TCC Adjusts Conversion Price of First 2024 Offshore Unsecured Convertible Bonds

1. Date of Event: July 7, 2026 2. Company Name: Taiwan Cement Corporation 3. Relationship with Company (please enter '本公司' or 'Subsidiary'):本公司 (Parent Company) 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: In accordance with the issuance terms of the first 2024 offshore unsecured convertible bonds, the conversion price has been adjusted. 6. Response Measures: Effective July 7, 2026 (ex-dividend date), the conversion price of the first 2024 offshore unsecured convertible bonds will be adjusted from NT$37.35 to NT$36.11 per share. 7. Other Matters to be Disclosed (if the entity involved is a publicly listed company, this material information also qualifies as a matter under Article 7, Paragraph 9, Item 9 of the Enforcement Rules of the Securities and Exchange Act that significantly affects shareholders' rights or securities prices): None