# Castelion funding: rounds and investors > Castelion has raised $1.3B across 3 rounds since 2025. Investors include Lightspeed Venture Partners, Andreessen Horowitz and Altimeter. Source: https://millionrounds.com/company/castelion (Millionrounds; every figure on the page links to its filing or article) United States · [Series C startup](https://millionrounds.com/companies) # 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 & Space Defence Tech Drones Manufacturing Raised 2 months ago Follow Castelion and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fcastelion) Funding summary Updated 27 Oct 2026 **$1.3B** raised across 3 rounds since 2025, from 8 sources **$100M** Series A **$350M** Series B **$800M** Series C - **Latest round:** Series C, $800M Aug 2026 - **Led by:** Andreessen Horowitz and JP Morgan Chase and 2 more - **Step-up i:** 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. 2025 2026 **$100M** Series A **$350M** Series B **$800M** Series C - **First round:** Series A, $100M - **Biggest round:** $800M - **Usual gap between rounds:** 14 months ## The rounds - **Aug 2026** Series C **$800M** *4 new* *4 returning* [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) Lead [JP Morgan Chase](https://millionrounds.com/fund/j-p-morgan-chase) Lead [The Carlyle Group](https://millionrounds.com/fund/the-carlyle-group) Lead [JPMorgan Chase's Strategic Investment Group](https://millionrounds.com/fund/jpmorgan-chase-s-strategic-investment-group) Lead [General Catalyst](https://millionrounds.com/fund/general-catalyst) [Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) [Valor Equity Partners](https://millionrounds.com/fund/valor-equity-partners) [Altimeter](https://millionrounds.com/fund/altimeter-capital) Reported by Crunchbase News and 3 others SEC filing: $647M sold - **Jul 2025** Series B **$350M** *7 new* *5 returning* [Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) Lead [Altimeter](https://millionrounds.com/fund/altimeter-capital) Lead [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) [General Catalyst](https://millionrounds.com/fund/general-catalyst) [Battery Ventures](https://millionrounds.com/fund/battery-ventures) [Pritzker Group](https://millionrounds.com/fund/pritzker-group) [BlueYard Capital](https://millionrounds.com/fund/blueyard-capital) [Avenir](https://millionrounds.com/fund/avenir) [Interlagos](https://millionrounds.com/fund/interlagos) [Lavrock Ventures](https://millionrounds.com/fund/lavrock-ventures) [First In](https://millionrounds.com/fund/first-in) [Champion Hill](https://millionrounds.com/fund/champion-hill) Reported by TechCrunch and 2 others - **Jan 2025** Series A **$100M** *7 new* [Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) Lead [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) [BlueYard Capital](https://millionrounds.com/fund/blueyard-capital) [Cantos](https://millionrounds.com/fund/cantos) [Interlagos](https://millionrounds.com/fund/interlagos) [Lavrock Ventures](https://millionrounds.com/fund/lavrock-ventures) [First In Ventures](https://millionrounds.com/fund/first-in-ventures) Also list them on their own site [Flux Capital](https://millionrounds.com/fund/flux-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 A** 2025 **Series B** 2025 **Series C** 2026 [Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) L L [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) L [Altimeter](https://millionrounds.com/fund/altimeter-capital) L [General Catalyst](https://millionrounds.com/fund/general-catalyst) [BlueYard Capital](https://millionrounds.com/fund/blueyard-capital) [Interlagos](https://millionrounds.com/fund/interlagos) [Lavrock Ventures](https://millionrounds.com/fund/lavrock-ventures) [JP Morgan Chase](https://millionrounds.com/fund/j-p-morgan-chase) L [The Carlyle Group](https://millionrounds.com/fund/the-carlyle-group) L [JPMorgan Chase's Strategic Investment Group](https://millionrounds.com/fund/jpmorgan-chase-s-strategic-investment-group) L ## Everyone who backed them [Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) VC firm **3** rounds, led 2 [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) VC firm **3** rounds, led 1 [Altimeter](https://millionrounds.com/fund/altimeter-capital) VC firm **2** rounds, led 1 [General Catalyst](https://millionrounds.com/fund/general-catalyst) VC firm **2** rounds [BlueYard Capital](https://millionrounds.com/fund/blueyard-capital) VC firm **2** rounds [Interlagos](https://millionrounds.com/fund/interlagos) VC firm **2** rounds [Lavrock Ventures](https://millionrounds.com/fund/lavrock-ventures) VC firm **2** rounds [JP Morgan Chase](https://millionrounds.com/fund/j-p-morgan-chase) Corporate VC **1** round, led 1 [The Carlyle Group](https://millionrounds.com/fund/the-carlyle-group) Private equity **1** round, led 1 [JPMorgan Chase's Strategic Investment Group](https://millionrounds.com/fund/jpmorgan-chase-s-strategic-investment-group) Growth equity **1** round, led 1 [Battery Ventures](https://millionrounds.com/fund/battery-ventures) VC firm **1** round [Valor Equity Partners](https://millionrounds.com/fund/valor-equity-partners) VC firm **1** round [Pritzker Group](https://millionrounds.com/fund/pritzker-group) Private equity **1** round [Cantos](https://millionrounds.com/fund/cantos) VC firm **1** round [Avenir](https://millionrounds.com/fund/avenir) VC firm **1** round [First In](https://millionrounds.com/fund/first-in) VC firm **1** round [First In Ventures](https://millionrounds.com/fund/first-in-ventures) VC firm **1** round [Champion Hill](https://millionrounds.com/fund/champion-hill) Growth equity **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=castelion). ## 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 Capital](https://millionrounds.com/fund/ambition-capital-2) VC firm Per its own site [Angel Collective](https://millionrounds.com/fund/angel-collective) Fund of funds Per its own site [GrayArch Partners](https://millionrounds.com/fund/grayarch-partners) VC firm Per its own site [Jackson Moses](https://millionrounds.com/fund/jackson-moses) Angel Per its own site [Champion Hill Ventures](https://millionrounds.com/fund/champion-hill-ventures) VC firm Per its own site [Flux Capital](https://millionrounds.com/fund/flux-capital) VC firm Series A, per its site [Forward Deployed Venture Capital](https://millionrounds.com/fund/forward-deployed-venture-capital) VC firm Per its own site [IceNine](https://millionrounds.com/fund/icenine) VC firm Per its own site [Tides Ventures](https://millionrounds.com/fund/tides-ventures) VC firm Per its own site [Unmatched Ventures](https://millionrounds.com/fund/unmatched-ventures) VC firm Per 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. ### How much has Castelion raised? Castelion has raised $1.3B across 3 rounds since 2025. ### When did Castelion last raise? Castelion's most recent round was a Series C of $800M in Aug 2026, led by Andreessen Horowitz. ### What was Castelion's biggest round? Its most recent round, $800M in Aug 2026, is also its largest on record. ### Who backed Castelion first? Castelion's first round on record, in Jan 2025, was backed by Lightspeed Venture Partners, Andreessen Horowitz and BlueYard Capital and 4 others. ### What stage is Castelion at? Castelion's latest named round is a Series C, in Aug 2026. ### Where is Castelion based? Castelion is based in the United States. ### Who led Castelion's rounds? Lightspeed Venture Partners led the Series A in 2025; Andreessen Horowitz led the Series C in 2026. ## Companies like Castelion In the same sector, and raised in the last eighteen months. [**Ayar Labs** $904M · Oct 2026](https://millionrounds.com/company/ayar-labs)[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**Apex** $1.1B · Oct 2026](https://millionrounds.com/company/apex)[**Xona** $512M · Oct 2026](https://millionrounds.com/company/xona)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**ZwitterCo** $58M · Oct 2026](https://millionrounds.com/company/zwitterco) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app