Sébastien Champagne

Partner-in-Charge Brussels

Brussels + 32.2.645.15.20

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Sébastien Champagne focuses on complex domestic and cross-border litigation. He also has an active arbitration practice on both sides of the bench as counsel and arbitrator. He is Partner-in-Charge of the Brussels Office.

For more than 30 years, Sébastien has regularly represented and advised major national and international corporations in pretrial negotiations and in litigation before judicial and administrative courts as well as before various arbitral institutions. Sébastien's practice focuses mainly on commercial, telecom, antitrust, and regulatory/ESG (environmental, social, and governance) matters. Notably, he successfully represented several leading telecom operators and electronic payment companies in various high-stakes antitrust private enforcement matters. He also represents a global integrated energy company in a major climate change litigation proceeding.

He also advises and assists clients in internal compliance investigations.

Sébastien has served as a deputy judge at the Enterprise Court of Brussels since 2015. In addition, he has been a member of the Brussels Bar Council since 2023.

Experience

  • MasterCard defeats UK litigation claim regarding interchange fees for payment card transactionsJones Day client MasterCard Incorporated has defeated a lawsuit brought by various UK retailers seeking £450m in damages for losses allegedly suffered as the result of MasterCard's arrangements for setting default interchange fees on payment transactions.
  • BLACKB sells Darts-ip to Clarivate AnalyticsJones Day represented the various shareholders of BLACKB in the sale of all their shares to the Belgian subsidiary of the U.S. listed company Clarivate Analytics (US) LLC.
  • MasterCard resolves private enforcement claim surrounding allegations of excessive interchange feesJones Day represented MasterCard International in a private enforcement case initiated by Delhaize in relation to allegedly excessive interchange fees.
  • Sagevas, World Football Association, and Belgische PMU pursue successful abuse of dominance complaint against Belgian National LotteryOn behalf of Sagevas SA, the World Football Association, and Belgische PMU, Jones Day filed a complaint with the Belgian Competition Authority against the Belgian National Lottery for abusing its dominant position in the national sports betting market during the commercial launch of its sports betting product Scooore!
  • BASE Company successfully resolves abuse of dominance complaint brought against ProximusJones Day represented BASE Company in a damage claim for abuse of dominant position against Proximus NV, the Belgian mobile incumbent operator.
  • BASE obtains favorable decision in claim against Belgacom Mobile for abuse of dominant positionOn behalf of Dutch-based telecommunications operator KPN and its subsidiary BASE, Jones Day challenged abuses by Belgacom Group of its dominant position, which had radically distorted the competitive environment in the Belgian telecommunications market.
  • Telecom company defends against breach of contract claimsJones Day represented a telecom company in an ICC arbitration commenced against it by another telecom company for alleged breach of contract related to roaming services.
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