# 6K funding: rounds and investors

> 6K has raised $82M across 1 round since 2024. Investors include US Department of Energy, Energy Impact Partners and Anzu Partners. Every round with its source.

Source: https://millionrounds.com/company/6k (Millionrounds; every figure on the page links to its filing or article)

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

# Who invested in *6K*

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.

Biotech

Funding summary Updated 26 Oct 2026

**$82M** raised across 1 round since 2024, from 1 source

- **Latest round:** Series E, $82M Sept 2024
- **Investors:** 3

See who backed them

## The rounds

- **Sept 2024** Series E **$82M** [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) [Energy Impact Partners](https://millionrounds.com/fund/energy-impact-partners) [Anzu Partners](https://millionrounds.com/fund/anzu-partners) Source recorded

## Everyone who backed them

[US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Government **1** round

[Energy Impact Partners](https://millionrounds.com/fund/energy-impact-partners) VC firm **1** round

[Anzu Partners](https://millionrounds.com/fund/anzu-partners) Private equity **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=6k).

## 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.

[HG Ventures](https://millionrounds.com/fund/hg-ventures) Corporate VC Per its own site

[The Heritage Group Accelerator](https://millionrounds.com/fund/the-heritage-group-accelerator) Accelerator Per its own site

## Quick answers about 6K

### Who invested in 6K?

6K's investors include US Department of Energy, Energy Impact Partners and Anzu Partners.

### 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.

## Companies like 6K

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

[**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)

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