Mach Industries, a defense technology startup led by 22-year-old CEO Ethan Thornton, raised $600 million in a Series C extension this month, valuing the company at $3.7 billion. This latest raise more than doubles the $1.8 billion valuation from just three months earlier when Mach secured $300 million in its initial Series C round, according to fortune.com.
Founded in 2023 by Thornton at age 19, Mach Industries has quickly gained traction by focusing on autonomous defense systems. The Series C extension was backed by Ribbit Capital, Infinite Capital, Bedrock Capital, and Sequoia Capital. Thornton emphasized the importance of moving fast and adapting, stating that waiting for all answers before starting is unrealistic. The company now operates six weapons programs and has a 115,000-square-foot headquarters and manufacturing facility in Huntington Beach, California.
Mach’s rapid valuation growth reflects increasing investor interest in defense technology startups, particularly those innovating in autonomous systems. The company secured a deal with the Army Applications Laboratory in 2024 to develop a vertical-takeoff precision cruise missile, highlighting its strategic partnerships. Mach’s ambitions extend to building airframes, jet engines, solid rocket motors, and energetic systems, positioning it as a notable player in the defense sector backed by prominent venture capital firms.
Mach Industries’ latest funding round underscores its accelerated growth trajectory and expanding capabilities. The company’s six active weapons programs and large manufacturing facility support its goal to advance autonomous defense technologies. The $600 million Series C extension was announced earlier this month, marking a significant milestone in Mach’s development.