Mach Industries

Mach Industries raised a $300M Series C on 1 June 2026 at a $1.8 billion valuation, a 4x step-up from twelve months earlier, cementing its status as one of the fastest-growing defence startups in the United States. The round was co-led by Infinite Capital and Ribbit Capital, with Sequoia Capital, Khosla Ventures and Bedrock Capital participating. On the same day Mach announced the acquisition of solid-rocket-motor firm Exquadrum for $50M, rebranding it as Mach Energetics and gaining a 70,000-square-foot propulsion facility in Adelanto, California. A sixth vehicle programme (a Runway-independent Navy strike aircraft commissioned by the Defense Innovation Unit) followed within days.

Founded in 2023 by Ethan Thornton, a MIT dropout from West Texas, the company is headquartered in Huntington Beach, California in a 115,000-square-foot factory. Its five vehicle programmes span the attack-to-defence spectrum: Viper (jet-powered VTOL strike), Glide (high-altitude glider weapons launcher), Stratos (airborne surveillance), Dart (low-cost counter-drone interceptor) and Pike (long-range munition platform). Production on at least three systems is scheduled for 2026. The Exquadrum deal addressed a critical bottleneck: domestic solid-rocket-motor manufacturing had consolidated to just two suppliers, Aerojet Rocketdyne and Northrop Grumman, creating lead times of seven to ten months for tactical munitions.

Mach represents the maturing of defence-tech venture capital from a niche curiosity into a standalone capital category. Its backers include firms more associated with fintech and consumer software than weapons programmes, signalling broad institutional appetite for dual-use autonomy. The company competes directly with legacy primes on speed-to-production and unit cost, and its vertical integration of propulsion (rare among startups) gives it a supply-chain moat that rivals cannot replicate quickly.