Mach Industries, founded by 22-year-old Ethan Thornton, has successfully raised $300 million in a Series C funding round, elevating its valuation to $1.8 billion. This marks a significant increase from its previous valuation of $470 million in June 2025. The funding round was led by Infinite Capital and Ribbit Capital, reflecting strong investor interest in the defense tech sector, particularly in light of advancements in autonomous weapons and drone technology. The company, based in Huntington Beach, California, is currently developing five autonomous vehicles, including the Viper, a jet-powered vertical takeoff vehicle, and Glide, a high-altitude glider. Production for at least three of these vehicles is expected to commence next year. Additionally, Mach secured a contract from the Department of Defense to create a new strike aircraft, further solidifying its position in the industry. The recent acquisition of Exquadrum, a solid rocket motor startup, for $50 million has also positioned Mach to better control its supply chain and expand its commercial offerings. With a workforce that has grown from 12 to 350 employees and plans for additional production facilities, Mach is poised for continued growth in the defense sector.