- Mach Industries raised $600 million more, taking its Series C total to $900 million.
- The round values it at $3.7 billion, more than double the $1.8 billion mark it hit in June.
- Total funding tops $1 billion across five rounds since the company launched in 2023.
Mach Industries has made its own funding round look cheap. Three months after Ethan Thornton, the 22-year-old founder and CEO, closed a $300 million Series C at a $1.8 billion valuation, the defence manufacturer has come back for $600 million more. Investors have priced it at $3.7 billion, more than double where it stood in June.
The extension pushes the Series C’s total size to $900 million and takes Mach’s lifetime funding past $1 billion, just over a year after a Series B valued it at $470 million. Ribbit Capital, Infinite Capital, Bedrock Capital, and Sequoia Capital all doubled down in the second tranche, the same group that led the June round.
“Modern deterrence requires an industrial base capable of building relevant capabilities at the speed and volume the mission demands. This investment allows us to continue expanding that capacity while moving new platforms from development into production faster,” said Thornton.
Ethan Thornton’s vision on a new defence industry
Mach builds vertical takeoff and landing drones, long-range strike systems, and counter-drone platforms out of a 115,000-square-foot headquarters in Huntington Beach, California.
But its real pitch to investors is upstream of any single weapon. In May, it paid roughly $50 million in cash and equity for Exquadrum, a solid rocket motor startup, beating out at least eight other bidders for a company sitting on a supply-chain bottleneck that drone demand has made acute.
That deal became the basis for Mach Energetics, a new unit that sells rocket motors and energetic systems to external customers. A second unit, Mach Propulsion, is chasing the same playbook in jet engines.
A field that’s getting expensive fast
Mach isn’t the only one raising at speed. Anduril more than doubled its valuation to $61 billion in a $5 billion round led by Thrive Capital and Andreessen Horowitz in May, and Shield AI raised a $2 billion package, $1.5 billion in equity plus $500 million in preferred financing from Blackstone, at a $12.7 billion valuation the same spring. The manufacturing-first argument Mach is making has also shown up at Hadrian, which raised $1.37 billion at a $7.87 billion valuation in August to build precision parts for other defence primes.
Mach also picked up a Defense Innovation Unit contract in June, partnering with Whisper Aero to develop a maritime strike aircraft called Atlas, adding to earlier Army-funded work on its Strategic Strike missile.
None of this settles the actual question hanging over the sector: whether any of these companies can manufacture at the volume their valuations now assume, or whether venture money is once again pricing ambition years ahead of a factory’s ability to deliver it.
