Hon Precision, MPI, WinWay: AI-Driven Structural Increase in Testing Intensity Warrants Value Rerating

Core Conclusion

Semiconductor testing is undergoing a paradigm shift from a cost center to a critical value driver, propelled by AI/HPC demand, rising chip complexity, and larger packages. We initiate coverage on Hon Precision, MPI, and WinWay with Overweight ratings, as they are positioned to capture outsized growth from this multi-year structural upcycle. Their proximity to the TSMC ecosystem provides a sustainable competitive edge.

What the Market Underappreciates

The market likely underappreciates the magnitude and durability of the testing value-add uplift. Testing is no longer just about defect screening; it is integral to performance validation and reliability assurance for complex AI chips. This drives longer test times, more test insertions, and higher-value equipment. The regional advantage of Taiwan-based suppliers for faster iteration and client integration is also a key, underappreciated moat.

Evidence Chain

AI/HPC Demand is Driving a Structural Increase in Test Intensity & Duration. Test times are lengthening significantly as chips become more complex and powerful. NVIDIA's final test time more than doubled from Hopper to Blackwell and is expected to increase another 30-50% for Rubin. HBM DRAM testing is 5-10x longer than for smartphone DRAM. This directly expands the available revenue pool per chip for test equipment suppliers like handlers (Hon Precision) and sockets (WinWay).

Advanced Packaging Technologies Introduce New Layers of Testing Complexity and Steps. Chiplet architectures require testing at multiple stages (wafer-level, partial-assembly), increasing total test cost. Co-Packaged Optics (CPO) introduces 3-4 test insertion stages, with volume ramps expected from 2027e. Micro-Channel Lid (MCL) adds requirements for leakage and integrity testing. These trends create incremental, high-value opportunities for probe cards (MPI in Insertions 2/3), handlers (Hon Precision in Insertion 4/FT), and specialized sockets (WinWay).

Company-Specific Leadership and Growth Trajectories are Compelling. Hon Precision commands >70% share in AI/HPC final test handlers, leveraging its patented Active Thermal Control technology. We forecast a 61% revenue CAGR (2025-28e). MPI, a top-5 global probe card supplier, is gaining share in high-growth VPC and MEMS segments, driven by AI chip pin-count and performance demands, with a 66% revenue CAGR (2025-28e). WinWay, the global #2 test/burn-in socket supplier, benefits from Hypersocket adoption for high-pin-count AI packages and a strategic probe card alliance, targeting a 71% revenue CAGR (2025-28e).

Key Divergences & Risks

The primary risk is a material slowdown in AI semiconductor demand, which would immediately impact upstream test equipment orders. Supply and infrastructure constraints (fab capacity, power) could delay deployments. Competition may intensify as the market expands. Adoption of new technologies like CPO and MCL could be slower than expected. Execution risks exist around customer qualification cycles and capacity ramp-ups. Valuation multiples are high, reflecting high growth expectations.

Valuation and Trading Implications

Our Base Case target prices are NT$5,000 for Hon Precision (26x 2027e P/E), NT$5,800 for MPI (44x 2027e P/E), and NT$12,000 for WinWay (61x 2027e P/E). These premiums are justified by superior earnings growth (2025-28e EPS CAGRs of 87%, 94%, and 95%, respectively) versus global peers. The stocks offer leveraged exposure to the structural re-rating of the semiconductor testing value chain. Near-term catalysts include order announcements related to next-gen AI platforms (Rubin, MI500) and CPO/MCL qualifications.

Appendix: Key Data Summary

Exhibit 10 (Abridged): Coverage Overview & Preference

Exhibit 11 (Abridged): Valuation & ROE Comparison