# Rune Energy funding: rounds and investors

> Rune Energy has raised $40M across 1 round since 2026. Investors include Spark Capital, Union Square Ventures and Lowercarbon Capital.

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

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

# Who invested in *Rune Energy*

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.

Follow Rune Energy and see its new rounds in your feed. [Sign up free](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Frune-energy)

AI

Raised 2 months ago

Funding summary Updated 27 Oct 2026

**$40M** raised across 1 round since 2026, from 1 source

- **Latest round:** Series A, $40M Sept 2026
- **Investors:** 3

See who backed them

## The rounds

- **Sept 2026** Series A **$40M** [Spark Capital](https://millionrounds.com/fund/spark-capital) [Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) [Lowercarbon Capital](https://millionrounds.com/fund/lowercarbon-capital) Source recorded

## Everyone who backed them

[Spark Capital](https://millionrounds.com/fund/spark-capital) VC firm **1** round

[Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) VC firm **1** round

[Lowercarbon Capital](https://millionrounds.com/fund/lowercarbon-capital) VC firm **1** round

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

## Quick answers about Rune Energy

### Who invested in Rune Energy?

Rune Energy's investors include Spark Capital, Union Square Ventures and Lowercarbon Capital.

### How much has Rune Energy raised?

Rune Energy has raised $40M across 1 round since 2026.

### When did Rune Energy last raise?

Rune Energy's most recent round was a Series A of $40M in Sept 2026.

### What was Rune Energy's biggest round?

Its most recent round, $40M in Sept 2026, is also its largest on record.

### Who backed Rune Energy first?

Rune Energy's first round on record, in Sept 2026, was backed by Spark Capital, Union Square Ventures and Lowercarbon Capital.

### What stage is Rune Energy at?

Rune Energy's latest named round is a Series A, in Sept 2026.

### Where is Rune Energy based?

Rune Energy is based in the United States.

## Companies like Rune Energy

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

[**Simile** $600M · Oct 2026](https://millionrounds.com/company/simile)[**Ayar Labs** $904M · Oct 2026](https://millionrounds.com/company/ayar-labs)[**Bedrock Robotics** $870M · Oct 2026](https://millionrounds.com/company/bedrock-robotics)[**Nevis** $105M · Oct 2026](https://millionrounds.com/company/nevis)[**Overwatch** $15M · Oct 2026](https://millionrounds.com/company/overwatch)[**Caju AI** $3.0M · Oct 2026](https://millionrounds.com/company/caju-ai)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app