1101 TCC - Adjusts Transaction Structure to Fully Acquire CGH Equity

Release Date: July 10, 2026 Statement Date: July 9, 2026 Statement Time: 18:42:53 Company Code: 1101 Company Name: Taiwan Cement Corporation (TCC) Subject: Supplemental Explanation on Adjustment of Transaction Structure for CGH Equity Acquisition Announced on February 27, 2025 Applicable Clause: Item 51 Factual Date: July 9, 2026

Explanation: 1. Factual Date: July 9, 2026 2. Company Name: Taiwan Cement Corporation 3. Relationship with Company (Enter '本公司' or 'Subsidiary'):本公司 (Parent Company) 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: Cimpor Global Holdings B.V. (hereinafter 'CGH') was originally a joint venture company in which TCC, through its subsidiary TCC Dutch Holdings B.V., held a 40% stake. CGH served as a holding platform for TCC and OYAK Capital's joint investments in cement businesses in Turkey and Portugal. Subsequently, TCC completed the acquisition of control over Cimpor Portugal and Oyak Cimento. The ownership of related Turkish assets has been transferred to a newly established joint venture, TCC OYAK AMSTERDAM B.V. As a result, CGH no longer serves its original function as a holding platform.

6. Response Measures: To align with the group's European regional business integration and future fundraising strategies in European capital markets, TCC plans to restructure the equity framework of its European business cluster to integrate resources and simplify the group's corporate structure. Accordingly, TCC will have its 100%-owned European subsidiary acquire the 60% equity in CGH held by its former joint venture partner, OYAK Capital. Upon completion, CGH will become a wholly-owned subsidiary of TCC, with an estimated transaction value of approximately €64.7 million. Going forward, TCC will proceed with further adjustments to shareholding and capital structures in accordance with the group's overall strategic plan, supporting European business integration and continuously optimizing resource allocation and capital efficiency across the group.

7. Other Matters to be Disclosed (If the subject of the event or resolution is a publicly listed company or above, this material information also meets Item 9, Article 7 of the Enforcement Rules of the Securities and Exchange Act, regarding matters having significant impact on shareholders' rights or securities prices): This transaction will be implemented by the relevant subsidiaries in compliance with local legal procedures, as stated herein.