Sinopec Announces Disposal of Securities Worth Over NT$300 Million Within One Year

1. Security Name: Chung-Kung Common Stock

2. Transaction Date: June 8, 2026 to July 2, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 2, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Transaction Quantity: Total 23,500,000 shares Unit Price: NT$13.09 Total Transaction Amount: NT$307,634,850

6. Gain (or Loss) on Disposal (not applicable for acquisition): The disposal involves financial assets measured at fair value through other comprehensive income. The result will be recorded in equity on the balance sheet and will not affect the company's current period profit or loss.

7. Relationship with the Target Company: Chung-Kung is one of the directors of the company.

8. Cumulative Holdings of the Security (including this transaction) to Date – Quantity, Amount, Ownership Percentage, and Restricted Rights (e.g., pledged shares): Remaining Holdings: 149,115,175 shares, Amount: NT$2,065,245,174, Ownership Percentage: 9.27%, Restricted Rights: 122,000,000 shares pledged.

9. Cumulative Securities Investments (including this transaction) under Article 3 of the 'Asset Acquisition or Disposal Rules for Publicly Issued Companies' as a percentage of total assets and equity attributable to owners of the parent in the most recent financial statements, and the amount of working capital: Percentage of Total Assets: 46.11% Percentage of Equity Attributable to Owners of the Parent: 70.24% Working Capital Amount: (NT$9,048,815) thousand

10. Specific Purpose of Acquisition or Disposal: To improve capital utilization efficiency.

11. Dissenting Director Opinions on this Transaction: Not applicable.

12. Whether this Transaction is a Related-Party Transaction: No

13. Counterparty and its Relationship with the Company: Not applicable.

14. Date of Supervisor Approval or Audit Committee Consent: Not applicable.

15. Previous Date of Material Information Disclosure on the Same Event: Not applicable.

16. Other Disclosures: None.