【Tung-Sheng】Announcement of the Ex-Dividend Date for the 115th Year

1. Date of Board of Directors, Shareholders' Meeting Resolution or Company Decision: 2026/06/15 2. Type of Ex-Rights, Ex-Dividend (Please fill in 'Ex-Rights', 'Ex-Dividend', or 'Ex-Rights and Dividend'): Ex-Dividend 3. Type and Amount of Cash Dividend for Common Shares: Cash dividend of NT$97,329,791 from capital surplus 4. Ex-Rights (Dividend) Trading Day: 2026/07/01 5. Last Transfer Day: 2026/07/02 6. Start Date of Transfer Suspension: 2026/07/03 7. End Date of Transfer Suspension: 2026/07/07 8. Ex-Rights (Dividend) Record Date: 2026/07/07 9. Last 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. Cash Dividend Payment Date for Common Shares: 2026/07/28 13. Other Matters to be Specified: The ex-dividend record date was determined by the Board of Directors on March 12, 2026.