STAT+: Sanofi to buy Blueprint Medicines in deal worth more than $9 billion

Sanofi plans to buy Blueprint Medicines in a deal worth more than $9 billion, expanding its immunology pipeline

Jun 2, 2025 - 09:40
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STAT+: Sanofi to buy Blueprint Medicines in deal worth more than $9 billion

LONDON — Sanofi said Monday it plans to buy Blueprint Medicines in a deal worth more than $9 billion, as the French pharma firm expands its immunology pipeline, a key focus for the company.

Sanofi is paying $129 per share in cash for Blueprint, amounting to a $9.1 billion equity value and a 27% premium on the biotech’s closing price on Friday. It’s also offering potential milestone payments worth up to $400 million based on development and regulatory successes for the experimental drug BLU-808, which is being tested in a number of allergic and inflammatory diseases.

Blueprint, based in Cambridge, Mass., has an approved drug called Ayvakit that treats a rare immunological condition called systemic mastocytosis. It brought in $479 million in revenue in 2024, with Blueprint forecasting that sales of the drug could reach $2 billion by 2030. 

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