We are building a new way to manufacture complex metal parts. The technologies defining this century, including data centers, rockets, satellites, robots, and advanced energy systems, depend on increasingly complex metal components. Engineers can change a design in hours, but turning that design into a usable part can still take weeks or months. Ultrasonium is building a more direct path from digital design to physical part. Solid metal feedstock goes in, and a finished part safely comes out, controlled by a Physical AI layer and novel control processes. The system melts and deposits metal while using sound waves to shape and control it in the liquid state. We are targeting production up to 15× faster, at 75% lower cost, and with far greater alloy versatility than the legacy manufacturing methods it aims to replace. Ultrasonium is starting with difficult, high-value parts for critical industries, including advanced data center cooling. Longer term, the goal is to make manufacturing faster, more adaptable, and less dependent on fixed infrastructure, so critical parts can be produced much closer to where they are needed: inside factories and maintenance depots, aboard ships, across distributed manufacturing networks in the U.S., and eventually beyond Earth. Our founding team brings experience from MIT, UC Berkeley, Argonne National Laboratory, Lawrence Berkeley National Laboratory, NASA, and federally funded defense and advanced technology programs, spanning physics, metallurgy, manufacturing, controls, and hardware commercialization. @jackqiu168, @hb_ultrasonium, @Chris_Cart3r, & @urban_alex42 We'd like to extend a huge thank you to our early supporters @ycombinator, @GlasswingVC, Blindspot Ventures, @enginexyz, & @NSF!