United States · 
Who invested in ClearFlame Engines?
ClearFlame Engines's investors include National Science Foundation, Breakthrough Energy and Clean Energy Ventures.
United States · Series B startup
Who invested in ClearFlame Engines
Funding summaryUpdated 26 Oct 2026
$30Mraised across 1 round since 2023, from 1 source
- Latest round
- Series B, $30MMar 2023
- Investors
- 3
The rounds
- Mar 2023Series B$30M
Source recordedSEC filing: $30M sold, first sale Nov 2022
Founders and team
From the SEC filings it signed: 4 on the team.
- Bernard Henry JohnsonExecutive Officer, Directori
- Craig Ann BarnesExecutive Officeri
- Julie Ann BlumreiterExecutive Officer, Directori
- Kirk Ann RollerExecutive Officeri
On the board, as filediBoris Ann BystrovDaniel Ann ButtonJohn Ann Bobrowich
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
This firm lists ClearFlame Engines as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.
Quick answers about ClearFlame Engines
How much has ClearFlame Engines raised?
ClearFlame Engines has raised $30M across 1 round since 2023.
When did ClearFlame Engines last raise?
ClearFlame Engines's most recent round was a Series B of $30M in Mar 2023.
What was ClearFlame Engines's biggest round?
Its most recent round, $30M in Mar 2023, is also its largest on record.
Who backed ClearFlame Engines first?
ClearFlame Engines's first round on record, in Mar 2023, was backed by National Science Foundation, Breakthrough Energy and Clean Energy Ventures.
What stage is ClearFlame Engines at?
ClearFlame Engines's latest named round is a Series B, in Mar 2023.
Where is ClearFlame Engines based?
ClearFlame Engines is based in the United States.
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