Sanofi to Lay Off 229 Blueprint Employees and Close Cambridge Offices
Sanofi is laying off 229 former Blueprint Medicines employees in Cambridge, MA, and closing two legacy Blueprint facilities at 45 Sidney St and 38 Sidney St. The company says the changes are part of integrating Blueprint after its July 2025 $9 billion acquisition, with remaining staff reporting to an East Cambridge office. Ayvakit/Ayvakyt brought €367 million net sales in the first half of 2026.