Acquiring Company
Day One Biopharmaceuticals
Acquired Company
Mersana Therapeutics
BrisbaneCambridgeBiotechnologyHealth CareTherapeuticsPharmaceuticalBiopharmaBiotechnologyHealth CareTherapeuticsDescription
Day One Biopharmaceuticals has announced their acquisition of Mersana Therapeutics for approximately $130 million. Mersana shareholders will receive an upfront cash payment combined with milestone-based contingent value rights. This acquisition reflects Day One's strategy to diversify its pipeline and enhance its oncology offerings.
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When Day One Biopharmaceuticals changes hands, the new owners review vendors, systems and leadership. That is when the door opens.
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Frequently asked
Who acquired Mersana Therapeutics?
Mersana Therapeutics was acquired by Day One Biopharmaceuticals, based in Brisbane. The deal was reported on November 30, 2025. Day One Biopharmaceuticals is a clinical-stage biopharmaceutical company dedicated to developing and commercializing targeted therapies for people of all ages with life-threatening diseases. Day One Biopharmaceuticals is privately held and operates in Biotechnology.
When did Day One Biopharmaceuticals acquire Mersana Therapeutics?
Day One Biopharmaceuticals's acquisition of Mersana Therapeutics was reported on November 30, 2025. Day One Biopharmaceuticals has announced their acquisition of Mersana Therapeutics for approximately $130 million. Mersana shareholders will receive an upfront cash payment combined with milestone-based contingent value rights. Fundz records the date the transaction was first publicly reported, sourced from filings and company announcements.
What does Mersana Therapeutics do?
Mersana Therapeutics, Inc. is a biotechnology company focused on developing next-generation antibody-drug conjugates (ADCs) for cancer treatment. Their innovative ADC platform enables the design of more effective cancer therapies. It is privately held, operating in Biotechnology, and is based in Cambridge.
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