Day One Biopharmaceuticals to Acquire Mersana Therapeutics

Reuters
2025.11.13 11:00
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Day One Biopharmaceuticals has announced a definitive merger agreement to acquire Mersana Therapeutics, enhancing its portfolio with the antibody-drug conjugate emiltatug ledadotin (Emi-Le), currently in Phase 1 trials for adenoid cystic carcinoma type-1. The deal includes a tender offer of $25 per share in cash, plus potential milestone payments, totaling up to $55.25 per share, with an overall deal value of approximately $285 million.