Taiwan Surface Mounting Technology Reports NT$4.377 Billion in Consolidated Revenue for June 2026

1. Date of Event: July 6, 2026

2. Company Name: Taiwan Surface Mounting Technology Co., Ltd.

3. Relationship with Company (please enter本公司or Subsidiary):本公司

4. Cross-shareholding Ratio: Not applicable

5. Reason for Occurrence: Monthly revenue announcement

6. Response Measures: Not applicable

7. Other Matters to be Disclosed (If the entity of the event or resolution is a publicly issued company or above, this major information simultaneously meets the criteria under Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act, regarding matters that have a significant impact on shareholders' rights or securities prices):

(1) Consolidated Operating Revenue (Comparison of Current Month vs. Same Month Last Year) (Unit: NT$ Thousands)

Item June 2025 June 2026 Growth Rate% Consolidated Revenue 4,006,645 4,376,679 9.24%

(2) Consolidated Operating Revenue (Comparison of Current Month vs. Previous Month) (Unit: NT$ Thousands)

Item May 2026 June 2026 Growth Rate% Consolidated Revenue 4,348,041 4,376,679 0.66%

(3) Cumulative Consolidated Operating Revenue (Unit: NT$ Thousands)

Item Jan-Jun 2025 Jan-Jun 2026 Growth Rate% Consolidated Revenue 25,001,879 25,785,584 3.13%

(4) The above figures are self-calculated by the company and have not been audited or reviewed by accountants.