# ClearFlame Engines funding: rounds and investors

> ClearFlame Engines has raised $30M across 1 round since 2023. Investors include National Science Foundation, Breakthrough Energy and Clean Energy Ventures.

Source: https://millionrounds.com/company/clearflame-engines (Millionrounds; every figure on the page links to its filing or article)

United States · [Series B startup](https://millionrounds.com/companies)

# Who invested in *ClearFlame Engines*

One round we have observed, with the 3 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Automotive & EVs

Funding summary Updated 26 Oct 2026

**$30M** raised across 1 round since 2023, from 1 source

- **Latest round:** Series B, $30M Mar 2023
- **Investors:** 3

See who backed them

## The rounds

- **Mar 2023** Series B **$30M** [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) [Clean Energy Ventures](https://millionrounds.com/fund/clean-energy-ventures) Source recorded SEC filing: $30M sold, first sale Nov 2022

## Founders and team

From the SEC filings it signed: 4 on the team.

- **Bernard Henry Johnson** Executive Officer, Director i
- **Craig Ann Barnes** Executive Officer i
- **Julie Ann Blumreiter** Executive Officer, Director i
- **Kirk Ann Roller** Executive Officer i

On the board, as filed i *Boris Ann Bystrov* *Daniel Ann Button* *John Ann Bobrowich*

## Everyone who backed them

[National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) Government **1** round

[Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) VC firm **1** round

[Clean Energy Ventures](https://millionrounds.com/fund/clean-energy-ventures) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=clearflame-engines).

## 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.

[IrishAngels](https://millionrounds.com/fund/irishangels) Angel network Per its own site

## Quick answers about ClearFlame Engines

### Who invested in ClearFlame Engines?

ClearFlame Engines's investors include National Science Foundation, Breakthrough Energy and Clean Energy Ventures.

### 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.

## Companies like ClearFlame Engines

In the same sector, and raised in the last eighteen months.

[**Applied Intuition** $640M · Oct 2026](https://millionrounds.com/company/applied-intuition)[**American Metal** $1.7M · Oct 2026](https://millionrounds.com/company/american-metal)[**Waymo** $27B · Oct 2026](https://millionrounds.com/company/waymo)[**Flai** $32M · Oct 2026](https://millionrounds.com/company/flai)[**Bloom** $418M · Oct 2026](https://millionrounds.com/company/bloom)[**Simple Energy** $199M · Sept 2026](https://millionrounds.com/company/simple-energy)

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