United States · Series C startup
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.
Raised 3 months ago
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Funding summaryUpdated 5 Nov 2026
$1.3Braised across 3 rounds since 2025, from 8 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Andreessen HorowitzLead
JP Morgan ChaseLead
The Carlyle GroupLead
General Catalyst
Lightspeed Venture Partners
Valor Equity Partners
AltimeterReported by Crunchbase News and 3 othersSEC filing: $647M sold
Lightspeed Venture PartnersLeadAltimeterLeadAndreessen HorowitzGeneral Catalyst
Battery Ventures
Pritzker Group
BlueYard Capital
Avenir
Interlagos
Lavrock Ventures
First InReported by TechCrunch and 2 others
Lightspeed Venture PartnersLeadAndreessen HorowitzBlueYard Capital
CantosInterlagosLavrock Ventures
First In VenturesAlso list them on their own siteFlux Capital
Reported by Crunchbase News
Castelion filed 4 raises, $1.1B in all. Filings say how much was sold and to how many investors; they never name the investors.
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
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These 12 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.
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.
Castelion has raised $1.3B across 3 rounds since 2025.
Castelion's most recent round was a Series C of $800M in Aug 2026, led by Andreessen Horowitz.
Its most recent round, $800M in Aug 2026, is also its largest on record.
Castelion's first round on record, in Jan 2025, was backed by Lightspeed Venture Partners, Andreessen Horowitz and BlueYard Capital and 4 others.
Castelion's latest named round is a Series C, in Aug 2026.
Castelion is based in the United States.
Lightspeed Venture Partners led the Series A in 2025; Andreessen Horowitz led the Series C in 2026.
In the same sector, and raised in the last eighteen months.
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United States · 
