Layer 6 · 6488 — GlobalWafers
Live: TWD 822.0 · Earnings (last): Q1 2026 — EPS TWD 3.97 beat 2.2%; rev declined and GM compressed on ramp costs · Next earnings: not within 60d · Conviction: 4/10
Bottleneck context
GlobalWafers is the #3 silicon wafer player globally (after Shin-Etsu and SUMCO). The bottleneck adjacency is identical to SUMCO's — every chip starts on a wafer — and GlobalWafers is building greenfield 300mm capacity in Texas and Missouri to capture AI demand inside the CHIPS Act umbrella. Q1 showed the trade-off: EPS beat but gross margin compressed and revenue declined, because greenfield ramp costs hit before the AI volume arrives.
Why Tier C
Stock is up 142% over the past year on a wafer-cycle recovery narrative, even as Q1 GM took a step down. The bull-vs-bear hinge is whether the AI wafer pull-through materialises before the new capacity creates oversupply. That timing question makes this a B/C swing depending on data — and at +142% trailing return with margin compression visible, the asymmetry tilts negative. The same thesis is cleaner via Shin-Etsu Chemical (Tier B in our universe) which has higher-margin franchises (photoresist, encapsulation) on top of wafers.
Watch trigger
GM stabilises sequentially AND management discloses AI mix > 30% of advanced wafer revenue.
Position guidance
No position. Re-look only if stock corrects 20%+ from current levels.