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Sanofi Expands Regeneron Alliance With Four Long-Acting Antibodies, Paying $1B Upfront With Up To $7B In Milestones; Costs And Profits Shared Equally

Oct 1, 2026 · 01:48 AM ET· updated 21h ago

REGN20423, a clinical-stage long-acting IL-13 monoclonal antibody invented and developed by Regeneron, is added to the alliance, along with a long-acting IL-4xIL-13 bispecific and two other long-acting preclinical

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Why It Matters

Sanofi and Regeneron are teaming up on new medicines together. Sanofi is paying billions now and later if these drugs work out.

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Source: Benzinga · Read the original report at the publisher. Headline and figures shown for context; data may be delayed.

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