United States · Growth startup

Who invested in Joule Unlimited

5 rounds we have observed, with the 2 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

$240Mraised across 5 rounds since 2010, from 5 sources

$30MSeries B$70MSeries C$50MSeries D$50MSeries C$40MGrowth

Latest round: Growth, $40MMay 2015
Biggest round: $70MSeries C · Jan 2012
Investors: 2

See who backed them

The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

201020112012201320142015

$30MSeries B$70MSeries C$50MSeries D$50MSeries C$40MGrowth

First round: Series B, $30M
Biggest round: $70M
Usual gap between rounds: 21 months

The rounds

May 2015
Growth$40M
No investor was named in the report.
From a historical funding record
Aug 2013
Series D$50M
No investor was named in the report.
From a historical funding record
Aug 2013
Series C$50M
No investor was named in the report.
Reported by xconomy.com
Jan 2012
Series C$70M1 new
- Flagship Ventures
Reported by jouleunlimited.com
Apr 2010
Series B$30M1 new
- Flagship Pioneering, LLC
Reported by jouleunlimited.com

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.

Series B2010Series C2012Series D2013Series C2013Growth2015Flagship Pioneering, LLCFlagship Ventures

Everyone who backed them

Flagship Pioneering, LLCVC firm1round

Flagship VenturesAccelerator1round

Missing a round, or an investor who was in one? Tell us.

Quick answers about Joule Unlimited