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CASTELION
Castelion
Aerospace & Defense · Torrance, California · United States · Founded · 2022 · ≈ · 225 · employees

Castelion Valuation: $13B After the Aug 2026 Series C

Private

Castelion was last valued at $2.8B (post-money). It comes from the Series C of Aug 2026. The company is private, so there is no listed share price.

ProfileValuationFundingCompetitorsStock & IPOHow to invest
Castelion valuation · at a glance
Last valuation
$2.8B
POST-MONEY
Lead investors
5
across 4 rounds
Raised across rounds
$434.2M
4 rounds
Date of last round
Aug 2026
closed 19 Aug 2026
Valuation history

How the Castelion valuation has moved

1 valuation. The latest, $13B post-money, was set by the Series C in Aug 2026.

Latest valuation
$13Bpost-money
Set by the Series C · 19 Aug 2026
Valuations
1
Priced rounds with a valuation
Event type
Primary round
The Series C
Undated: Series B at $2.8B (post-money); Series A at —; Series Seed at —.
Funding rounds

Castelion rounds and the valuation each one set

4 rounds
Round
Date
Amount
Valuation
Basis
Series C LATEST
19 Aug 2026
—
$13B
POST-MONEY
Series B
—
$350M
$2.8B
POST-MONEY
Series A
—
$70M
—
—
Series Seed
—
$14.2M
—
—
Lead investors
Leads: Andreessen Horowitz, Carlyle, JPMorganChase Strategic Investment Group, Lavrock Ventures, Lightspeed Venture Partners.
Full funding history — Castelion profile ›
What the valuation means

What the $2.8B actually measures

A private valuation is the price agreed in one transaction. The Castelion valuation of $2.8B is a post-money figure from the Series C dated 19 Aug 2026 .

The valuation holds until the next priced round or secondary sale. A private company founded in 2022 with roughly 225 people has no daily price and no order book between rounds.

Where the $2.8B comes from
EventSeries C, dated 19 Aug 2026
Basispost-money
LeadJPMorganChase Strategic Investment Group, Andreessen Horowitz, Carlyle

Frequently asked questions

Who are Castelion's competitors?›

The closest aerospace & defense peers are on the competitors page.

How can I get exposure to Castelion?›

The routes section explains what is realistically available for a company at this stage.

Is Castelion publicly traded?›

No. Castelion is a private company; its shares do not trade on a public exchange.

What is Castelion's valuation?›

The last valuation is $2.8B.

Who has invested in Castelion?›

Lead investors for each round are in the funding timeline.

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