Win Semiconductors' optical foundry narrative strengthens, but Nomura still maintains Neutral

Overview

This report is Nomura's company research quick note on Win Semiconductors, focusing on 2Q26 results, 3Q26E guidance, and marginal changes in optical foundry services, satellite communications, and infrastructure businesses. The report title emphasizes 'more positive narratives about optical,' but the investment rating remains Neutral with a target price of TWD590. Win Semiconductors' 2Q26 gross margin was in line with guidance, and strong operating expense control drove operating margin and earnings above expectations. Management also adopted a firmer tone on optical foundry progress, believing 3Q26E growth will be driven by optical.

Core views

Nomura's core views are: first, Win Semiconductors' 2Q26 execution was better than market concerns, with consolidated gross margin at 28.2%, utilization rising from 60% in 1Q26 to 65%, operating expense ratio falling to 14%, and operating margin rising to 14.1%. Second, 3Q26E revenue is expected to grow by low double digits QoQ, with optical as the main growth driver and infrastructure second, while mobile phones and Wi-Fi are roughly flat to slightly up. Third, optical foundry services have entered a clearer mass production phase, with PD ramping for a major customer at the end of 2Q26 and customer demand forecasts positive; VCSEL, EML, and subsequent CW laser form the mid-term product pipeline. Fourth, within infrastructure, satellite communications and base stations now contribute roughly equally, while LEO, direct-to-cell, and GaN high-power demand may improve product mix. Fifth, despite substantial upside versus the current price, Nomura maintains Neutral, reflecting a balanced view on valuation, customer concentration, the sustainability of project-based revenue, and uncertainty in end demand.

Analysis framework

The report combines earnings tracking, management call notes, segment revenue mix, capacity and depreciation analysis, product mix changes, and relative valuation. The focus is not on rebuilding a full earnings model, but on assessing how gross margin drivers, optical foundry ramp-up, infrastructure demand, and inventory changes affect Win Semiconductors' mid-term narrative based on 2Q26 results and 3Q26E guidance. On valuation, the disclosed target price of TWD590 is based on 50x 2027F EPS, with the target multiple at the high end of the historical range, while the stock is currently trading at about 29x 2027F EPS or 3.1x 2027F BVPS.

Methodology notes

• Company fundamentalsEarnings and guidance comparison

  Compare actual 2Q26 revenue, gross margin, and operating margin with management guidance, Nomura forecasts, and market consensus.

  This method is used to assess short-term operating quality. The report shows that 2Q26 gross margin was in line with high-20%s guidance, while operating expense control drove earnings above expectations. For 3Q26E, the focus is on whether low-double-digit revenue growth and low-30%s gross margin can be delivered.

• Business structure analysisRevenue mix and gross margin drivers

  Break down revenue contribution by Cellular, Infrastructure, Wi-Fi, Optical, and Others, and assess gross margin differences across businesses.

  The report believes infrastructure gross margin is significantly above the company average, optical is roughly in line with the company average, while mobile phones and Wi-Fi are below average. Therefore, a higher infrastructure revenue mix, lower depreciation, and improved utilization are important drivers of recent gross margin improvement.

• Industry chain trackingOptical communications and satellite communications product line tracking

  Track the mass production timeline, customer demand, and application scenarios of products such as PD, VCSEL, EML, CW laser, and GaAs/GaN PA and LNA.

  The report views optical and satellite communications as key to improving the mid-term narrative. PD mass production and EML/VCSEL ramp-up support optical communications revenue reaching a high-single-digit mix in 2026E, with potential to move toward a double-digit mix in 2027E.

• Valuation methodsTarget P/E method

  The target price of TWD590 is based on 50x 2027F EPS.

  Nomura uses 2027F EPS multiplied by a target multiple for valuation, with the target multiple at the high end of the historical range. It also discloses that the current share price corresponds to about 29x 2027F EPS and 3.1x 2027F BVPS.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Win Semiconductors (3105.TWO)

  Report subject and covered stock

  Strengths

  More positive progress in optical foundry services, with PD entering mass production and VCSEL and EML already having a production base; infrastructure revenue is close in scale to mobile phone revenue and carries higher gross margin; strong expense control in 2Q26 and improved utilization.

  Weaknesses

  3Q26E revenue guidance is still described as on the low side; optical PD currently relies mainly on a single strategic customer; infrastructure and satellite revenue are project-based in nature, and sustainability needs to be tracked.

  Comparison

  Infrastructure gross margin is above the company average, optical is roughly in line with the company average, while mobile phones and Wi-Fi are below the company average; satellite and base station contributions within infrastructure are now roughly equal.

  Risks

  Weak mobile phone sell-through, rising competitor share, slower customer ramp, changes in Qualcomm PA share, raw material supply risks, and uncertainty in new equipment qualification timing.

• Optical communications business

  Core driver of Win Semiconductors' mid-term growth narrative

  Strengths

  PD entered mass production at the end of 2Q26 and will ramp in 3Q26E; VCSEL and long-reach EML are already in production, mid-reach EML is expected to join in 2H26, and CW laser is expected to begin initial contribution in 2H27.

  Weaknesses

  PD is currently concentrated in a single customer, and more meaningful contribution from CW laser may not come until 2027-28E.

  Comparison

  Optical was the application with the most notable QoQ growth in 2Q26, with its 2026E revenue mix expected to be in the high single digits and likely to move into double digits in 2027E.

  Risks

  Risk that customer demand forecasts are not realized, product qualification risks, and share uncertainty arising from customers' own epitaxy or third-party epitaxy choices.

• Satellite communications and infrastructure business

  Source of product mix improvement and higher gross margin

  Strengths

  GaAs and GaN are used in PA and LNA for constellations and ground gateways, while direct-to-cell and demand for higher frequency bands/higher power are favorable for GaN devices.

  Weaknesses

  Infrastructure revenue is project-based and non-recurring; 5G deployment is in a late cycle, and the sustainability of base station growth is limited.

  Comparison

  Satellite and base station contributions within infrastructure are currently roughly equal; last year base stations exceeded satellites, while this year new satellite deployment and direct-to-cell are increasing satellite scale.

  Risks

  LEO deployment pace, customer project progress, uncertainty in 6G discussions, and geopolitical supply chain disruptions.

Key data

• 2Q26 revenueTWD5.257bnUp 15% QoQ and 39% YoY, in line with mid-teens QoQ growth guidance.
• 2Q26 consolidated gross margin28.2%In line with high-20%s guidance; Win Foundry standalone gross margin was 32.6%, up 0.5ppt QoQ.
• 2Q26 utilization65%Higher than 60% in 1Q26.
• 2Q26 operating margin14.1%Higher than 9.4% in 1Q26; operating expense ratio fell from 17% to 14%.
• 3Q26E revenue guidancelow double-digit QoQ growthManagement expects optical to lead growth, followed by infrastructure, while mobile phones and Wi-Fi are flat to slightly up.
• 3Q26E gross margin guidancelow-30%sThis is consolidated gross margin guidance.
• 2Q26 revenue mixCellular 30-35%; Infrastructure 30-35%; Wi-Fi 10-15%; Optical 10-15%; Others 5%Infrastructure revenue mix is now close to that of mobile phones.
• InventoryTWD7.6bnUp 48% QoQ, mainly due to raw material and chemical stocking to address supply chain security and capacity ramp-up.
• 2026 capex guidanceTWD2-3bnManagement maintained full-year capex budget, with expansion focused on GaN and InP.
• Target price and ratingTWD590.00; NeutralBoth target price and rating are unchanged; closing price was TWD341.50 on 2026-07-24.

Impact & implications

The implication of the report for Win Semiconductors is that market focus may gradually shift from the traditional mobile PA cycle toward optical communications, AI data centers, satellite communications, and higher-margin infrastructure businesses. If PD, VCSEL, EML, and subsequent CW laser continue ramping, and satellite communications projects continue, Win Semiconductors' revenue mix and gross margin elasticity could improve. However, the current narrative still comes with risks such as customer concentration, discontinuity in project-based revenue, uncertainty in equipment delivery and depreciation timing, and volatility in mobile end demand, so Nomura did not upgrade the rating.

Risks

• Lower-than-expected smartphone sell-through in China may affect mobile PA demand.
• Market share gains by competitors such as AWSC and Coherent may pressure Win Semiconductors' share and profitability.
• Market share gains among Chinese customers may be slower than expected.
• Faster-than-expected loss of Qualcomm PA market share may affect related supply chain demand.
• The PD business currently relies mainly on a single strategic customer, resulting in high customer concentration.
• Infrastructure revenue such as satellite and base station business is project-based, with weaker revenue continuity and predictability.
• Raw material and chemical supply chains are affected by export controls, conflict in the Middle East, and geopolitics.
• Uncertainty in new equipment delivery, installation, and qualification timing may affect capacity, depreciation, and mass production progress.

What to watch

• Whether 3Q26E optical revenue becomes the largest source of QoQ growth as management expects.
• Whether demand forecasts from the main PD customer match actual pull-ins.
• The mass production progress of VCSEL and long-reach/mid-reach EML, as well as the contribution path of CW laser after 2H27E.
• Whether optical communications revenue mix moves from high single digits in 2026E to double digits in 2027E.
• Whether satellite revenue within infrastructure exceeds base station revenue, and progress in direct-to-cell projects.
• Whether consolidated gross margin stably enters the low-30%s, and whether the infrastructure and optical product mix can offset gross margin pressure from mobile phones and Wi-Fi.
• Whether higher inventory is smoothly converted into production ramp-up rather than becoming a subsequent inventory risk.
• The pace of full-year TWD2-3bn capex, GaN/InP capacity expansion, and depreciation expense.