ASE Technology Holding Co., Ltd. Reports Monthly Net Revenue

## ASE Technology Holding Posts Strong 2025 Finish, Driven by Semiconductor Demand

**TAIPEI – January 9, 2026** – ASE Technology Holding Co., Ltd. (NYSE: ASX, TAIEX: 3711), a global leader in semiconductor packaging and testing services, today announced its unaudited consolidated net revenues for December, the fourth quarter, and the full year of 2025. The company concluded the year with robust performance, signaling sustained strength in the advanced packaging and testing sector, a critical component of the global technology supply chain.

For December 2025, ASEH reported consolidated net revenues of NT$58,865 million (approximately US$1,880 million). This represents a modest 0.1% increase from November 2025 and a significant 11.3% year-over-year growth compared to December 2024. While the sequential month-over-month figure showed a slight dip of 1.2% in U.S. dollar terms, the robust year-over-year increase underscores the company’s expanding market presence and the growing demand for its sophisticated services.

The fourth quarter of 2025 proved to be a strong period for ASEH, with consolidated net revenues reaching NT$177,915 million (approximately US$5,763 million). This marks a healthy 5.5% sequential increase from the third quarter and a substantial 9.6% year-over-year growth from the fourth quarter of 2024. The quarterly performance reflects the accelerating demand in key semiconductor markets, including high-performance computing, artificial intelligence, and advanced mobile devices.

Looking at the full year, ASEH’s consolidated net revenues climbed to NT$645,388 million (approximately US$20,782 million), an 8.4% increase over the NT$595,410 million reported for 2024. In U.S. dollar terms, this translates to an even more impressive 11.8% year-over-year growth. This sustained top-line expansion highlights ASEH’s strategic positioning within the semiconductor ecosystem and its ability to capitalize on the ongoing industry trends.

The Advanced Technology Materials (ATM) segment, a crucial driver of ASEH’s growth, also delivered strong results. In December 2025, ATM net revenues stood at NT$37,586 million (approximately US$1,201 million), reflecting a 4.2% sequential increase and a significant 25.9% jump year-over-year. For the full year 2025, the ATM segment generated NT$389,228 million (approximately US$12,539 million) in net revenues, a robust 19.4% increase from the prior year. This performance in the ATM segment is particularly noteworthy, suggesting strong demand for advanced packaging materials and solutions that are essential for next-generation chip manufacturing.

The impressive financial results for 2025 can be attributed to several factors impacting the semiconductor industry. The escalating demand for AI-powered applications, the continued proliferation of 5G technology, and the increasing complexity of integrated circuits all necessitate advanced packaging and testing solutions. ASEH, with its comprehensive portfolio of services, including flip-chip, wafer-level packaging, and advanced testing capabilities, is well-positioned to meet these evolving industry needs. The company’s ongoing investments in research and development, coupled with its expansive manufacturing footprint, are crucial for maintaining its competitive edge and driving future growth in this dynamic and capital-intensive industry.

**Forward-Looking Statements:**

This press release contains “forward-looking statements” within the meaning of Section 27A of the United States Securities Act of 1933, as amended, and Section 21E of the United States Securities Exchange Act of 1934, as amended. These statements are made under the “safe harbor” provisions of the U.S. Private Securities Litigation Reform Act of 1995. Although these forward-looking statements, which may include statements regarding our future results of operations, financial condition or business prospects, are based on our own information and information from other sources we believe to be reliable, you should not place undue reliance on these forward-looking statements, which apply only as of the date of this press release. The words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “plan” and similar expressions, as they relate to us, are intended to identify these forward-looking statements in this press release. These forward-looking statements are necessarily estimates reflecting the best judgment of our senior management and our actual results of operations, financial condition or business prospects may differ materially from those expressed or implied by the forward-looking statements for reasons including, among others, risks associated with cyclicality and market conditions in the semiconductor or electronic industry; changes in our regulatory environment, including our ability to comply with new or stricter environmental regulations and to resolve environmental liabilities; demand for the outsourced semiconductor packaging, testing and electronic manufacturing services we offer and for such outsourced services generally; the highly competitive semiconductor or manufacturing industry we are involved in; our ability to introduce new technologies in order to remain competitive; international business activities; our business strategy; our future expansion plans and capital expenditures; the strained relationship between the Republic of China and the People’s Republic of China; general economic and political conditions; the recent shift in United States trade policies; possible disruptions in commercial activities caused by natural or human-induced disasters; fluctuations in foreign currency exchange rates; and other factors. For a discussion of these risks and other factors, please see the documents we file from time to time with the Securities and Exchange Commission, including the 2024 Annual Report on Form 20-F filed on March 27, 2025.