Castelion
Series CCastelion is a privately held company based in United States, founded in 2022. The latest disclosed round is Series C ($800m), dated Aug 19, 2026. Institutional investors on record include Andreessen Horowitz, General Catalyst, Lightspeed Venture Partners. Latest valuation on file is 13B (Aug 20, 2026).
United States · EST 2022
What is Castelion?
Castelion is a privately held company based in United States, founded in 2022. The latest disclosed round is Series C ($800m), dated Aug 19, 2026. Institutional investors on record include Andreessen Horowitz, General Catalyst, Lightspeed Venture Partners. Latest valuation on file is 13B (Aug 20, 2026). Defense company applying modern hardware development and manufacturing processes to national security challenges. CrackTheDeck lists dated rounds and linked fund profiles so founders can see who is already on the cap table before a pitch. Round sizes are shown only when disclosed. Empty fields mean the figure was not in those records. Open a fund name to read that firm's thesis, reported AUM, and recent dated deals. This page is compiled from financings linked to catalog funds. It is not a complete cap table. Founders use this card to check the latest disclosed round, amount, and syndicate before a meeting.
Which funds backed Castelion?
Who invested in Castelion?
Funds on the dated round table. Open a name to read the fund card.
| Investor | Round | Amount | Date |
|---|---|---|---|
| Andreessen Horowitz | Series C | $800m | Aug 19, 2026 |
| General Catalyst | Series C | $800m | Aug 19, 2026 |
| Lightspeed Venture Partners | Series C | $800m | Aug 19, 2026 |
What do founders ask about Castelion?
What is Castelion?
Castelion is a privately held company based in United States, founded in 2022. The latest disclosed round is Series C ($800m), dated Aug 19, 2026. Institutional investors on record include Andreessen Horowitz, General Catalyst, Lightspeed Venture Partners. Latest valuation on file is 13B (Aug 20, 2026). Defense company applying modern hardware development and manufacturing processes to national security challenges. CrackTheDeck lists dated rounds and linked fund profiles so founders can see who is already on the cap table before a pitch. Round sizes are shown only when disclosed. Empty fields mean the figure was not in those records. Open a fund name to read that firm's thesis, reported AUM, and recent dated deals. This page is compiled from financings linked to catalog funds. It is not a complete cap table. Founders use this card to check the latest disclosed round, amount, and syndicate before a meeting.
What was Castelion's last funding round?
Castelion's latest disclosed round is Series C at $800m (Aug 19, 2026).
Who invested in Castelion?
Castelion has 3 institutional investors on this page, including Andreessen Horowitz, General Catalyst, Lightspeed Venture Partners.
How does CrackTheDeck cover Castelion?
This startup card lists dated rounds and linked fund profiles so founders can see who is already in the cap table before a pitch.
How is this page compiled?
Round, amount, and investor names on the Castelion card come from dated financings linked to fund profiles in CrackTheDeck. Empty fields mean the figure was not in those records. Updated Aug 2026.