ASE Technology Holding Co., Ltd. - 6-K Filing Summary
Business Context and Reporting Period
This Form 6-K, filed on February 5, 2026, reports the unaudited consolidated financial results for ASE Technology Holding Co., Ltd. (ASEH) for the fourth quarter and full year ended December 31, 2025. ASEH is the leading provider of semiconductor assembly and testing services (ATM) and electronic manufacturing services (EMS).
Key Financial Metrics
| Metric | 4Q25 | 4Q24 | Full Year 2025 | Full Year 2024 |
|---|---|---|---|---|
| Net Revenues | NT$ 177,915 million | NT$ 162,264 million | NT$ 645,388 million | NT$ 595,410 million |
| Net Income (Parent) | NT$ 14,713 million | NT$ 9,312 million | NT$ 40,658 million | NT$ 32,483 million |
| Basic EPS (NT$) | 3.37 | 2.15 | 9.37 | 7.52 |
| Diluted EPS (NT$) | 3.24 | 2.07 | 8.89 | 7.23 |
| Gross Margin | 19.5% | 16.4% | 17.7% | 16.3% |
| Operating Margin | 9.9% | 6.9% | 7.9% | 6.6% |
| EBITDA | NT$ 38,344 million | NT$ 28,797 million | N/A | N/A |
| Cash & Equivalents | NT$ 92,469 million | N/A | NT$ 92,469 million | NT$ 76,493 million |
| Current Ratio | 1.28 | N/A | 1.28 | N/A |
| Net Debt to Equity | 0.46 | N/A | 0.46 | N/A |
Capital Expenditures: Total equipment CapEx for 4Q25 was US$733 million. Full-year 2025 CapEx totaled US$3,396 million.
Material Changes vs. Prior Period
- Revenue Growth: 4Q25 revenues increased 9.6% year-over-year (YoY) and 5.5% sequentially. Full-year 2025 revenues grew 8.4% YoY.
- Profitability Expansion: Net income attributable to shareholders rose 58% YoY in 4Q25 and 25% for the full year 2025. Gross margin improved 2.4 percentage points sequentially in 4Q25.
- Segment Performance:
- ATM: Revenues grew 24.2% YoY in 4Q25, driven by strong demand in communication and computing applications. Gross margin expanded to 26.3%.
- EMS: Revenues declined 7.9% YoY in 4Q25. Gross margin slightly decreased to 9.0%.
- Cost Structure: Raw material costs represented 48% of total revenues in 4Q25. Labor costs were 11% of total revenues.
- Non-Operating Items: The company recorded a net gain on foreign exchange hedging of NT$1,384 million in 4Q25, contrasting with losses in prior periods.
Guidance, Outlook, and Risks
Management Commentary: Management highlighted the leading position in semiconductor assembly and testing, with a global presence across Taiwan, China, Southeast Asia, and the US/Europe. The company noted a shift in revenue mix with Communication and Computing applications driving ATM growth.
Risks and Contingencies: The filing includes a Safe Harbor notice identifying significant risks, including:
- Cyclicality and market conditions in the semiconductor industry.
- Regulatory changes and environmental liabilities.
- Geopolitical tensions, specifically the strained relationship between the Republic of China and the People's Republic of China.
- Shifts in United States trade policies.
- Fluctuations in foreign currency exchange rates.
Unusual Items: The filing notes that full-year 2025 results are preliminary and subject to audit adjustments. Significant foreign exchange gains in 4Q25 contributed to non-operating income.
Investor Verification Checklist
- Customer Concentration: Verify the stability of the top 5 customers, who accounted for 41% of total revenues in 4Q25 (ATM basis) and 70% of EMS revenues.
- ATM vs. EMS Mix: Monitor the divergence in performance between the high-margin ATM segment (growing) and the lower-margin EMS segment (declining).
- Capital Allocation: Review the sustainability of US$3.4 billion in annual CapEx relative to free cash flow generation.
- Geopolitical Exposure: Assess the impact of US-China trade policies on operations in China, where a significant portion of manufacturing capacity is located.
- Audit Adjustments: Confirm final audited figures for 2025, as current results are unaudited and preliminary.