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Castelion

United States · Defense / Hypersonics · private
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Summary

Low-cost, mass-producible hypersonic strike weapons; lead product Blackbeard is pitched as the first US hypersonic missile engineered from inception for industrial-rate output. Manufacturing spans New Mexico, Texas and California.

Notable

Series C investors include a16z, Carlyle, Lightspeed, General Catalyst, Altimeter and T. Rowe Price — a rare hypersonics-focused defense round at this scale.

Key facts

Headquarters
Torrance, California
Founded
2022
Role
builder
Category
Defense
Sector
Defense / Hypersonics
Status
private
CEO
Bryon Hargis
Founders
Bryon Hargis and co-founders
Funding
$1B Series C ($800M equity + $250M credit facility, Aug 2026)
Valuation
$13B