【Namchow】Announcement of Record Date and Payment Date for Cash Dividend

1. Date of resolution by the Board of Directors or Shareholders' Meeting or Company decision: 2026/05/13 2. Type of ex-rights/ex-dividend (please fill in "ex-rights", "ex-dividend", or "ex-rights and ex-dividend"): ex-dividend 3. Type and amount of cash dividends distributed for common shares: Cash dividend of TWD 1.6 per share, totaling TWD 470,612,739. 4. Ex-rights (ex-dividend) trading date: 2026/05/28 5. Last day for transfer registration: 2026/05/29 6. Start date for suspension of transfer registration: 2026/05/30 7. End date for suspension of transfer registration: 2026/06/03 8. Ex-rights (ex-dividend) record date: 2026/06/03 9. Last day for bond conversion application: Not applicable 10. Start date for suspension of bond conversion: Not applicable 11. End date for suspension of bond conversion: Not applicable 12. Payment date for common share cash dividend: 2026/06/26 13. Other matters to be specified: (1) Shareholders who have not yet completed transfer registration must personally visit or send by registered mail (based on postmark date) to the Company's share transfer agent, "CTBC Bank Agency Department" (Address: 5F, No. 83, Section 1, Chongqing S. Rd., Taipei City; Tel: (02)6636-5566) before 5:00 PM on May 29, 2026, to complete the transfer procedures. (2) The cash dividend will be distributed by the Company's share transfer agent, "CTBC Bank Agency Department," via remittance or registered mail check starting from June 26, 2026.