Regeneron Pharmaceuticals, Inc. specializes in research, development, producing, and selling drugs used in treating ophthalmologic and inflammatory diseases and cancers. Net sales break down by type of revenue as follows: - revenues from product sales (53.7%); - revenues from collaboration agreements (42.7%): collaboration with Sanofi (74.8% of revenues), Bayer (24.7%) and other (0.5%); - revenues from sales of technology licenses and subcontracted research services (3.6%). At the end of 2024, the group had a portfolio of approximately 40 products in clinical development.