Taiwan Surface Mounting Technology Announces March 2026 Consolidated Revenue of NT$4.215 Billion

1. Date of occurrence of the event: 2026/04/07 2. Company name: Taiwan Surface Mounting Technology Corp. 3. Relationship with the company (please enter "the company" or "subsidiary"): The company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: Monthly revenue announcement 6. Countermeasures: Not applicable 7. Other matters that need to be specified (if the subject of the event or resolution is a public company or above, this material information also complies with Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act, which stipulates matters that have a significant impact on shareholders' equity or securities prices): (1) Consolidated operating revenue (comparison of current month with same month last year) (Unit: NT$ thousand) Item | March 2025 | March 2026 | Growth Rate % Consolidated Revenue | 4,328,458 | 4,214,612 | -2.63% (2) Consolidated operating revenue (comparison of current month with previous month) (Unit: NT$ thousand) Item | February 2026 | March 2026 | Growth Rate % Consolidated Revenue | 3,786,737 | 4,214,612 | 11.30% (3) Cumulative consolidated operating revenue (Unit: NT$ thousand) Item | Jan-Mar 2025 | Jan-Mar 2026 | Growth Rate % Consolidated Revenue | 12,414,354 | 12,555,084 | 1.13% (4) The above figures are self-reported by the company and have not been audited or reviewed by an accountant.