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Sanofi to pay Regeneron $1 billion upfront in expanded immunology deal - Finance news and analysis from Global Banking & Finance Review
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Sanofi to pay Regeneron $1 billion upfront in expanded immunology deal

Published by Global Banking & Finance Review

Posted on October 1, 2026

1 min read

· Last updated: October 1, 2026

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Sanofi, Regeneron Expand Immunology Partnership With $1 Billion Upfront Deal

Details of the Expanded Immunology Collaboration

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.

Financial Terms and Milestone Payments

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

Key Points of the Agreement

  • 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
Litigation Settlement and Future Prospects

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

Key Takeaways

  • Upfront $1 billion payment from Sanofi to Regeneron, plus up to $7 billion in potential milestone payments, expanding their type 2 inflammation antibody collaboration (investor.regeneron.com).
  • Four new long‑acting antibodies—targeting IL‑13 (REGN20423), IL‑4, IL‑4Rα, and an IL‑4×IL‑13 bispecific—are added; REGN20423 is already in Phase 1, the others expected to enter clinic in 2027 (investor.regeneron.com).
  • Regeneron leads research & development; Sanofi leads global commercialization; costs and profits equally split; existing Dupixent profit-sharing remains unchanged (investor.regeneron.com).

References

Frequently Asked Questions

How much will Sanofi pay Regeneron in the expanded immunology deal?
Sanofi will pay Regeneron $1 billion upfront and up to $7 billion more in milestone payments.
Which companies are involved in the expanded immunology partnership?
French drugmaker Sanofi and US partner Regeneron are involved in the expanded immunology collaboration.
What drugs or therapies are included in the new Sanofi-Regeneron deal?
The deal adds four next-generation, long-acting immunology antibodies targeting type 2 inflammation, alongside their existing drug Dupixent.
Will the profit-sharing terms for Dupixent change under the new agreement?
The existing Dupixent profit-sharing terms will not change under the expanded partnership.
Who will lead research, development, and sales in the expanded collaboration?
Regeneron will lead research and development, while Sanofi will lead global sales.

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