Castelion, a hypersonic missile startup founded by three SpaceX alumni, is targeting a massive $12 billion valuation in its latest funding round, fueled by Navy contracts and a new manufacturing campus in New Mexico. This marks one of the largest valuations for a defense-tech startup, reflecting surging investor interest in aerospace and military innovation. Castelion is founded in 2022 by SpaceX alumni Sean Pitt, Bryon Hargis, and Andrew Kreitz, focused on manufacturing hypersonic and long‐rang