Sanofi S.A. is a French multinational pharmaceutical and healthcare company headquartered in Paris. Founded in 1973, it expanded through mergers with Synthélabo in 1999 and Aventis in 2004. Sanofi focuses on researching, developing, manufacturing, and marketing a diverse range of prescription and over-the-counter medications, with strengths in immunology, oncology, cardiovascular, central nervous system, and diabetes. The company is advancing its innovative drug and vaccine pipeline, supported by significant R&D investments and strategic cost-saving measures.