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.
1966 | Events
Time to Prepare for A New Regulatory Hurdle for M&A Transactions and Public Procurements Within the European Union On December 23, 2022, Regulation (EU) 2022/2560 of December 14, 2022 on foreign subsidies distorting the internal market (FSR) was published in the Official Journal of the (...)
On April 26, 2023, the Competition and Markets Authority (CMA) blocked what would otherwise have been the largest deal in the gaming industry to date. The decision highlights several important trends, such as: In dynamic markets, regulators are focusing in on whether a deal harms or could harm (...)
The EU Commission has adopted a legislative package to further streamline the simplified merger control procedures within the European Union On April 20, 2023, the EU Commission (Commission) adopted and published a package to simplify the procedures for reviewing concentrations under (...)
On September 22, 2021, the European General Court issued its judgment upholding the decision by the European Commission (Commission) to fine Altice for gun-jumping in the acquisition of Portugal Telecom (PT) in 2015. The General Court did grant Altice a limited 5% reduction of part of the €124.5 (...)
On September 22, 2021, the European General Court issued its judgment upholding the decision by the European Commission (Commission) to fine Altice for gun jumping in the acquisition of Portugal Telecom (PT) in 2015. The General Court did grant Altice a limited 5% reduction of part of the €124.5 (...)
"Johnson & Johnson/Guidant: potential competition and unilateral effects in innovative markets"* 1. Introduction Following an in-depth investigation, on 25 August 2005 the European Commission authorised under the Merger Regulation the planned $ 24 billion (around € 18 billion) acquisition (...)