Unimicron Earnings Preview: CoWoS Substrate Tightness as the Real AI Supply Chain Bellwether
tengyanAI · x · 2026-07-28
An analyst argues that the market is using the wrong map by viewing Unimicron simply as an ABF substrate recovery story. The upcoming earnings report is fundamentally a read on CoWoS substrate tightness.
- Revenue vs. Gross Margin: Despite HPC revenue surging 58% YoY in Q1, the real metric to watch this quarter is gross margin (GM), not revenue.
- Supply Chain Bottleneck Signals: If GM comes in >18%, it indicates pricing power is holding and CoWoS substrates remain a binding constraint for NVIDIA/AMD packaging into year-end. Conversely, flat GM despite a revenue beat would suggest the substrate bottleneck is easing as supply catches up.
- Industry Context: This outlook aligns with recent reports of a 29% ABF substrate shortage, prompting target price upgrades for major substrate manufacturers.
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