Castelion Raises $1 Billion at $13 Billion Valuation to Scale Hypersonic Weapon Production
Castelion has raised $1 billion at a $13 billion valuation, just four years after three SpaceX executives left to build missiles. The company’s bet is that hypersonic weapons are more of a manufacturing problem than an engineering one.
The Navy has placed orders for 50 pre-production prototypes.
Funding Details
Castelion secured the funding through a combination of $800 million in equity and $250 million of committed financing for a revolving credit facility, according to the company. T. Rowe Price was a new investor in the round, while JPMorganChase’s Strategic Investment Group co-led with Andreessen Horowitz and funds managed by Carlyle. Other returning investors included Lightspeed, Lavrock Ventures, Altimeter, General Catalyst, and Interlagos.
The Manufacturing Focus
The company doesn’t claim to build a better missile than Lockheed Martin or RTX. Instead, Castelion focuses on manufacturing efficiency, aiming to produce thousands of weapons at low cost by mimicking SpaceX’s factory operations.
“Very few teams convert capital into physical capability at that ratio,” noted Ravi Mhatre from Lightspeed, which led the Series A round before a complete system had flown.
Pentagon Contracts and Future Plans
Castelion has secured over $500 million in US military contracts in the past 18 months. They’ve developed Blackbeard, their hypersonic strike weapon, from concept to program of record in under four years, with fielding targeted for 2027.
A significant contract was awarded by the US Navy in June, worth $23.4 million, covering 50 pre-production prototypes and associated storage and shipping containers.
This round strengthens Andreessen Horowitz’s investment thesis in American Dynamism, which also backs Anduril and Hadrian, companies focused on automated manufacturing for defense applications.