SUMCO Corp (ADR)

Q2 CY2025 (Apr-Jun 2025): SUMCO estimated quarterly revenue ~¥112B (~$730M). AI chip production was now a dominant driver of leading-edge semiconductor manufacturing. TSMC's AI-related wafer starts were estimated at 40%+ of leading-edge capacity. HBM represented roughly 25-30% of total DRAM wafer starts (up from <5% in 2022). NVIDIA next-generation Rubin architecture in design/tape-out. Multiple hyperscaler custom AI chips in production. The cumulative effect of AI-driven wafer demand growth was now material for pure-play wafer suppliers like SUMCO: (1) 300mm leading-edge logic wafers for AI GPUs/TPUs/ASICs, (2) 300mm DRAM wafers for HBM, (3) 300mm wafers for CoWoS interposers, all adding incremental demand that would not exist without AI. Math: 75% from 300mm x 33% leading-edge share x 40% AI share of leading-edge = ~9.9%, rounded to 10.0%. ~¥112B x 10.0% = ~¥11.2B (~$73M) estimated AI revenue.