8 sources · first reported Yesterday

Hypersonic missile startup Castelion has raised $1 billion in Series C financing to scale production of its Blackbeard missile and develop longer-range and defensive weapons. The company, founded by former SpaceX executives, aims to produce low-cost hypersonic weapons and expand the US weapons capacity.
The investment in Castelion highlights the growing importance of hypersonic technology in modern defense systems, with potential applications in strike and missile defense capabilities.
How this story unfolded across sources, oldest first.