Marie-Marie O. de Fays


Marie-Marie O. de Fays
Marie-Marie de Fays is an associate in Weil’s Antitrust Group. Her practice focuses on advising clients on all aspects of U.S. and EU antitrust law, with an emphasis on the global pre-merger notification and regulatory review process. She works with clients in a variety of industries including automotive, pharmaceuticals, financial services, consumer goods, and technology.

Prior to joining Weil, Marie-Marie was an associate with an international law firm, and was based in both Brussels and New York. She represented companies before the U.S. antitrust agencies, as well as advised clients in cartel and abuse of dominance matters before the European Commission and national competition authorities. Marie-Marie also worked as a contractor for the United Nations Conference on Trade and Development and interned at the European Commission – DG Competition and the Austrian Competition Authority.

Marie-Marie was a Harlan Fisk Stone Scholar at Columbia Law School where she received an LL.M. degree. Prior to attending Columbia Law School, Marie-Marie graduated magna cum laude from the College of Europe in Belgium where she received an LL.M. degree in European Legal Studies. She also earned a Master in Law with a specialization in European Law from Université Catholique de Louvain and her Bachelor’s Degree from Facultés Universitaires Notre-Dame de la Paix.

Marie-Marie has an extensive pro bono practice and is admitted to the New York State Bar.