United States · 
Who invested in Arkenstone Defense?
Arkenstone Defense's investors include J2 Ventures, Susa Ventures, Artis Ventures (AV) and Granite Hill Capital Partners. J2 Ventures led its latest round.
United States · Seed startup
Who invested in Arkenstone Defense
One round we have observed, with the 4 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 4 months ago
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Funding summaryUpdated 5 Nov 2026
$35Mraised across 1 round since 2026, from 1 source
- Latest round
- Seed, $35MJul 2026
- Led by
- J2 Ventures
- Investors
- 4 (1 led)
The rounds
- Jul 2026Seed$35M
Reported by Ventureburn
Funding filed with regulators
Arkenstone Defense filed 2 raises, $8.6M in all. Filings say how much was sold and to how many investors; they never name the investors.
- Jul 2025$600KSEC Form D
- Apr 2025$8.0MSEC Form D
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
This firm lists Arkenstone Defense as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Arkenstone Defense
How much has Arkenstone Defense raised?
Arkenstone Defense has raised $35M across 1 round since 2026.
When did Arkenstone Defense last raise?
Arkenstone Defense's most recent round was a Seed of $35M in Jul 2026, led by J2 Ventures.
What was Arkenstone Defense's biggest round?
Its most recent round, $35M in Jul 2026, is also its largest on record.
Who backed Arkenstone Defense first?
Arkenstone Defense's first round on record, in Jul 2026, was backed by J2 Ventures, Susa Ventures and Artis Ventures (AV) and 1 others.
What stage is Arkenstone Defense at?
Arkenstone Defense's latest named round is a Seed, in Jul 2026.
Where is Arkenstone Defense based?
Arkenstone Defense is based in the United States.
Who led Arkenstone Defense's rounds?
J2 Ventures led the Seed in 2026.
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