Marion Leydier has over 25 years of experience with Sullivan & Cromwell in France and the US. Marion’s practice is primarily focused on domestic and cross-border M&A, private equity, restructuring and securities transactions involving insurance companies and other financial institutions, including banks, private equity funds and investment advisers, and the process of obtaining related regulatory approvals.

Marion also represents US and international financial institutions in connection with a variety of matters before federal, state and international regulatory bodies. Marion co-leads both the firm’s global insurance/reinsurance practice and North America insurance practice.

Marion was awarded a JD from Columbia Law School. She also earned degrees from the University of Paris, Panthéon-Sorbonne. She is a member of the Bar Association of New York.

Marion has been recognized as a leading lawyer by numerous legal publications, including M&A Advisor, The Legal 500 United States and New York Super Lawyers.