What is Castelion?
Headquartered in El Segundo, California, with facilities in Texas, Castelion is dedicated to drastically reducing the cost and time required to field new long-range strike weapons. The company's approach emphasizes rapid prototyping and iterative testing, with long-range flight demonstrations planned throughout 2025. Castelion's commitment to vertical integration and high-cadence testing positions it as a key player in modernizing defense capabilities.
How much funding has Castelion raised?
Castelion has raised a total of $464.2M across 3 funding rounds:
Other Financing Round
$14.2M
Series A
$100M
Series B
$350M
Other Financing Round (2023): $14.2M with participation from Andreessen Horowitz, Lavrock Ventures, Champion Hill Ventures, and BlueYard Capital
Series A (2025): $100M led by Andreessen Horowitz, BlueYard Capital, Cantos Ventures, and Lightspeed Venture Partners
Series B (2025): $350M supported by Altimeter Capital and Lightspeed Venture Partners
Key Investors in Castelion
Altimeter Capital
Altimeter Capital is an investment firm that partners with technology companies from early growth through public markets, focusing on concentrated, long-term portfolios and supporting product and strategy development.
Lightspeed Venture Partners
Lightspeed Venture Partners is a global multistage venture capital firm investing in early and growth-stage technology companies across various sectors, including enterprise software and infrastructure.
Andreessen Horowitz
Andreessen Horowitz is a venture capital firm that invests in both early-stage startups and established growth companies, headquartered in Menlo Park, California.
What's next for Castelion?
The substantial capital raised by Castelion, particularly the recent strategic investment, signals a strong market confidence in its disruptive approach to defense manufacturing. This financing is poised to accelerate the company's hardware development cycles and expand its testing infrastructure. As Castelion moves towards its planned flight demonstrations in 2025, this backing will be crucial for scaling production capabilities and solidifying its position in the defense sector, potentially leading to significant advancements in long-range strike weapon technology.
See full Castelion company page
