Sanofi completes acquisition of Blueprint Medicines Paris, July 18, 2025. Sanofi today announces the completion of its acquisition of Blueprint Medicines Corporation (Blueprint), adding to its portfolio a commercialized medicine, a promising pipeline, and the expertise of a company specializing in systemic mastocytosis (SM), a rare immunological disease, and other KIT-driven diseases. In addition, the acquisition of Blueprint brings Sanofi an established presence among allergists, dermatologists, and immuno ...