@Lightspeed first partnered with @hargsb, @sean_pitt_ and Andrew Kreitz in 2024. Today, we’re tripling down on Castelion as part of its $1B Series C. Building defense systems at scale requires moving quickly from test to production while keeping unit costs down. Castelion has built around both. Design, flight testing and manufacturing run as one continuous process, so what the team learns on the range can go directly into the next build. The first system Blackbeard, is already below $500K per unit, having gone from a clean-sheet design to a U.S. military program of record in 2.5 years. We’re excited to triple down on the Castelion team as they apply their years of experience scaling hardware production at SpaceX to additional strike and defensive systems. cc @ravi_lsvp, Prathik hosalli