Mach Industries, the Huntington Beach-based defense technology startup, has closed a $300 million Series C round at a $1.8 billion valuation nearly quadrupling its valuation in under a year. The round was led by deep tech fund Infinite Capital and Ribbit Capital, with participation from Bedrock Capital, Sequoia Capital, and Khosla Ventures.
The raise is a striking signal of investor conviction in the autonomous weapons and drone defense sector. Just twelve months ago, the company closed its Series B at a $470 million valuation. The new round was originally targeted at $200 million but was heavily oversubscribed, prompting the company to upsize to $300 million and still close oversubscribed.
“We went out to raise $200 million and we were extremely oversubscribed at $200 and happy with the price, so we decided to push up to $300,” said founder and CEO Ethan Thornton. “We’re still oversubscribed at the $300 mark.”
Rapid Scaling Across Product, Headcount, and Infrastructure
In just three years, Mach has grown from a 12-person startup to a 350-person company with a 115,000-square-foot manufacturing facility and design and production operations across multiple locations. By end of 2026, the company expects to have added four new production facilities a pace of infrastructure expansion that is rare for a company at this stage.
On the product side, Mach has five autonomous vehicles in active development:
- Viper – a jet-powered vertical takeoff vehicle
- Glide – a high-altitude glider capable of launching weapons
- Stratos – an airborne surveillance platform
- Dart – a low-cost counter-drone interceptor
- Pike – intended for launching long-range munitions
Production is expected to begin on at least three of these systems before year-end, giving the company near-term revenue visibility across both government and commercial channels.
DoD Contract and a Sixth Vehicle
This week, Mach announced it had won a contract from the Defense Innovation Unit (DIU) to develop a new “runway-independent strike aircraft” for the U.S. Navy a sixth vehicle the company had not previously disclosed publicly. Thornton described it as a large aircraft with potential commercial applications beyond the defense sector.
The award underscores Mach’s growing credibility with the Department of Defense and its ability to win contracts in a competitive defense procurement environment dominated historically by legacy prime contractors.
Vertical Integration Through the Exquadrum Acquisition
A major driver of investor enthusiasm was Mach’s acquisition last month of solid rocket motor (SRM) startup Exquadrum in a $50 million cash-and-equity deal beating out more than eight competing buyers. The move was strategically significant: SRMs are in acute shortage as drone demand has surged, with lead times for purchasing from the two dominant suppliers Aerojet Rocketdyne and Northrop Grumman stretching years.
By acquiring Exquadrum, Mach now controls its own rocket motor supply chain and has launched a new commercial business, Mach Energetics, to sell engines to other companies. The current revenue mix is approximately 50/50 between government and commercial customers.
Defense Tech: The Other Hot Sector Alongside AI
Investor interest in defense technology has accelerated significantly as autonomous weapons and drone defense systems have demonstrated real-world effectiveness on the battlefield in Ukraine. For venture-backed firms, the thesis is straightforward: bring faster and more affordable products to the military than the expensive, long-cycle offerings of legacy prime contractors.
Mach is a compelling case study in that thesis. Thornton noted that building a jet engine traditionally takes approximately four years with established teams. Mach went from founding a team to a jet engine firing in roughly eight months.
“That is, after all, the entire reason for his company and for the defense tech industry,” Thornton said of the speed advantage.
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