Mersana Therapeutics Funding: $85M Raised, Series C (2026)

Mersana Therapeutics funding overview

Mersana Therapeutics is based in Cambridge, Massachusetts. Mersana Therapeutics has raised $85M in total disclosed funding. That places its disclosed total in the $25M–$100M range. Its most recent disclosed round is a Series C announced in June 2026. The round record for Mersana Therapeutics runs through 2026; nothing later has been disclosed. Investors on record include Third Rock Ventures, Nextech Invest, Pfizer Ventures, Boxer Capital, GordonMD Global Investments LP, Invus and 5 others. 11 distinct backers are named across the disclosed rounds.

Mersana Therapeutics at a glance

Total raised

$85M

Latest round

Series C

Latest round date

June 2026

Headquarters

Cambridge, Massachusetts

Notable investors

Third Rock Ventures, Nextech Invest, Pfizer Ventures, Boxer Capital, GordonMD Global Investments LP, Invus, Casdin Capital, Eli Lilly and Company

Frequently asked about Mersana Therapeutics funding

How much has Mersana Therapeutics raised?

Mersana Therapeutics has raised $85M in total disclosed funding across the rounds on record.

Who has invested in Mersana Therapeutics?

Third Rock Ventures, Nextech Invest, Pfizer Ventures, Boxer Capital, GordonMD Global Investments LP, Invus are named among the investors backing Mersana Therapeutics.

What was the latest Mersana Therapeutics funding round?

The most recent disclosed round is a Series C, announced in June 2026.

Where is Mersana Therapeutics based?

Mersana Therapeutics is based in Cambridge, Massachusetts.

When did Mersana Therapeutics last raise?

The last disclosed Mersana Therapeutics round closed in June 2026 at Series C.

Round data for Mersana Therapeutics is compiled from public filings and announcements; blank fields mean nothing has been disclosed rather than nothing exists. Continue with the companies in Cambridge and backer lists below.

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Company funding database · Investor directory · Founder database · Mega-rounds 2026