Zhen Ding: Substrate and Optical PCB Scale-Up to Redefine Investor Sentiment

Core Thesis

Zhen Ding is transitioning its revenue base from mature consumer PCBs toward high-growth IC substrates and optical module PCBs. The substrate segment is set to nearly double revenue in 2026 and double again in 2027, while optical PCB sales are guided to double over the 2026–28 period. Because pricing power is expected to emerge from supply-demand dynamics rather than mere cost pass-through starting in 2026, the company’s margin profile is poised for structural improvement. The investment case rests on a re-rating as non-consumer revenue share climbs, moving the stock away from a consumer-electronics EMS multiple toward that of a high-growth AI hardware supplier.

What the Market Underestimates & Evidence

Substrate revenue acceleration and ABF mix improvement Substrate revenue reached NT$11.7bn in 2025 and is targeted at roughly NT$20bn in 2026, with management guiding a further doubling in 2027. ABF’s share of substrate revenue is set to rise from 40% in 2025 to approximately 50% in 2026 and over 60% in 2027, underpinned by Shenzhen ABF capacity that will generate US$1bn annually when fully loaded and Kaohsiung adding another US$200mn. This trajectory indicates substrate growth is not a multi-year linear ramp but a steep inflection. Investment implication: The substrate business alone will become a meaningful contributor to overall profits, justifying a higher growth premium in the valuation multiple.

Optical module PCB leadership Optical module PCB revenues are targeted to double in the 2026–28 window, with Zhen Ding aiming to be the largest supplier globally by 2027. The company has already mass-produced 1.6T optical module mSAP PCBs and is using mSAP for 800G products, despite it not being strictly required. Investment implication: Securing a leading position in the optical interconnect supply chain embeds Zhen Ding into next-generation AI infrastructure spending, providing multi-year revenue visibility uncorrelated to consumer cycles.

2026 revenue guidance driven by non-consumer segments Total 2026 revenue is expected to increase by NT$40–50bn over 2025. With consumer PCB (FPCB and RPCB) growing only at a mid-single-digit pace, the bulk of the incremental revenue originates from substrates, servers, and optical modules. This mix change will naturally elevate gross margins. Investment implication: As non-consumer contributions grow from under 20% to above 35% by 2028, blended profitability and return on invested capital will inflect, creating a catalyst for multiple expansion.

Key Risks

Consumer-electronics business growing at mid-single digits acts as a drag on group-level growth and may dilute the impact of fast-growing segments in the near term.
New plant ramp-up and customer qualification cycles (building ~1 year, equipment installation 1–1.5 years) could delay capacity coming online, leaving revenue targets at risk.
Intensifying substrate industry competition could erode the supply-demand pricing power that Zhen Ding expects to leverage from 2026.
Technology evolution in optical PCBs may shift demand toward more advanced processes, requiring further R&D and capex that could pressure margins if not executed on time.

Valuation & Trade Implication

The combination of a near-doubling of substrate revenue in 2026, optical PCB leadership, and a pricing environment transitioning to supply-driven dynamics creates a visible pathway to earnings upgrades. As the market begins to value Zhen Ding on the growth trajectory of its AI-related businesses rather than its legacy consumer PCB base, the stock’s current valuation—still reflecting a consumer supply chain multiple—has room to expand toward peers more levered to AI infrastructure.