AES-KY Announces Ex-Dividend Date

1. Date of Board, Shareholders' Meeting Resolution or Company Decision: May 28, 2026 (Minguo Year 115)

2. Type of Ex-Rights/Ex-Dividend (please enter 'Ex-Rights', 'Ex-Dividend', or 'Ex-Rights-Ex-Dividend'): Ex-Dividend

3. Ordinary Share Cash Dividend Type and Amount: Cash dividend of TWD 1,631,498,698 to shareholders, equivalent to TWD 19.1 per share.

4. Ex-Dividend Trading Day: July 9, 2026 (Minguo Year 115)

5. Last Transfer Date: July 10, 2026 (Minguo Year 115)

6. Start Date of Transfer Suspension: July 11, 2026 (Minguo Year 115)

7. End Date of Transfer Suspension: July 15, 2026 (Minguo Year 115)

8. Ex-Dividend Reference Date: July 15, 2026 (Minguo Year 115)

9. Final Application Date for Bond Conversion: Not applicable

10. Start Date of Bond Conversion Suspension: Not applicable

11. End Date of Bond Conversion Suspension: Not applicable

12. Ordinary Share Cash Dividend Payment Date: August 5, 2026 (Minguo Year 115)

13. Other Matters to be Disclosed: Postage and remittance fees shall be borne by shareholders.