【Phoenix Silicon International Corp.】Announcement of the Company's 2026 Ex-dividend Record Date and Convertible Bond Conversion Suspension Period

1. Date of resolution by the board of directors, shareholders' meeting, or company decision: 2026/05/18 2. Type of ex-rights or ex-dividend (please fill in 'ex-rights', 'ex-dividend', or 'ex-rights and ex-dividend'): Ex-dividend 3. Type and amount of dividends for common stock: Cash dividend of NT$490,792,641, with NT$2.8 per share. 4. Ex-rights (ex-dividend) trading date: 2026/06/12 5. Last transfer date: 2026/06/15 6. Start date of transfer suspension: 2026/06/16 7. End date of transfer suspension: 2026/06/20 8. Ex-rights (ex-dividend) record date: 2026/06/20 9. Last date for bond conversion application: 2026/05/22 10. Start date of bond conversion suspension: 2026/05/26 11. End date of bond conversion suspension: 2026/06/20 12. Payment date of cash dividend for common stock: 2026/07/10 13. Other notes: None.