Celero Communications raised a $275M Series C follow-on round announced September 8, 2026, at a $3 billion valuation, led by Alphabet's CapitalG, Atreides Management and Valor Equity Partners with participation from returning backers Sutter Hill Ventures and Maverick Silicon. The Irvine, California-based startup develops coherent digital signal processors (DSPs) for managing fiber-optic transceivers between data centers, with a chip optimized for AI workloads that the company says delivers lower latency and lower power consumption. The announcement did not disclose specific metrics such as client count, revenue, pipeline or employee count, nor detailed planned use of funds or expansion plans.