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
Prints on record
2
Price range
▮
Latest print
Apr 2026
First print
Dec 2025
Pro
The prices on Castelion
·Every dated print: 2 trades with prices and structures
·1 investment vehicle formed around Castelion: sponsors, sizes, dates
Secondary marks are indicative month-end price levels observed across secondary-market trading venues — a level, not a trade — and are the market input to the PrivateMarketView mark. Private share prices aren’t published anywhere. Aggregate figures combine multiple reporting channels — direct participant reports, platform transactions, third-party market intelligence — at monthly granularity. Individually dated prints are a Pro feature and are shown only for transactions recorded on our own platform. Third-party-reported trades are never republished individually, at any tier. Verified prints (✓) have been confirmed against a second source. Prints marked SPV or Forward reflect the structure’s pricing, which can differ from direct share transfers of Castelion stock.
