Layer 6 · 8150 — ChipMOS Technologies
Live: TWD 73.7 · Earnings (last): Q1 2026 — EPS TWD 0.71 vs TWD 0.52 (+36.5% beat); rev $216.4M +25.4% YoY · Next earnings: not within 60d · Conviction: 4/10
Bottleneck context
ChipMOS is a niche OSAT focused on DDIC (display driver IC) and memory test. DDIC supports the AI-adjacent display ecosystem (server-room monitors, automotive ADAS displays, OLED for premium tier devices) but is not itself AI-bottlenecked. Memory test is where the AI read-through exists — HBM stack growth requires more known-good-die verification, and ChipMOS sits on that flow. Q1 beat by 36.5% reflected DDIC and memory test recovery, both real.
Why Tier C
Stock is up 183% over the past year, so the cycle recovery is already substantially priced. Two structural risks: (a) DDIC is cyclical with smartphone and TV demand, both of which are weak; (b) memory test pricing pressure from HBM siphoning OSAT capacity to higher-margin lines can actually hurt the conventional memory test book. ChipMOS captures the AI theme indirectly, at a smaller scale than AMKR or ASE, with more cyclical baggage.
Watch trigger
Two consecutive quarters of EPS beat with explicit HBM test win disclosure.
Position guidance
No position. AMKR or direct Advantest exposure dominates this expression.