Who invested in Castelion

3 rounds we have observed, with the 18 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Aerospace & SpaceDefence TechDronesManufacturing

Raised 2 months ago

Funding summaryUpdated 26 Oct 2026

$1.3Braised across 3 rounds since 2025, from 8 sources

$100MSeries A$350MSeries B$800MSeries C

Latest round: Series C, $800MAug 2026
Led by: Andreessen Horowitz and JP Morgan Chaseand 2 more
Step-upi: 2.3×
Investors: 18 (6 led)

See who backed them

The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

20252026

$100MSeries A$350MSeries B$800MSeries C

First round: Series A, $100M
Biggest round: $800M
Usual gap between rounds: 14 months

The rounds

Aug 2026
Series C$800M4 new4 returning
Reported by Crunchbase News and 3 othersSEC filing: $647M sold
Jul 2025
Series B$350M7 new5 returning
Reported by TechCrunch and 2 others
Jan 2025
Series A$100M7 new
Also list them on their own siteFlux Capital
Reported by Crunchbase News

Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

Series A2025Series B2025Series C2026

Lightspeed Venture PartnersLL

The Carlyle GroupLJPMorgan Chase's Strategic Investment GroupL

Everyone who backed them

Lightspeed Venture PartnersVC firm3rounds, led 2

Andreessen HorowitzVC firm3rounds, led 1

AltimeterVC firm2rounds, led 1

General CatalystVC firm2rounds

BlueYard CapitalVC firm2rounds

InterlagosVC firm2rounds

Lavrock VenturesVC firm2rounds

JP Morgan ChaseCorporate VC1round, led 1

The Carlyle GroupPrivate equity1round, led 1

JPMorgan Chase's Strategic Investment GroupGrowth equity1round, led 1

Battery VenturesVC firm1round

Valor Equity PartnersVC firm1round

Pritzker GroupPrivate equity1round

CantosVC firm1round

AvenirVC firm1round

First InVC firm1round

First In VenturesVC firm1round

Champion HillGrowth equity1round

Missing a round, or an investor who was in one? Tell us.

Also claim to have backed them

These 10 firms list Castelion 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.

Ambition CapitalVC firmPer its own site

Angel CollectiveFund of fundsPer its own site

GrayArch PartnersVC firmPer its own site

Jackson MosesAngelPer its own site

Champion Hill VenturesVC firmPer its own site

Flux CapitalVC firmSeries A, per its site

Forward Deployed Venture CapitalVC firmPer its own site

IceNineVC firmPer its own site

Tides VenturesVC firmPer its own site

Unmatched VenturesVC firmPer its own site

Quick answers about Castelion

Who invested in Castelion?

Castelion's investors include Lightspeed Venture Partners, Andreessen Horowitz, Altimeter, General Catalyst and BlueYard Capital, and 13 more on record. Andreessen Horowitz led its latest round.