The Mach Industries Series C closed on 2 June 2026, raising $300 million and valuing the defence startup at $1.8 billion, roughly four times where it stood when it raised $100 million at a $470 million valuation in June 2025, according to TechCrunch’s Series C report. The round was led by Infinite Capital and Ribbit Capital, with Bedrock Capital, Sequoia Capital, and Khosla Ventures also participating. Total funding now stands at roughly $485 million. For a company that started with a hydrogen-powered prototype built from Home Depot and Amazon parts, that’s a lot of runway to justify.
Six programmes, zero in full-rate production
Founder Ethan Thornton dropped out of MIT at 19 and built Mach around a conviction that unmanned systems would redefine warfare and that the US was moving too slowly to meet the moment. Midway through 2026, Mach is simultaneously running six weapons programmes: a vertical-takeoff strike aircraft, a long-range anti-ship missile, two stratospheric systems, a surface-to-air interceptor designed to kill drones cheaply, and a recently announced 40-foot Navy logistics-and-strike aircraft weighing roughly 4,000 pounds, capable of flying over a thousand miles with a thousand-pound payload.
That last platform is a considerable leap for a company whose largest aircraft to date has been roughly 13 feet long. None of the six is yet in full-rate production. Thornton says Mach has won around 13 government contracts, most sitting past initial design and into government-range testing, but short of the rate-manufacturing tier that fewer than 10 programmes industry-wide have ever reached.
Thornton’s case for spreading effort across six fronts rather than one is that defence doesn’t reward single-minded focus the way, say, rocket launch does. ‘It is a chess game you’re playing with an adversary,’ he said at TechCrunch’s StrictlyVC event in Los Angeles, ‘with hundreds of different products that need to be shipped if we want security.’ Pick just one, and you’ve already lost the game, in his telling.
The supply chain bet behind the Mach Industries Series C
The more interesting story beneath the funding headline is what Mach is doing with its cash. Thornton argues that the real bottleneck in defence tech isn’t platforms; it’s the supply chain underneath them. ‘The hard part is actually getting the stuff into the building,’ he said: jet engines, solid rocket motors, radar.
Mach built and fired two jet engines from scratch in roughly eight months, a process Thornton says traditionally takes four years. In April 2026, it went further and acquired Exquadrum, a 24-year-old solid rocket motor company based in Victorville, California, for $50 million in a cash-and-equity transaction, beating out roughly eight other bidders, according to TechCrunch’s Exquadrum acquisition report. Exquadrum’s 85 employees and California test site are now part of Mach, and the unit has been rebranded as Mach Energetics, with plans to sell components, testing services, and subsystems to other defence firms.
The acquisition addresses a genuine chokepoint. The US industrial base for solid rocket motors has shrunk from six manufacturers to effectively two: Aerojet Rocketdyne (now part of L3Harris) and Northrop Grumman, a concentration the Pentagon has repeatedly flagged as a national security liability, per TechTimes. The deal itself came about almost accidentally: in September 2025, an Exquadrum customer at an MIT recruiting event overheard a Mach recruiter mention the company was looking for a solid rocket motor supplier. Components and subsystems now account for roughly half of Mach’s revenue.
Customers confirmed as of the Series B include the Army, Air Force, and Special Operations Command, according to Contrary Research. Thornton has also said the Viper strike missile is designed to cost under $100,000 to manufacture at scale, a figure that would make it dramatically cheaper than most conventional munitions if Mach can hit it.
The round was handled by law firm Cooley LLP, which also advised Mach on the Exquadrum deal and its prior Series B, a continuity that suggests the company isn’t exactly slowing down its deal cadence.
Comparisons to Anduril are inevitable, and Thornton invites them himself, though he frames the difference as hardware-up versus software-down. The gap in scale is harder to frame away: Anduril raised $5 billion in May at a $61 billion valuation and landed a 10-year, $20 billion-ceiling Army enterprise contract in March consolidating over 120 separate procurement actions. Mach is operating in that shadow, at roughly one-thirtieth the valuation.
Thornton’s stated goal is to push three of the six programmes into rate manufacturing by year end, scaling from hundreds of units a month to hundreds of thousands, at a factory Mach plans to stand up soon. The Series C gives him the capital to try. Whether six simultaneous bets proves visionary or just very busy is the question his next 18 months will have to answer.
