T. Rowe Price Associates led a $400m Series D round in Lightmatter.

T. Rowe Price Associates, an asset manager, led a $400m Series D round in Lightmatter, a photonic supercomputing company, with participation from Fidelity Management & Research Company and GV Google Ventures. “We’re not just advancing AI infrastructure—we’re reinventing it. With Passage, the world’s fastest photonic engine, we’re setting a new standard for performance and breaking through the barriers that limit AI computing. This funding accelerates our ability to scale, delivering the supercomputers of tomorrow today," Nick Harris, Lightmatter Co-Founder and CEO.