Stéphane Dionnet joined Skadden’s Brussels office in September 2006. Mr. Dionnet is a qualified lawyer and a member of the Brussels bar, and his practice focuses on European Union and international competition law. He has assisted clients in numerous cartel investigations, in particular with respect to leniency applications before the European Commission and other international competition agencies, as well as corporate investigations relating to cartels. Mr. Dionnet has worked with clients from a diverse range of industries including consumer products, energy, entertainment, financial services, pharmaceuticals, retail and telecommunications.
Prior to joining Skadden, Mr. Dionnet worked for three years within the “Merger Network” of the European Commission’s Directorate-General for Competition. He was case-handler in high-profile transactions in various industries including pharmaceuticals (Sanofi-Synthélabo/Aventis), entertainment (Sony/BMG), medical devices (Johnson & Johnson/Guidant), software (Microsoft/Time Warner/ContentGuard JV) and freight (CIMC/Burg). He also participated in “dawn raids” conducted by the European Commission in the context of cartel cases.
Mr. Dionnet is a native French speaker and is fluent in English.


EU Nonmerger Antitrust Enforcement Gets Stricter
April 8, 2015 | Transaction Advisors | Ingrid Vandenborre, Thorsten C. Goetz, Stephane Dionnet

European Commission Competition Law Enforcement to Focus on E-Commerce Restrictions
March 30, 2015 | Skadden, Arps, Slate, Meagher & Flom LLP | Steven C. Sunshine, Ingrid Vandenborre, Stephane Dionnet

Contributed to: Horizontal Agreements and Cartels in EU Competition Law
March 2015 | Oxford University Press | Ingrid Vandenborre, James S. Venit, Tiffany Rider, Stephane Dionnet

EU Nonmerger Antitrust Enforcement Gets Stricter
January 2015 | Skadden's 2015 Insights - Global Litigation | Ingrid Vandenborre, Thorsten C. Goetz, Stephane Dionnet

International Comparative Legal Guide to Competition Litigation 2015 (European Union)
2015 | ICLG To: Competition Litigation 2015 | Ingrid Vandenborre, Stephane Dionnet

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  • Year Qualified



    LL.M., (European Law) College of Europe Bruges, 2001
    LL.M., (Contract and Commercial Law) University of Helsinki, 2000
    D.E.S.S., (European Business Law) University of Paris V, Descartes, 1999
    Maitrise, (European Law) University of Paris I, Sorbonne, 1998
    License, Lapland University, Rovaniemi, Finland, 1997
    DEUG, University of Orléans, 1996