
Sanofi and Regeneron Rebuild Alliance with $8B Immunology Deal
Sanofi and Regeneron have signed a new collaboration agreement worth up to $8 billion to develop four early-stage immunology assets. The deal includes a $1 billion upfront payment from Sanofi and up to $7 billion in potential milestone payments. This partnership aims to secure future growth for Sanofi as its blockbuster drug, Dupixent, faces patent expiration in 2031. The agreement also resolves a 2024 lawsuit filed by Regeneron against Sanofi over commercialization details. Regeneron will lead research and development for the assets, while Sanofi will handle global commercialization. The most advanced asset, REGN20423, is already in clinical trials for eczema.





