The funding round is expected to close in February. Castelion is developing a mass-producible, long-range hypersonic weapon using rapid iterative design cycles, agile hardware development and ...

Now, Castelion – a new manufacturer in the defense industry — is developing affordable, mass-produced hypersonic weapons to safeguard America and its allies. The California-based startup ...

Silicon Valley’s enthusiasm for superfast weapons has picked up speed, with defense-tech startup Castelion raising $100 million through debt and equity to build hypersonic missile systems.