Atomic Machines has emerged from six years in stealth and disclosed that it has raised $250 million to date from investors including OneIM, Gigafund, XTX Ventures, KAS Venture Partners, Valor Equity Partners, Tru Arrow Partners, Construct Capital, Sozo Ventures and the Regents of the University of California. The company did not identify the funding as a new $250 million financing round.
Founded by Jeff Holden, Atomic Machines is developing the Matter Compiler, an AI-native, all-digital manufacturing system designed to produce working micro-machines directly from digital code. The company says the system can manufacture three-dimensional devices with moving parts, multiple materials and assembled subsystems without requiring conventional hard tooling for each design.
Atomic Machines also introduced PrimeSwitch, the first product family produced using the Matter Compiler. Its PrimeSwitch PS-150 is an electromechanical power relay designed for high-voltage applications, including emerging 800-volt DC power systems in AI data centers. The company says the device opens in 50 microseconds and is currently shipping to early-access customers for evaluation.
The company is based in the San Francisco Bay Area, with operations in Emeryville and Santa Clara, California. Atomic Machines plans to publicly show PrimeSwitch at the Open Compute Project Global Summit in San Jose from October 12 to 15, 2026.
