Third Quarter 2025 Earnings Release ASE Technology Holding 30 October, 2025 Safe Harbor Notice This presentation 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 stat ...

Financial Performance - First Half 2025 - Consolidated revenues grew by 9% year-over-year (YoY) in the first half of 2025 [3] - ATM (Assembly, Testing, and Material) revenues increased by 18% YoY in the first half of 2025 [3] - The testing business experienced substantial growth, increasing by 31% YoY in the first half of 2025 [3] Strategic Focus - Advanced Packaging and Testing - Leading-edge advanced packaging and testing revenues accounted for over 10% of ATM revenues in the first half of 2025, compared to 6% for the full year 2024 [3] - The company targets a US$1 billion increase in leading-edge advanced packaging and testing revenues versus 2024, contributing 10% of growth [4] - The company expects revenue uptrend continuing into 2026 and beyond driven by leading-edge solutions and broad-based semiconductor demand related to AI proliferation and general recovery [4] Capital Expenditure - Machinery capital expenditure (capex) amounted to US$19 billion in the first half of 2025 [3] - Building, facility, and automation capex reached US$09 billion in the first half of 2025, primarily driven by advanced packaging and testing [3] Second Quarter 2025 Results (NT$ million) - ATM net revenues for Q2 2025 were 91,648, representing a 20% YoY increase [10] - EMS net revenues for Q2 2025 were 58,374, showing a 7% YoY decrease [10] - Total net revenues for Q2 2025 reached 150,750, representing a 7% YoY increase [10]

Financial Performance - Consolidated - Total net revenues for Q1 2025 were NT$148,153 million, a 9% decrease QoQ and a 12% increase YoY[3] - ATM (Assembly, Testing, and Material) revenue was NT$85,606 million, representing 57.8% of total net revenues[3] - EMS (Electronic Manufacturing Services) revenue was NT$61,860 million, accounting for 41.7% of total net revenues[3] - Net income attributable to shareholders of the parent was NT$7,554 million[3] Financial Performance - ATM - ATM revenue in Q1 2025 reached NT$85,606 million, a 2% decrease QoQ but a 17% increase YoY[3] - Packaging accounted for 80.0% of ATM net revenues, totaling NT$69,360 million[7] - Testing contributed 18.5% to ATM net revenues, amounting to NT$16,004 million[7] - ATM gross profit was NT$19,611 million, with a gross margin of 22.6%[7] Financial Performance - EMS - EMS net revenues for Q1 2025 were NT$62,295 million, a 17% decrease QoQ and a 5% increase YoY[17] - EMS gross profit was NT$5,528 million, resulting in a gross margin of 8.9%[17] Balance Sheet Items - Cash and cash equivalents stood at NT$77,100 million as of March 31, 2025[19] - Total assets amounted to NT$774,177 million[19] - Total liabilities were NT$439,154 million[19] - Total equity (including non-controlling interest) was NT$335,023 million[19] Q2 2025 Outlook - The company projects ATM revenue growth of 9% to 11% QoQ in NT dollar terms[24] - The company anticipates ATM gross margin to increase by 140-180 basis points QoQ[24] - The company expects EMS revenue to decline by 10% YoY in NT dollar terms[24] - The company forecasts EMS operating margin to decline by 100 basis points YoY[24]