Castelion

United States
Torrance, California, United States

Company profile

Castelion company profile

Castelion is a venture-backed defense tech company applying modern hardware development and manufacturing processes to critical national security challenges, specifically to solve affordability, scale, and supply chain robustness. The company combines vertical integration, rapid iteration, and high-cadence testing to build hardware that is engineered from the ground up for scalable production. Castelion’s core offerings include solid-rocket motors, missile avionics, flight-control systems, seekers, and full strike-weapon assemblies, all designed for compatibility with existing military launch platforms.

Business identity

Contact email
[email protected]
Phone number
204-841-4390
Operating status
Active
Company type
For Profit
Employee range
101-250 employees
Founded
2022-01-01, Year

Headquarters

Country code
US
Continent
North America

Capital profile

Funding and company signals

Funding stage
Early Stage Venture
Funding rounds
5
Total equity funding
$439.6M
Last funding
Series B / $350M / 2025-12-05
Last equity funding
Series B / $350M
Investors
18
Lead investors
5
Founders
3
Articles
62

Founders and investors

Founders

Andrew KreitzBryon HargisSean Pitt

Lead investors

Altimeter CapitalAndreessen HorowitzLavrock VenturesLightspeed Venture PartnersSilicon Valley Bank

Investors

Altimeter CapitalAndreessen HorowitzGeneral CatalystLightspeed Venture PartnersValor Equity Partners