【TCC】The Company's 2026 Annual Shareholders' Meeting will be broadcast live online in its entirety, in addition to in-person attendance, and shareholders can submit questions via the company's website before the meeting

1. Date of occurrence: 115/05/13 (May 13, 2026) 2. Company name: Taiwan Cement Corporation 3. Relationship with the company (please enter the company or subsidiary): The Company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: The Company's 2026 Annual Shareholders' Meeting will be broadcast live online in its entirety, in addition to in-person attendance. Shareholders and friends who care about the Company are welcome to watch online. If shareholders have any questions, please submit them through the Company's website before the meeting. 6. Countermeasures: The Company's online live broadcast instructions are as follows: I. You can watch by the following methods: (1) Online live broadcast link: https://youtube.com/live/apx-aV1qZ9Q?feature=share Or from (2) Company's official website -> Investor Relations section Or from (3) "TCC Group FB Fan Page - Taiwan Cement Corporation TCC" II. For any questions regarding the shareholders' meeting proposals or the Company's operations, shareholders are welcome to log in to this webpage https://campaign.tccgroupholdings.com/shareholders "before the meeting" to fill in your questions, and the Company will explain them collectively during the meeting. 7. Other explanatory matters (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 Exchange Act, which states matters that have a significant impact on shareholders' equity or securities prices): None. Keywords: Significant information