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Pfizer secures up to $1.5 billion from Blackstone for obesity drug development

By Thomson Reuters Nov 11, 2026 | 3:42 PM

Nov 11 (Reuters) – Pfizer said on Wednesday that Blackstone would provide up to $1.5 billion ​through 2028 to help ‌fund the development of an experimental monthly obesity treatment the drugmaker picked up last year with its ‌up ​to $10 billion ⁠acquisition of Metsera.

Pfizer said ⁠the deal would give it more flexibility to invest in its broader pipeline across ​therapeutic areas, adding that it will keep full control ⁠over the development ⁠program for the drug, ​berobenatide.

In exchange for the funding, ​Blackstone will be eligible to receive ‌milestone-based payments, but will not get any rights or ownership in the medication.

The companies ⁠did not immediately disclose the size of the milestone payments. They said ⁠the ‌payments would be subject ⁠to US regulatory approval ​of ‌monthly dosing of injectable ​berobenatide ⁠monotherapy for chronic weight management, and achievement of certain commercial sales milestones.

(Reporting by Michael Erman in New York; Editing by ​Bill Berkrot)