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Sanofi to pay Regeneron $1 billion upfront in expanded immunology deal

By Thomson Reuters Oct 1, 2026 | 12:16 AM

Oct 1 (Reuters) – French drugmaker Sanofi said on Thursday it would pay US ​partner Regeneron $1 billion ‌upfront and up to $7 billion more in milestone payments to add four next-generation, long-acting immunology ‌antibodies ​to the ⁠partnership behind their ⁠blockbuster eczema drug Dupixent.

The companies said they had settled earlier litigation over the collaboration ​and that they would split costs and profits ⁠of the expanded ⁠partnership equally.

• The ​four antibodies target the same type ​2 inflammation pathways as Dupixent, ‌which more than 1.5 million patients use across nine indications

• Regeneron will lead ⁠research and development and Sanofi will lead global sales

• The existing Dupixent ⁠profit-sharing ‌terms will not ⁠change

• Regeneron also ​has ‌the option to join Sanofi’s ​experimental drug lunsekimig ⁠once its late-stage trials for chronic obstructive pulmonary disease are finished

(Reporting by Hugo Lhomedet in Gdansk, editing by ​Milla Nissi-Prussak)