General Catalyst(@generalcatalyst):Congratulations to @Castelion on its $1B Series C to rebuild America's advanced hypersonic weapons and other forms of deterrence. Castelion credits Blackbeard as the first American hypersonic missile engineered from inception to be mass-produced at low cost, and reports taking it from a clean sheet to a program of record in under four years. We're proud to double down on our partnership with @hargsb, Sean Pitt, Andrew Kreitz, and the entire team.

2026.08.19 22:14

Congratulations to @Castelion on its $1B Series C to rebuild America's advanced hypersonic weapons and other forms of deterrence. Castelion credits Blackbeard as the first American hypersonic missile engineered from inception to be mass-produced at low cost, and reports taking it from a clean sheet to a program of record in under four years. We're proud to double down on our partnership with @hargsb, Sean Pitt, Andrew Kreitz, and the entire team.

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