Johan Ysewyn

Covington & Burling (Brussels)
Lawyer (Partner & Professor)

Johan Ysewyn is a partner at Covington & Burling in Brussels. He advises on all aspects of EC, international and Belgian antitrust law, including merger control, compliance and cartel and leniency issues. He has acted for both parties and complainants. Johan’s practice has a strong focus on global and European cartel investigations and he has defended companies from a range of sectors. Johan has written and lectured extensively on international cartel and leniency-related issues. He co-authors the loose-leaf European Cartel Digest and lectures on cartel law and economics at the Brussels School of Competition. He has acted for the immunity applicants in the bitumen and marine hose cartels and acted for defendants in alleged cartels in consumer goods, pharmaceuticals and chemicals. He is currently acting in a series of cartel investigations by the European Commission in relation to consumer electronics and price benchmarking in the oil sector. He has also acted for the European Payments Council in the first European Commission investigation into standardisation agreements, notably in the e-payments sector. Over the last four years, he has also been very active in the state aid area advising a number of leading banks and governments. He has notably been involved in the Fortis, KBC, Dexia, Arco, Citadele and Air Baltic state aid cases. Johan speaks regularly at conferences such as GCR, IBC, IBA, Chatham House and industry events and has written for numerous legal publications and is recognised as a leading competition lawyer by Chambers & Partners, Legal 500 and other industry guides. Johan has acted as a non-governmental advisor to the International Competition Network (ICN). He has also been asked to advise the European Competition Network on the review of the ECN leniency policies.


Auteurs associés

DG COMP (Brussels)
Covington & Burling (Brussels)
DG COMP (Brussels)
Covington & Burling (Brussels)


3629 Bulletin

Jennifer Boudet, Johan Ysewyn Leniency and competition law : An overview of EU and national case law


More than 20 years after the adoption of the first European Commission Leniency Notice, the detection and sanctioning of cartels remains a key feature of the enforcement agenda of the European Commission (the “Commission”) and – the currently still 28 – European Union (“EU”) national competition authorities (“NCAs” or “CAs”). Leniency programmes are a crucial tool in uncovering cartels, with a large majority of cartel decisions adopted by European competition authorities based on immunity and leniency applications. But for how long ?

1535 Revue

Johan Ysewyn, Siobhan Kahmann The decline and fall of the leniency programme in Europe


Les auteurs étudient les raisons derrière la réduction des demandes d’immunité pour les cartels. Cela confirme le recours de la Commission aux demandes d’immunité pour détecter les cartels, décrit en détail les caractéristiques des dispositions actuelles pour les demandeurs et fait le bilan d’éventuels (...)


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