United States · 
Who invested in 6K?
6K's investors include US Department of Energy, Energy Impact Partners and Anzu Partners.
United States · Series E startup
Who invested in 6K
Funding summaryUpdated 26 Oct 2026
$82Mraised across 1 round since 2024, from 1 source
- Latest round
- Series E, $82MSept 2024
- Investors
- 3
The rounds
- Sept 2024
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 2 firms list 6K as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about 6K
How much has 6K raised?
6K has raised $82M across 1 round since 2024.
When did 6K last raise?
6K's most recent round was a Series E of $82M in Sept 2024.
What was 6K's biggest round?
Its most recent round, $82M in Sept 2024, is also its largest on record.
Who backed 6K first?
6K's first round on record, in Sept 2024, was backed by US Department of Energy, Energy Impact Partners and Anzu Partners.
What stage is 6K at?
6K's latest named round is a Series E, in Sept 2024.
Where is 6K based?
6K is based in the United States.
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In the same sector, and raised in the last eighteen months.
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