Stéphane Dionnet is a partner at McDermott Will & Emery, based in Brussels. Prior to that, he worked at Skadden, also in Brussels. Stépahne 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. He has worked with clients from a diverse range of industries including consumer products, energy, entertainment, financial services, pharmaceuticals, retail and telecommunications. Earlier in his career, Stéphane 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, including phases 1 and 2 with remedies.
The EU General Court issues its judgment upholding the Commission ’ s decision to fine a telecommunications company for gun-jumping (Altice / PT Portugal)Concurrences Bulletin, Bill Batchelor, Frederic Depoortere, Giorgio Motta, Ingrid Vandenborre, Stéphane Dionnet and Geraldine de Vasconcelos Lopes, 1 October 2021, e-Competitions