Celero Communications raised $275 million in a funding round that values the AI chip startup at more than $3 billion. The round was co-led by Atreides Management, Valor Equity Partners, and CapitalG, Alphabet’s venture capital arm. Founded in 2024, Celero develops coherent digital signal processors for optical fiber data transmission in AI systems, aiming to improve high-speed data transfer between data centers and server racks within a single data center. Gavin Baker, managing partner and chief investment officer of Atreides, will join Celero’s board of directors.