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Johan Ysewyn advises on all aspects of EC, international and Belgian antitrust law, including merger control, compliance, cartel and leniency issues and abuse of dominance cases.  He acts as the head of the firm’s EU Competition group, working from our Brussels and London offices.

Mr. Ysewyn's practice has a strong focus on global and European cartel investigations and he has represented companies from a range of sectors.  He is also one of the leading experts on EU state aid issues, working both for beneficiaries and governments.

  • Advised the immunity applicants in the bitumen and marine hose cartels in the EU and global cartel investigations.
  • Advised the Belgian government in the Dexia, Belfius and Arco state aid investigations.
  • Advised the airline Air Baltic in the in-depth state aid investigation.
  • Advised a number of companies involved in cartel investigations into consumer products, feedstuffs, stevedoring services.

Memberships and Affiliations

  • Chair of the Belgian Competition Lawyers Association 
  • Professor Cartel Law and Economics at the Brussels School of Competition
  • FT Innovative Lawyer Awards, "Highly Commended" in the category "Creating a new standard" (2018)  
  • Chambers Global, Competition/European Law (2014-2021) and Competition/European Law: State Aid (2021)  
  • Chambers Europe, Competition/European Law (2014-2020) 
  • Legal 500 EMEA, Competition - Belgium, UE and Global (2016-2017) 
  • Who’s Who Legal, Thought Leaders - Competition (2019)
  • Global Competition Review, Thought Leaders - Competition (2018)
  • Best Lawyers in Belgium, Competition/Antitrust (2014-2015)
  • The International Who's Who of Competition Lawyers & Economists (2014) 
  • IFLR Expert Guides, Competition and Antitrust (2014) 
  • IFLR1000, EU Competition (2020)
  • Highly Recommended, Global Competition Review