ASE Technology Holding Co., Ltd.
ASE Technology Holding Co., Ltd. provides semiconductor assembly and test services, including wafer probing, final testing, packaging, and related materials support. Through its subsidiaries, the group also offers electronic manufacturing services, with operations and customers spanning Asia, the Americas, Europe, and other international markets.
Fiscal year 2025 · change from previous year
Development 2022–2025
Business
Share of revenueTurnkey back-end semiconductor assembly and packaging services for chips.
Wafer probing, final test, and related semiconductor test services.
Bumping, flip chip, wafer-level packaging, and system-in-package solutions.
EMS production and support for electronics customers through USI.
Supporting materials, process inputs, and ancillary manufacturing services.
Customers
ASE Technology serves semiconductor designers and integrated device companies that outsource assembly, test, and advanced packaging. Its EMS business also sells to electronics customers needing manufacturing, integration, and related production support. The company’s customer base is concentrated, with top customers contributing a large share of revenue, which reflects the importance of high-volume, long-term manufacturing relationships.
Buy assembly, test, and packaging capacity for outsourced chip production.
Use the group for back-end manufacturing, testing, and packaging support.
Need bumping, flip chip, WLP, and SiP solutions for complex devices.
Source EMS and product manufacturing services through USI.
Buy packaged, tested, and assembled components for reliability-focused applications.
Strategy
ASE Technology focuses on maintaining breadth across assembly, testing, advanced packaging, and EMS so it can serve customers across multiple chip and electronics categories. The company emphasizes technology development, capacity, and global reach because customers source back-end semiconductor services where scale, process capability, and supply continuity matter. Its strategy also relies on serving a diversified set of end markets, from communications and computing to automotive and industrial applications.
Advanced nodes and heterogeneous integration require more sophisticated back-end services.
Customers need dependable outsourced capacity for high-volume chip output.
Serving communications, computing, automotive, and industrial demand diversifies revenue.
Proximity to customer supply chains improves service and logistics resilience.
Geography
ASE Technology operates a broad manufacturing and customer footprint across Taiwan and multiple overseas markets, including China, South Korea, Japan, Southeast Asia, Mexico, Tunisia, the United States, and Europe. The business is globally distributed because semiconductor assembly, test, and EMS customers often require production close to supply chains, end markets, or electronics manufacturing hubs. Its geographic spread also exposes the company to cross-border logistics, trade policy, and foreign-exchange effects.
Risks
ASE Technology is exposed to cyclical semiconductor demand, high customer concentration, and intense competition in outsourced assembly and test. Its multinational footprint also creates exposure to trade restrictions, geopolitical tension across the Taiwan Strait, and foreign-exchange volatility, while advanced packaging investment raises execution and technology-obsolescence risk.
- Customer concentrationImpact: HighLikelihood: High
Top customers contributed a large share of net revenues, so loss or slowdown of key accounts would impact volumes.
Exposure: Top 10 customers contributed 71% of 1Q26 net revenues and 69% of 2Q26 net revenues
- Semiconductor demand cyclicalityImpact: HighLikelihood: High
Assembly, test, and EMS volumes depend on end-market chip demand and inventory cycles.
Exposure: Communication and computing end markets
- Geopolitical and trade exposureImpact: HighLikelihood: Medium
The company operates across Taiwan, China, the U.S., and other jurisdictions that can be affected by policy shifts.
Exposure - Technology and execution riskImpact: MediumLikelihood: High
Advanced packaging requires continuous process upgrades and successful scaling of new capabilities.
Exposure - Foreign exchange volatilityImpact: MediumLikelihood: High
A globally dispersed business with NT$ reporting is exposed to currency translation and transaction impacts.
Exposure
Accounting
Judgemental itemsThe group reports in NT$ and translates financial statements into US$ for convenience, creating exchange-rate-driven volatility in comparability.
Impact: Reported figures can move with currency rates rather than underlying business performance.
Goodwill is tested annually or when impairment indicators arise, and losses are recognized in profit or loss.
Impact: Can materially reduce earnings if acquired units underperform.
Finite-life intangibles are amortized based on estimated useful lives and reviewed periodically.
Impact: Useful-life changes affect expense recognition over time.
Application mix across communications, computing, consumer, automotive, and industrial end markets can change quarterly.
Impact: Quarterly revenue and margin comparability can be affected by demand shifts.
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Last updated: 28/09/2026