Primarius Technologies — AI supply-chain exposure

Primarius is a Chinese EDA company specialising in device modeling, SPICE circuit simulation and yield-oriented design-technology co-optimization — the software that lets designers predict how a transistor will behave before any silicon is committed. EDA sits at the very front of the chain, small in spend but a true chokepoint: no chip is designed without it, and the field is dominated by a few Western incumbents. That makes a credible domestic modeling-and-simulation vendor structurally valuable to China's foundries and designers, however narrow its current foothold in the tool stack.