Cleary Gottlieb Steen & Hamilton (Brussels)

Christopher J. Cook

Cleary Gottlieb Steen & Hamilton (Brussels)

Christopher J. Cook joined Cleary Gottlieb Steen & Hamilton in 1997 where he is a partner in their Brussels office. His practice focuses on international competition and antitrust law. In the transactional field, he has extensive experience representing both transacting and opposing parties in mergers and joint ventures before the European Commission and various antitrust regulators in and beyond Europe. He has also worked on a number of non-transactional competition matters in Europe and abroad involving alleged abusive conduct and cartel behaviour.


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Cleary Gottlieb Steen & Hamilton (Cologne)
Cleary Gottlieb Steen & Hamilton (London)
Cleary Gottlieb Steen & Hamilton (Hong Kong)
Cleary Gottlieb Steen & Hamilton (Brussels)
Cleary Gottlieb Steen & Hamilton (Washington)


2427 Bulletin

Christopher J. Cook The EU Court of Justice AG Kokott advises the Court to uphold the Commission’s appeal on the grounds that the General Court erroneously applied a stricter burden of proof for the SIEC test and erred in law by misinterpreting the concept of a SIEC (Telefónica UK / Hutchison 3G UK)


Advocate General Sides with Commission in its Appeal of General Court’s Overturning of Three/O2 Prohibition* Non-binding opinion finds that General Court erred in applying heightened standard of proof to cases involving unilateral effects in oligopolistic markets. The Case and the Opinion On (...)

Christopher J. Cook, Francisco Enrique González-Díaz, François-Charles Laprévote, Maurits J. F. M. Dolmans, Nicholas Levy, Thomas Graf The EU Commission fines a company for providing incorrect or misleading information during its investigations on a merger (Facebook / WhatsApp)


On May 18, 2017, the European Commission (the “Commission”) fined Facebook €110 million for providing incorrect or misleading information during its 2014 investigation of its acquisition of WhatsApp The magnitude of the fine dwarfs the few penalties the Commission has imposed in the past for (...)

886 Review

Christopher J. Cook Real review timetables under the EU Merger Regulation


This article presents the results of an empirical analysis of how long EU Merger Regulation reviews, and in particular pre-notifcation discussions, actually take. Our research shows that pre-notification and overall review periods for all types of cases—Short Form/simplifed, normal Phase I, and (...)

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