Realtek Semiconductor: Customer restocking drives 1H26, but cost pressure caps 2H upside

Core Conclusion

Realtek's 1Q26 revenue beat by 5% (NT$36.4bn, +39% Q/Q), but gross margin missed the underlying trend at 49.7% due to net inventory write-offs, and EPS was 16% below expectations. The 1H26 strength is driven by customer pre-stocking ahead of price hikes and upstream uncertainties, but component cost increases will weigh on 2H26 momentum. Maintain Equal-weight with a NT$570 target (16x 2026e P/E). The stock at NT$537 (15x 2026e P/E) appears fairly valued given near-term earnings risk from rising costs.

What the Market May Be Underestimating

The market likely overestimates the sustainability of the restocking tailwind and underestimates the margin drag from higher component costs in 2H26. Consensus EPS estimates face downward revision risk once pre-buying subsides and cost pass-through fails to fully protect margins. The 2026e EPS of NT$35.37 already incorporates an 8% upward revision, but the 2027e EPS increase is only 3%, signaling limited visibility beyond the current cycle.

Evidence Chain

1. Top-line beat masks margin and earnings shortfall. Revenue exceeded estimates by 5%, yet gross margin declined 1.9ppt Y/Y to 49.7% due to net inventory write-offs (vs. write-backs in 1Q25). EPS of NT$8.44 was 16% below forecast, illustrating that top-line strength did not flow through to the bottom line.

2. 1H26 restocking is temporary; 2H26 outlook weakens. Management guides inventory restocking to extend into 2Q26, driven by customer fears of price increases and supply constraints. For 2H26, rising component costs are expected to suppress demand below seasonal trends. We raised 2026 EPS by 8% but only 3% for 2027, reflecting the expected deceleration.

3. Long-term growth hinges on product upgrades, not volume. Realtek focuses on WiFi 7 (26.6% of 2026 sales, down from 29.3% in 2025), AI-enabled PC peripherals (AI cameras, 10G Ethernet), and automotive Ethernet benefiting from China’s localization push. Its AI glasses solution reduces BOM cost 70-80% vs. Qualcomm. However, these tailwinds are unlikely to offset near-term cyclical headwinds and cost pressures.

Key Disagreements and Risks

• WiFi 7 adoption below expectations. WiFi sales as a percentage of total are declining in 2026e despite absolute dollar growth; any weakness in adoption would further pressure margins.
• Component cost inflation erodes gross margin. 2026e GM is forecast at 49% vs. 50% in 2025. Further increases in upstream costs (wafer, packaging) could compress margins below 48%, challenging EPS.
• TV SoC share loss in China. Intel and local competitors continue to gain ground; Realtek’s TV SoC exposure (11.9% of 2026e sales) is a risk.
• Demand cliff post-restocking. If end-demand fails to absorb pre-built inventory, 2H26 revenue could miss consensus by double digits.

Valuation or Trading Implication

Our residual income model yields a NT$570 target (16x 2026e P/E), broadly in line with the 1-year forward historical average. Current price at NT$537 (15x) offers limited upside. Bull case (NT$840) assumes 24x on strong WiFi and margin recovery; bear case (NT$350) at 10x assumes severe margin erosion. Risk/reward is skewed to the downside over the next 6-12 months. Maintain Equal-weight; investors should wait for a clearer margin inflection or a sell-off providing a better entry point.

Appendix: Key Financial Data