# Day One to Acquire Mersana Therapeutics to Advance Mission to Bring New Medicines to People of All Ages with Life-Threatening Diseases
Canonical URL: https://biopharmsignal.com/news/DAWN/day-one-to-acquire-mersana-therapeutics-to-advance-mission-to-bring-new-medicines-to-people-of-all-ages-with-life-threatening-diseases
Ticker: DAWN
Company: Day One Biopharmaceuticals
Source: Day One Biopharmaceuticals
Published: 2025-11-13 11:00 EST
Original Source URL: https://ir.dayonebio.com
## Summary

Acquisition expands Day One’s portfolio with novel antibody-drug conjugate (ADC) emiltatug ledadotin (Emi-Le) Emi-Le has demonstrated early anti-tumor activity in an ongoing Phase 1 study for adenoid cystic carcinoma type-1 (ACC-1), a cancer with high unmet need and a lack of therapeutic options

## Article Body
Acquisition expands Day One’s portfolio with novel antibody-drug conjugate (ADC) emiltatug ledadotin (Emi-Le) Emi-Le has demonstrated early anti-tumor activity in an ongoing Phase 1 study for adenoid cystic carcinoma type-1 (ACC-1), a cancer with high unmet need and a lack of therapeutic options
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