El Segundo, CA · Founded 2022 · Privately Held (backing)
Manufacturer of advanced hypersonic weapon systems designed to strengthen conventional deterrence through rapid, scalable production. Castelion is based in El Segundo, CA and was founded in 2022. It was valued at $2.8 billion at its early-stage round in Dec 2025, the last priced event on record. It has raised $464 million across 3 recorded rounds; the latest was a $360 million later-stage round in Aug 2025.
PMV mark · valuation
$2.8B
Oct 2026
Priced at
its early-stage round
Dec 2025
Total raised
$464.1M
Last round
Later Stage VC
Aug 2025
Team — not yet on record
No current team members for Castelion are on record yet. People surface from round filings, company disclosures, and coverage sessions.
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·The complete investor list: 26 names
·Watch Castelion: the Monday email on marks, rounds and moves
