United States · 
Who invested in Spirox?
Spirox's investors include Correlation Ventures, Venrock, Western Technology Investment, Aisling Capital and Aperture Venture Partners.
20142015
$4.0MVenture$19MSeries BUnited States · Series B startup
Who invested in Spirox
2 rounds we have observed, with the 5 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 31 Oct 2026
$23Mraised across 2 rounds since 2013, from 2 sources
$4.0MVenture$19MSeries B
- Latest round
- Series B, $19MApr 2015
- Step-upi
- 4.6×
- Investors
- 5
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Venture, $4.0M Apr 2013
- Biggest round
- $19M Series B · Apr 2015
- Between rounds
- 2 years from the last two
The rounds
- Apr 2015Series B$19M4 new1 returning
From a historical funding recordSEC filing: $17M sold, first sale Apr 2015
- Apr 2013Venture$4.0M1 new
From a historical funding recordSEC filing: $5.8M sold, first sale Mar 2013
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
Aperture Venture PartnersVC firm1round
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Quick answers about Spirox
How much has Spirox raised?
Spirox has raised $23M across 2 rounds since 2013.
When did Spirox last raise?
Spirox's most recent round was a Series B of $19M in Apr 2015.
What was Spirox's biggest round?
Its most recent round, $19M in Apr 2015, is also its largest on record.
Who backed Spirox first?
Spirox's first round on record, in Apr 2013, was backed by Correlation Ventures.
What stage is Spirox at?
Spirox's latest named round is a Series B, in Apr 2015.
Where is Spirox based?
Spirox is based in the United States.
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