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Global Leader

Competition 2020

Professional Biography

WWL Ranking: Recommended

WWL says

Philip Mansfield enjoys acclaim for his distinguished competition practice, which encompasses mergers, cartel investigations and other behavioural matters.


Philip Mansfield is a senior partner in Allen & Overy's London antitrust group, splitting his time between the London and Brussels offices. He has led meetings for various clients with agencies around the world on merger, cartel and behavioural matters, including with the European Commission (EC), UK and US agencies, and China's Ministry of Commerce.

Philip regularly obtains approval for complex mergers and joint venture arrangements, particularly in the high-tech sector. He won the GCR Matter of the Year Award in  2011 and 2012 for merger-related cases; and the GCR Behavioural Matter of the Year in 2016 for the firm’s role on the EC’s credit defaults swap investigation. Philip has extensive cartel experience and is a regular speaker at the signature IBA/ABA cartel conference. Matters include advising a party in the first EU settlement case (DRAM); as well as advising parties in each of the FX, Rubber Chemicals, EPDM, Heat Stabilisers, GIS, Power Transformer, LCD, CRT and Auto Parts investigations.

Philip has also developed significant experience in advising financial institutions on cartel investigations and Financial Conduct Authority market studies, including strategies surrounding the merits of making immunity/leniency applications and engaging in settlement discussions with the EC. He is currently advising clients on their defences to several separate follow-on damages actions before the English and German courts, and has represented claimants in the English courts.

Philip has an established track record of helping companies to successfully raise and defend behavioural complaints before the EC and the UK courts relating to interoperability, bundling, patent pools and patent ambush.

Allen & Overy's global antitrust and competition practice comprises over 120 specialists operating across APAC, Europe and North America. The practice advises corporate clients and financial institutions on their global antitrust transactions, policies, litigation and regulatory strategies, and regularly acts on some of the highest-profile and most complex cases in the market.

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