United States · 
Who invested in Eos Energy Storage?
Eos Energy Storage's investors include NRG Energy, AltEnergy, LLC and Fisher Brothers.
20142015
$15MSeries B$2.1MVenture$23MSeries CUnited States · Series C startup
Who invested in Eos Energy Storage
3 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 1 Nov 2026
$40Mraised across 3 rounds since 2013, from 3 sources
$15MSeries B$2.1MVenture$23MSeries C
- Latest round
- Series C, $23MMay 2015
- Step-upi
- 11×
- 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 B, $15M May 2013
- Biggest round
- $23M Series C · May 2015
- Usual gap between rounds
- 19 months the median of 2
The rounds
- May 2015
- Dec 2014Venture$2.1M
No investor was named in the report.
From a historical funding recordSEC filing: $2.5M sold, first sale Nov 2014
- May 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
Missing a round, or an investor who was in one? Tell us.
Quick answers about Eos Energy Storage
How much has Eos Energy Storage raised?
Eos Energy Storage has raised $40M across 3 rounds since 2013.
When did Eos Energy Storage last raise?
Eos Energy Storage's most recent round was a Series C of $23M in May 2015.
What was Eos Energy Storage's biggest round?
Its most recent round, $23M in May 2015, is also its largest on record.
Who backed Eos Energy Storage first?
Eos Energy Storage's first round on record, in May 2013, was backed by NRG Energy.
What stage is Eos Energy Storage at?
Eos Energy Storage's latest named round is a Series C, in May 2015.
Where is Eos Energy Storage based?
Eos Energy Storage is based in the United States.
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