Mersana
ClosedCambridge, United States · Founded 2001 · $103.0M raised
- Headquarters
- Cambridge, Massachusetts
- Employees
- 51–200
- Founded
- 2001
- Business Model
- B2B
- Website
- ir.mersana.com
- Total Funding
- $103.0M
- Last Round
- $33.0M Series CJun 2016
- Rounds
- 5
About
Mersana Therapeutics was a clinical-stage biopharmaceutical company focused on next-generation antibody-drug conjugates (ADCs) for cancer treatment, using its proprietary Dolasynthen and Immunosynthen ADC platforms. The company developed Emi-Le (emiltatug ledadotin), targeting B7-H4, for triple-negative breast cancer and other rare cancers. Mersana was acquired by Day One Biopharmaceuticals in January 2026.
Summary
Mersana is a Biotech company based in Cambridge, United States, founded in 2001. It has raised $103.0M in total across 5 rounds, most recently a $33.0M Series C round in Jun 2016. Investors include Wellington Management, New Enterprise Associates and Pfizer Ventures.
Tech & App Stack
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Funding History
Jun 2017
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Venture Round through IPO — per-round amounts, valuations, and who invested in each round.
Investors
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