Blackstone backs Pfizer obesity drug with $1.5B
Blackstone Life Sciences and funds managed by its perpetual private equity strategy will provide Pfizer up to $1.5 billion through 2028 to help develop berobenatide, an experimental monthly GLP-1 drug for chronic weight management and obesity-related conditions. In return, Blackstone may receive payments tied to U.S. regulatory approval and commercial sales milestones, but Pfizer retains ownership, operational control and decision-making. Pfizer plans more than 20 trials for obesity and related conditions in 2026, including 10 ongoing or planned Phase 3 trials of berobenatide, which is also being studied for conditions including sleep apnea and knee osteoarthritis. The agreement expands a funding relationship between the companies and gives Pfizer additional resources as it seeks to compete in a market dominated by Eli Lilly and Novo Nordisk.
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