Taiwan Cement Corporation to Participate in Yuanta Securities' Investor Briefing Session

Release Date: June 25, 2026 Speaking Date: June 24, 2026 Speaking Time: 14:17:33 Company Code: 1101 Company Name: Taiwan Cement Corporation Subject: The company has been invited to participate in an investor briefing hosted by Yuanta Securities. Applicable Clause: Clause 12 Factual Date: June 26, 2026

Details: Falls under Clause 4, Item XX: 12 Factual Date: June 26, 2026

1. Date of Investor Briefing: June 26, 2026 2. Time of Investor Briefing: 2:00 PM 3. Venue of Investor Briefing: 11th Floor, No. 219, Section 3, Nanjing East Road, Taipei City 4. Summary of Investor Briefing: The company has been invited to attend an investor briefing hosted by Yuanta Securities. During the session, TCC will present an overview of its business operations, ESG initiatives, and future development outlook. 5. Other Disclosures: None

For complete financial and business information, please visit the public information observation station and refer to the investor briefing schedule or the investor presentation section.