United States · Growth startup
5 rounds we have observed, with the 12 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Funding summaryUpdated 26 Oct 2026
$107Mraised across 5 rounds since 2002, from 5 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Credit Suisse
Jennison Associates
Crocker VenturesReported by fiercebiotech.comSEC filing: $77M sold, first sale Apr 2011
GTC BiotherapeuticsFrom a historical funding record
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Expansion Venture CapitalCredit Suisse
University Venture FundJennison AssociatesCredit Suisse First Boston Next FundCrocker VenturesUnilever Technology VenturesGTC BiotherapeuticsTPG-Axon CapitalWharton CapitalFrom historical deal records. Wrong? Tell us.
Missing a round, or an investor who was in one? Tell us.
Merrimack Pharmaceuticals's investors include Expansion Venture Capital, Credit Suisse, University Venture Fund, Jennison Associates and Credit Suisse First Boston Next Fund, and 7 more on record.
Merrimack Pharmaceuticals has raised $107M across 5 rounds since 2002. 2 rounds did not disclose an amount, so the total is a floor.
Merrimack Pharmaceuticals's most recent round was a Growth of $77M in Apr 2011.
Its most recent round, $77M in Apr 2011, is also its largest on record.
Merrimack Pharmaceuticals's first round on record, in Jan 2002, was backed by Expansion Venture Capital.
Merrimack Pharmaceuticals's latest named round is a Growth, in Apr 2011.
Merrimack Pharmaceuticals is based in the United States.
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United States ·