[ASUS] Disclosure of financial and business information due to reaching the criteria for published attention transaction information in the centralized trading market

1. Date of occurrence: 2026/06/04 2. Reason for occurrence: Handled in accordance with the instructions of the Taiwan Stock Exchange Co., Ltd. 3. Financial and business information:

| Item | April 2026 (Solo) | YoY (%) | Q1 2026 (Consolidated) | YoY (%) | Trailing Four Quarters | |---|---|---|---|---|---| | Operating Revenue (Million TWD) | 84,881 | 63.32 | 208,370 | 41.08 | 799,581 | | Pre-tax Net Profit (Million TWD) | 5,050 | 222.48 | 13,860 | -15.20 | 52,524 | | Net Profit Attributable to Parent (Million TWD) | 5,313 | 283.02 | 9,797 | -23.40 | 41,564 | | EPS (TWD) | 7.15 | 282.53 | 13.19 | -23.40 | 55.96 |

4. Material events under Article 4 of the Taiwan Stock Exchange's Procedures for Verification and Public Disclosure of Material Information by Listed Companies: None. 5. Material information briefing under Article 11 of the same Procedures: None. 6. For complete financial information, please visit the MOPS (Market Observation Post System). 7. Other remarks: None.