Jones Day (London)

Mark Jones

Jones Day (London)

Mark Jones is a partner at Jones Day based in the firm’s London office. He has over 25 years of experience advising on complex and high-profile competition/antitrust issues. He has obtained competition clearances for M&A transactions and joint ventures and has represented clients in cartel, monopoly, and market investigations. Mark advises on UK, EU, and multijurisdictional matters. Sectors in which he has particular experience include financial institutions, technology, pharma, energy and infrastructure, entertainment and media, and retail and consumer. Mark has been described in legal directories as an "excellent technician and tactician" and a "fantastic competition lawyer." Mark also regularly advises on foreign direct investment regimes, the economic regulation of utilities, and subsidy control rules. Mark’s experience includes a secondment to the Office of Fair Trading, the predecessor to the Competition and Markets Authority (CMA). Prior to joining Jones Day in 2022, Mark’s recent cases include: CMA merger clearance for Kustomer, Inc. of its acquisition by Facebook; CMA and European Commission merger clearance for ASM Global, a joint venture between AEG and SMG, to establish a leading worldwide venue management and services company; representing OFGEM, the UK energy regulator, in its successful defense against appeals before the CMA by nine energy companies relating to its RIIO-2 price control decisions for the United Kingdom’s electricity and gas transmission and gas distribution networks; successfully defending a generics pharmaceutical company in a cartel investigation by the CMA in relation to the supply of two generic pharmaceutical products in the United Kingdom; and advising a major UK retail bank on the State aid aspects of the UK government’s COVID-related support loan schemes.


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Jones Day (Sydney)
Jones Day (Mexico)
Jones Day (Brussels)
Jones Day (New York)
Jones Day (Hong Kong)


1940 Bulletin

Eric Paroche, Sabrina Borocci, Casto Gonzalez-Paramo, Mark Jones, Suyong Kim, Falk Schöning, Marc Schweda The EU Commission authorises State aid measure following the COVID-19 outbreak to help companies cover their immediate liquidity needs through bank loans guaranteed by EU member states


The first State aid measures authorized by the European Commission (Commission) following the COVID-19 outbreak were aimed at helping companies to cover their immediate liquidity needs, mainly through bank loans guaranteed by EU Member States. The significant losses incurred by companies as a (...)

Simi Malhi, Ciara Kennedy-Loest, Christopher Hutton, Matthew Giles, Angus Coulter, Mark Jones The UK Competition Authority publishes guidance on forms of cooperation considered as temporarily permissible during the COVID-19 outbreak


Competition/antitrust laws generally require rival firms to operate on the market independently of each other and tolerate cooperation between competitors only in limited circumstances where any resulting loss of competition is clearly offset by consumer benefits. But as businesses scramble to (...)

Mark Jones, Matthew Giles The UK Competition Authority issues its annual plan for 2020/2021 which aims to give clarity to the Competition Authority’s objectives for the next year and clarifies its position during the social and economic turmoil caused by the COVID-19 outbreak


The UK Competition and Markets Authority ("CMA") recently issued its Annual Plan for 2020/2021, which aims to give clarity to the CMA’s objectives for the next year. The report acknowledges that its publication comes out at a time of massive social and economic turmoil caused by the COVID-19 (...)

Mark Jones, Christopher Peacock The EU Court of Justice upholds the Commission’s fine against a fish farming and processing company for infringing merger control rules (Marine Harvest)


Norwegian salmon farmer Marine Harvest has been unsuccessful in its appeal to the Court of Justice of the European Union (CJEU) regarding substantial and separate fines imposed on it by the European Commission for both failing to notify a merger and for ’jumping the gun’ in implementing the (...)

Mark Jones, Matt Giles The EU Commission fines a camera and printer manufacturer €28M for partially implementing its acquisition prior to the transaction being notified to the Commission (Canon / Toshiba)


On 27 June 2019, the European Commission (Commission) announced it had fined Japanese camera and printer manufacturer, Canon, €28m for partially implementing its 2016 acquisition of Toshiba Medical Systems prior to the transaction being notified to the Commission and, as a result, before it had (...)

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