The AI Chip Test Gatekeepers — Every Accelerator Must Pass Through These Machines · The Memory Wall — HBM, DRAM, NAND & the AI Memory Cartel
6857.T
AdvantestForeign listing — not directly tradable in a US brokerage. Editorial detail only.
~70% of HBM/AI tester market. Every NVIDIA Blackwell, AMD MI400, Google TPU, and AWS Trainium tests on its V93000.
What they do
Japanese maker of Automated Test Equipment (ATE) . The flagship V93000 platform tests AI SoCs and HBM stacks at speeds the chip will see in the field. Per Chip Stock Investor and multiple analyst reports, Advantest captures ~50-58% of the total ATE market and ~70% in HBM-specific and high-end AI testers. FY26 guide: ¥1,420B revenue, ¥627B operating income.