United States · Funded startup
7 rounds we have observed, with the 9 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
$155Mraised across 7 rounds since 2006, from 7 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Reported by finsmes.com
Reported by masshightech.comSEC filing: $22M sold, first sale Nov 2012
No investor was named in the report.
Reported by masshightech.comSEC filing: $3.0M sold, first sale Aug 2012
Reported by eon.businesswire.comSEC filing: $6.1M sold, first sale Jun 2011
Reported by onbiovc.comSEC filing: $8.1M sold, first sale Feb 2010
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Atlas Venture
Third Rock Ventures
Alta Partners
GreatPoint Ventures
Venrock
RA Capital Management
Oxford Finance LLCBrookside Capital
MidCap FinancialMissing a round, or an investor who was in one? Tell us.
Zafgen's investors include Atlas Venture, Third Rock Ventures, Alta Partners, GreatPoint Ventures and Venrock, and 4 more on record.
Zafgen has raised $155M across 7 rounds since 2006.
Zafgen's most recent round was a Debt of $20M in Apr 2014.
Zafgen's largest round on record is $45M (Series E), in Dec 2013.
Zafgen's first round on record, in Sept 2006, was backed by Atlas Venture and GreatPoint Ventures.
Zafgen's latest named round is a Debt, in Apr 2014.
Zafgen is based in the United States.
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United States ·