[Supreme] Announcement of Cash Dividend Ex-Dividend Date, Payment Date, and Suspension Period for Domestic 10th Unsecured Convertible Bonds and Adjustment of Cash Dividend Rate per Share

1. Board of directors, shareholders' meeting resolution or company decision date: 115/06/08 2. Type of ex-rights/ex-dividend: Ex-dividend 3. Type and amount of common stock dividends: Cash dividend - total amount NT$1,985,000,000, distributed NT$3.80054831 per share. 4. Ex-dividend trading date: 115/07/06 5. Last book closure date: 115/07/07 6. Book closure start date: 115/07/08 7. Book closure end date: 115/07/12 8. Ex-dividend record date: 115/07/12 9. Last bond conversion application date: 115/06/12 10. Bond conversion suspension start date: 115/06/16 11. Bond conversion suspension end date: 115/07/12 12. Common stock cash dividend payment date: 115/08/07 13. Other matters: (1) Cash dividends will be paid by remittance or check: By remittance: Credited to shareholders' bank accounts on August 7, 2026. If no remittance account, by check: The check will be sent by registered mail, endorsed "non-negotiable," by the stock agency department of Capital Securities Corporation. If the dividend amount is insufficient for remittance or registered mail, the check will be sent by regular mail. (2) Common shareholders recorded on the ex-dividend record date are entitled to cash dividends according to their shareholding ratio. If subsequent events such as share buybacks, treasury stock transfers, cancellations, or issuance of new shares due to convertible bond conversions affect the number of outstanding shares, the dividend rate may be adjusted. The chairman is authorized to adjust the dividend rate based on the number of outstanding common shares and to adjust the conversion price of the domestic 10th unsecured convertible bonds in accordance with the conversion terms. (3) Due to applications by holders of the domestic 10th unsecured convertible bonds to convert into common shares, the number of outstanding common shares increased, and the board authorized the chairman to adjust the dividend rate.