of contractual interpretation, misrepresentation and the existence or scope of tortious duties. He has particular experience in warranty claims, supply chain disputes, shareholder and JV disputes, competition related claims and product liability and safety matters across a range of industries.

Jonathan has previously spent time on secondment to a global investment bank and a music publisher.


  • 英語


  • Acting in an ICC arbitration for a large multinational food manufacturer relating to a breach of contract claim.
  • Acting for an international engines manufacturer and successfully obtaining an anti-suit injunction in relation to a breach of an arbitration agreement relating to proceedings issued in Lebanon.
  • Advising UBS in English Commercial Court proceedings concerning single-tranche CDOs and credit default swaps entered into with a municipal water company: UBS and another v Kommunale Wasserwerke Leipzig GmbH and others [2014] EWHC 3615.
  • Advising Spanish real estate investment fund in litigation concerning breaches of loan documentation including material adverse change and the construction of a London hotel: Grupo Hotelero Urvasco SA v Carey Value Added SL [2013] EWHC 1039 (Comm).
  • Advising BASF on the first competition law case heard before the Supreme Court, securing a landmark decision on limitation periods BCL Old Co Ltd and others v BASF SE (formerly BASF AG) and others (No 2) [2012] UKSC 45.
  • Advising various corporates in relation to product liability and product safety issues.
  • Advising a global financial institution in relation to a data breach.
  • Advising the sellers of a wind farm in litigation arising out of alleged breach of warranties associated with the UK grid code.
  • Acting in relation to a joint-venture agreement in a dispute concerning an OTC derivative trading business.
  • Advising a luxury yacht manufacturer in relation to several commercial disputes.
  • Representing a financial services group in a warranty claim arising from their purchase of an investment management and research firm.
  • Representing a bulk shipping owner in a multi-party charter party dispute arising from an engine failure.


Kaplan Law School, LPC

BPP University Law School, GDL

バーミンガム大学, BA Hons (American and Canadian Studies)

University of California, San Diego
(study abroad programme)


  • 英国法(イングランド及びウェールズ)事務弁護士(ソリシター)
  • Solicitor Advocate with Higher Rights of Audience (Civil)
  • Listed as a key lawyer for International Arbitration (Legal 500 2024).
  • Listed as a key lawyer for Commercial Litigation (Legal 500 2023).
  • Listed as a key lawyer for Commercial Litigation, he ‘is a star in the making: always on top of things and ready to go the extra mile to get things just right.‘ (Legal 500 2022).
  • Listed as a key lawyer for Commercial Litigation (Legal 500 2021).