United States · 
Who invested in Arinna?
Arinna's investors include Spacecadet, FJ Labs, Breakthrough Energy, Anorak Ventures and Breakthrough Energy Foundation. Spacecadet led its latest round.
United States · Seed startup
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.
Raised 8 months ago
Follow Arinna and see its new rounds in your feed. Start following
Funding summaryUpdated 15 Nov 2026
$4.0Mraised across 1 round since 2026, from 1 source
- Latest round
- Seed, $4.0MMar 2026
- Led by
- Spacecadet
- Investors
- 5 (1 led)
The rounds
- Mar 2026Seed$4.0M
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$120KSEC Form D
- May 2015$280KSEC Form D
Founders and team
From the SEC filings it signed: 2 on the team.
- Cliff KaehlerExecutive Officer, Director, Promoteri
- Mark MargiottaExecutive Officer, Directori
On the board, as filediGeorge PeichelRalph KaehlerVince Robinson
Everyone who backed them
Breakthrough Energy FoundationVC firm1round
Missing a round, or an investor who was in one? Tell us.
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.
Quick answers about Arinna
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.
Find investors like these
Search every investor by what they have actually funded, then narrow to your stage and market. Free.