The defense tech sector is rewriting the rules of startup growth, and no company embodies that shift quite like Mach Industries. The Huntington Beach-based startup, founded just three years ago by a then-19-year-old MIT dropout, has closed a $300 million Series C at a $1.8 billion valuation — nearly quadrupling its price tag in just twelve months.
That kind of trajectory is rare in any industry. In defense, it’s practically unheard of. But Mach isn’t playing by old rules, and that’s exactly why investors are lining up.
The Numbers Tell the Story
To put the growth in perspective: in June 2025, Mach raised $100 million at a $470 million valuation. One year later, it’s closing a round four times the size at roughly four times the valuation — and it was oversubscribed at both targets. Founder and CEO Ethan Thornton originally aimed for $200 million before the round’s popularity pushed the figure to $300 million.
The round was led by deep tech fund Infinite Capital and Ribbit Capital, a firm better known for its fintech bets but recently active across the startup landscape — from AI coding platforms to cloud infrastructure plays. Sequoia Capital, Bedrock Capital, and Khosla Ventures also participated, signaling broad institutional confidence in Mach’s trajectory.
More Than Hype: Tangible Production
What separates Mach from the crowded field of defense tech hopefuls is production velocity. The company now has five autonomous vehicle platforms in various stages of development, with production slated to begin next year on at least three of them. Its lineup includes Viper (a jet-powered vertical takeoff vehicle), Glide (a high-altitude glider), Stratos (an airborne surveillance platform), Dart (a low-cost counter-drone interceptor), and Pike (long-range munitions).
A newly awarded Department of Defense contract — through the Defense Innovation Unit — adds a sixth, previously undisclosed vehicle to the pipeline: a “runway-independent strike aircraft” for the Navy. Thornton says the aircraft could have commercial applications as well, hinting at ambitions that extend beyond pure defense work.
The company has grown from roughly a dozen employees in its first year to about 350 today, with a 115,000-square-foot manufacturing facility in Huntington Beach and plans to open four additional production facilities by year-end.
The Acquisition That Changed the Game
Perhaps Mach’s most strategic move came last month, when it acquired solid rocket motor (SRM) startup Exquadrum in a $50 million cash-and-equity deal, beating out more than eight other potential buyers. The SRM market is notoriously constrained — dominated by legacy primes Aerojet Rocketdyne and Northrop Grumman, with lead times stretching years. By bringing SRM production in-house, Mach gains a critical supply-chain advantage and has launched Mach Energetics to sell those engines commercially.
“Traditionally, it’s four years to build a jet engine,” Thornton told TechCrunch. “We went from no team to building a team to a jet engine firing in about eight months.”
That speed is the entire thesis behind the modern defense tech movement. The pitch to VCs — and to the Pentagon — is straightforward: startups can deliver faster, more affordable solutions than the expensive, bespoke offerings that have defined military procurement for decades.
What This Means for Startup Founders
Mach’s trajectory offers several lessons for founders building in capital-intensive industries. First, timing matters enormously. The war in Ukraine has created an immediate, real-world proving ground for autonomous systems, and VC enthusiasm for defense tech has followed. Second, controlling your supply chain is a moat worth acquiring — the Exquadrum deal doesn’t just save money, it removes a multi-year bottleneck that competitors can’t easily replicate.
But perhaps the most striking takeaway is about fundraising psychology. Mach was oversubscribed at $200 million and oversubscribed again at $300 million. That suggests that when you have the right narrative — rapid production, government contracts, strategic acquisitions — investors will compete to be part of the story, even at eye-popping valuations.
This article was adapted from reporting by TechCrunch. Read the original coverage here.
