Castelion has successfully raised $350 million in Series B funding, building on a previous $100 million Series A round. Founded by former SpaceX executives, the company aims to revolutionize hypersonic missile production amidst growing concerns about China's advancements in this area. Their strategy involves rapidly developing and testing systems while integrating technology to cut costs. Castelion has received support from various Department of Defense offices and has appeared in the U.S. Army's budget request, highlighting the urgent need for affordable hypersonic weapons like the Blackbeard project.
Castelion has raised a $350 million Series B led by Lightspeed Venture Partners and Altimeter Capital, aiming to transform the production of hypersonic missile systems.
The company is taking a similar approach to SpaceX: build quickly, test frequently, and vertically integrate to drive down costs while winning grants from DoD offices.
Military leaders are concerned about China's rapidly advancing hypersonic capabilities, prompting Castelion's push for affordable, mass-produced hypersonic weapons like the Blackbeard Ground Launch.
The U.S. Army's fiscal year 2026 budget requested $25 million for Project HX3 to develop and test an "affordable, mass-produced hypersonic weapon" called Blackbeard.
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