# Arinna funding: rounds and investors

> Arinna has raised $4.0M across 1 round since 2026. Investors include Spacecadet, FJ Labs and Breakthrough Energy. Every round with its source.

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

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

# Who invested in *Arinna*

One round we have observed, with the 5 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.

Aerospace & Space Cleantech Energy Hardware & Electronics

Raised 8 months ago

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Funding summary Updated 15 Nov 2026

**$4.0M** raised across 1 round since 2026, from 1 source

- **Latest round:** Seed, $4.0M Mar 2026
- **Led by:** Spacecadet
- **Investors:** 5 (1 led)

See who backed them

## The rounds

- **Mar 2026** Seed **$4.0M** [Spacecadet](https://millionrounds.com/fund/spacecadet) Lead [FJ Labs](https://millionrounds.com/fund/fj-labs) [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) [Anorak Ventures](https://millionrounds.com/fund/anorak-ventures) [Breakthrough Energy Foundation](https://millionrounds.com/fund/breakthrough-energy-foundation) Reported by TechCrunch

## Funding filed with regulators

Arinna filed 2 raises, $400K in all. Filings say how much was sold and to how many investors; they never name the investors.

- May 2016 **$120K** 2 investors equity of $1.0M offered SEC Form D
- May 2015 **$280K** 3 investors debt of $1.2M offered SEC Form D

## Founders and team

From the SEC filings it signed: 2 on the team.

- **Cliff Kaehler** Executive Officer, Director, Promoter i
- **Mark Margiotta** Executive Officer, Director i

On the board, as filed i *George Peichel* *Ralph Kaehler* *Vince Robinson*

## Everyone who backed them

[Spacecadet](https://millionrounds.com/fund/spacecadet) VC firm **1** round, led 1

[FJ Labs](https://millionrounds.com/fund/fj-labs) VC firm **1** round

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

[Anorak Ventures](https://millionrounds.com/fund/anorak-ventures) VC firm **1** round

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

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

## Also claim to have backed them

These 2 firms list Arinna 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.

[Rpv](https://millionrounds.com/fund/rpv) VC firm Per its own site

[Resilient Systems Capital](https://millionrounds.com/fund/resilient-systems-capital) Investment firm Per its own site

## Quick answers about Arinna

### Who invested in Arinna?

Arinna's investors include Spacecadet, FJ Labs, Breakthrough Energy, Anorak Ventures and Breakthrough Energy Foundation. Spacecadet led its latest round.

### How much has Arinna raised?

Arinna has raised $4.0M across 1 round since 2026.

### When did Arinna last raise?

Arinna's most recent round was a Seed of $4.0M in Mar 2026, led by Spacecadet.

### What was Arinna's biggest round?

Its most recent round, $4.0M in Mar 2026, is also its largest on record.

### Who backed Arinna first?

Arinna's first round on record, in Mar 2026, was backed by Spacecadet, FJ Labs and Breakthrough Energy and 2 others.

### What stage is Arinna at?

Arinna's latest named round is a Seed, in Mar 2026.

### Where is Arinna based?

Arinna is based in the United States.

### Who led Arinna's rounds?

Spacecadet led the Seed in 2026.

## Companies like Arinna

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

[**VulcanForms** $720M · Nov 2026](https://millionrounds.com/company/vulcanforms)[**Soofa** Nov 2026](https://millionrounds.com/company/soofa)[**Luminal** $28M · Nov 2026](https://millionrounds.com/company/luminal)[**New ERA Energy & Digital** $354M · Nov 2026](https://millionrounds.com/company/new-era-energy-and-digital)[**Coreshell Technologies** $54M · Nov 2026](https://millionrounds.com/company/coreshell-technologies)[**Atomarine** $20M · Nov 2026](https://millionrounds.com/company/atomarine)

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