Mersana Therapeutics
formerly MersanaIPOTargeted Therapies for Children and Adults
Public · Cambridge, United States · Founded 2001 · $136.1M raised
- Headquarters
- Cambridge, Massachusetts
- Employees
- 51–200
- Founded
- 2001
- Business Model
- B2B
- Website
- mersana.com
- Total Funding
- $136.1M
- Last Round
- $33.0M Series CJun 2016
- Rounds
- 6
- Type
- Public
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
About
Mersana Therapeutics was a clinical-stage biopharmaceutical company focused on antibody-drug conjugates and cancer research. Day One Biopharmaceuticals completed its acquisition of Mersana on January 6, 2026, adding Emi-Le to Day One's oncology pipeline for patients of all ages. The former Mersana site now presents Day One's targeted-therapy work, and subsequent announcements describe Day One becoming part of Servier's rare oncology portfolio.
Summary
Mersana Therapeutics is a Biotech company based in Cambridge, United States, founded in 2001. It has raised $136.1M in total across 6 rounds, most recently a $33.0M Series C round in Jun 2016. Investors include New Enterprise Associates, Wellington Management and Pfizer Ventures.
Tech & App Stack
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Funding & Exit History
Jun 2017
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Funding: Venture Round through Series C. Amounts, valuations, and investors where available.
Investors
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