United States · 
Who invested in PhaseRx?
PhaseRx's investors include ARCH Venture Partners, Versant Ventures and 5AM Ventures.
200820092010201120122013
$20MSeries A$303KSeries A$3.6MDebt$1.5MDebt$1.4MDebtUnited States · Funded startup
Who invested in PhaseRx
5 rounds we have observed, with the 3 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.
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Funding summaryUpdated 15 Nov 2026
$27Mraised across 5 rounds since 2008, from 5 sources
$20MSeries A
- Latest round
- Debt, $1.4MOct 2013
- Biggest round
- $20MSeries A · Feb 2008
- Investors
- 3
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series A, $20M Feb 2008
- Biggest round
- $20M Series A · Feb 2008
- Usual gap between rounds
- 18 months the median of 4
The rounds
- Oct 2013Debt$1.4M
No investor was named in the report.
Reported by sec.govSEC filing: $1.4M sold, first sale Sept 2013
- Dec 2012Debt$1.5M
No investor was named in the report.
Reported by sec.govSEC filing: $1.5M sold, first sale Dec 2012
- Feb 2012Debt$3.6M
No investor was named in the report.
Reported by sec.govSEC filing: $3.6M sold, first sale Feb 2012
- Aug 2009Series A$303K
No investor was named in the report.
From a historical funding recordSEC filing: $303K sold, first sale Aug 2009
- Feb 2008
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about PhaseRx
How much has PhaseRx raised?
PhaseRx has raised $27M across 5 rounds since 2008.
When did PhaseRx last raise?
PhaseRx's most recent round was a Debt of $1.4M in Oct 2013.
What was PhaseRx's biggest round?
PhaseRx's largest round on record is $20M (Series A), in Feb 2008.
Who backed PhaseRx first?
PhaseRx's first round on record, in Feb 2008, was backed by ARCH Venture Partners, Versant Ventures and 5AM Ventures.
What stage is PhaseRx at?
PhaseRx's latest named round is a Debt, in Oct 2013.
Where is PhaseRx based?
PhaseRx is based in the United States.
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