Sébastien Sayn-Urpar

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Aude Serres van Gaver is a top attorney recognized by Best Lawyers in the practice area(s) of Insolvency and Reorganization Law. Aude, who practices law in Versailles, France, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Aude is held by other top lawyers in the same geographic and legal practice area.

Frank Martin Laprade is a corporate law specialist, with a particular focus on listed companies in Paris. He has been a lecturer and researcher at the University of Paris Sud (XI) and a member of the Ansa legal committee for over 15 years. His expertise includes advising on takeover bids, issuance of securities giving access to capital, listing and delisting of companies on the stock exchange, as well as litigation (administrative sanctions, market abuse, shareholder disputes). He is also the...

Alexis BECQUART is co-head of the PARIS office’s Non-Profit Organizations and Social Entrepreneurship Department. He has developed recognized expertise in : legal and tax aspects of founding, reorganizing and restructuring non-profit organizations legal and tax structure of trade unions and professional bodies, on which he spends over a third of his time (articles of association, division into sectors or subsidiaries, mergers, competition regulations applicable to trade unions, etc.) le...

Bertrand Delafaye is a top attorney recognized by Best Lawyers in the practice area(s) of Capital Markets Law and Corporate Law. Bertrand, who practices law in Paris, France, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Bertrand is held by other top lawyers in the same geographic and legal practice area.

Clémence Lemétais d'Ormesson is a top attorney recognized by Best Lawyers in the practice area(s) of Arbitration and Mediation and Litigation. Clémence, who practices law in Paris, France, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Clémence is held by other top lawyers in the same geographic and legal practice area.

Marie Fillon is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law. Marie, who practices law in Paris, France, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Marie is held by other top lawyers in the same geographic and legal practice area.

Pierre-Jacques Castanet is the managing partner of In Extenso Avocats Ile de France, a firm that provides advice in the fields of labor and employment and tax law. He runs the firm’s labor and employment law department with his partner, Stanislas Dublineau. He specialises in employment and social welfare law. Before joining In Extenso Avocats, Pierre-Jacques was a partner at IDAvocats and Idrac & Associés. With more than 30 years’ experience at the Paris Bar, Pierre-Jac...

Olivier Lyon Lynch has developed a practice dedicated to players in the banking, financial and insurance sectors. On the banking and financial side, he assists them in any legal disputes they may encounter with their partners or customers. In this respect, Olivier has acted on behalf of numerous credit institutions and asset management companies in litigation cases involving fraud (Ponzi schemes, payment fraud, identity theft, etc.). He also assists financial institutions in disciplinary proc...

Cécile Théard-Jallu has developed in-depth expertise as an attorney in private practice representing multinational corporations, including major US and European firms and organizations in the R&D and healthcare sector (public or private research institutions, academics, pharmaceutical laboratories, biotechnology companies, medical equipment manufacturers, service providers, software or connected health platforms publichers, investors, competitiveness clusters, tech transfer ...