Sanofi
![](/Images/godic/202501/04/Sanofi.svg3929.png")
![Head office 54 rue de la Boétie, Paris 8th around.](/Images/godic/202501/04/Rue_de_la_Boétie,_54-563929.jpg")
![Former head office 174 avenue de France, Paris 13th around.](/Images/godic/202501/04/Sanofi_HQ3929.jpg")
Sanofi S.A. is a French multinational pharmaceutical company headquartered in Gentilly, France, as of 2013 the world's fifth-largest by prescription sales. The company was formed as Sanofi-Aventis in 2004 by the merger of Aventis and Sanofi-Synthélabo, which were each the product of several previous mergers. It changed its name to Sanofi in May 2011. The company is a component of the Euro Stoxx 50 stock market index.