Mach Industries, the three-year-old US defence-tech startup founded by 22-year-old Ethan Thornton, has raised a $300M Series C at a $1.8bn valuation, nearly 4x its June 2025 mark.

In a wild ride for 22-year-old founder and CEO Ethan Thornton, Mach Industries has raised another $300 million. It already has five autonomous vehicles in development and…

Mach Industries, the three-year-old US defence-tech startup founded by 22-year-old Ethan Thornton, has raised a $300M Series C at a $1.8bn valuation, nearly 4x its June 2025 mark.