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Olivier d'Ormesson 

Partner, Paris 

Avocat à la Cour


Specialist in EC and French competition law, with substantial experience in EC and French merger control (particularly in complex Phase II cases), anti-competitive practices, abuses of dominant position and state aid. Olivier worked in Brussels for 15 years and for 4 years in New York.

He regularly represents clients before the European Commission, the French Competition Authority (Autorité de la Concurrence) and before the French and European courts. He is renowned for his degree of expertise across a wide range of competition law areas and has a strong profile in both the Paris and Brussels markets. He is widely regarded as one of the top practitioners in the market for complex antitrust and state aid cases. Particular sectors where Olivier has expertise include: pharmaceuticals, IT, transport, the automotive industry, beverages and energy.

Olivier teaches a competition law course at the French university, Sciences-Po.

Olivier has been classed in Band 1 by the reviews Chambers and Legal 500 both as an individual, and with his team, for more than 5 years and in their last 2013 edition.

Recent transactions of significance where substantial involvement can be disclosed have included advising: 

  • In complex merger transactions: after cases such as GDF/Suez, Sanofi/Aventis, Air France/KLM, Olivier represented the CDC and Transdev in the framework of the Veolia/Transdev merger, which gave rise to Phase 2 procedures in France and in the Netherlands and concluded with new and creative remedies 

  •  A leading IT multinational group in the framework of procedures before the French Competition Authority and the Paris Commercial Court concerning the distribution of their products in France.

  • A leading pharmaceutical company in the framework of several dawn raid investigations led by the French Competition Authority and the Commission and the follow-on procedures initiated by the Commission.

  • Peugeot on competition law aspects of all of its strategic alliance projects, including those with Ford, Toyota, and more recently, General Motors

  • the CDC in several State aid cases and the Consortium de Réalisation (CDR) in relation to an appeal before the European Court of Justice concerning the Commission’s “Stardust” decision. This is a ground-breaking case in the field of State aid, as it changes the definition of ‘State resources’.

Professional experience

2003 to date Partner, Linklaters Paris
1999 - 2003 Partner, Linklaters Brussels
1992 - 1999 Partner, Gide Loyrette Nouel Brussels
1989 - 1992 Partner, Gide Loyrette Nouel New York
1986 - 1989 Partner, Gide Loyrette Nouel Paris
1983 - 1986 Assistant then Partner, Gide Loyrette Nouel Brussels
1980 - 1983 Assistant, Gide Loyrette Nouel Paris
1979 - 1980 Foreign Associate, Sullivan & Cromwell New York
1978 - 1979 Assistant, Gide Loyrette Nouel Paris


1989 - Licensed as a Legal Consultant in New York
1978 - Admitted as a member of the Paris Bar ranking first in admission
1977 - Paris Law School - Maîtrise en droit
1976 - Rouen Business School, Tax and Finance


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