YaHong Electric Announces Ex-Dividend Date Set by Board of Directors

1. Date of board or shareholders' meeting resolution or company decision: 06/18/2026 (ROC 115) 2. Type of ex-rights or ex-dividend (please enter 'ex-rights', 'ex-dividend', or 'ex-rights and ex-dividend'): ex-dividend 3. Type and amount of cash dividend for common stock: NT$276,520,000, equivalent to a cash dividend of NT$3.1 per share 4. Ex-dividend trading date: 08/05/2026 (ROC 115) 5. Last transfer date: 08/06/2026 (ROC 115) 6. Start date of transfer suspension: 08/07/2026 (ROC 115) 7. End date of transfer suspension: 08/11/2026 (ROC 115) 8. Ex-dividend reference date: 08/11/2026 (ROC 115) 9. Final date for bond conversion application: 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 stock: 08/31/2026 (ROC 115) 13. Other matters to be disclosed: None