2421 Sunon: Announcement of Cash Dividend Record Date and Adjustment of Dividend Rate

1. Date of Board/Shareholders' resolution: 115/05/25. 2. Type of ex-rights/ex-dividend: Ex-dividend. 3. Type and amount of cash dividend: (1) Original: 1,498,968,180 TWD, 5.5 TWD per share. (2) Adjusted: 1,498,968,180 TWD, 5.24042062 TWD per share. 4. Ex-dividend trading date: 115/06/10. 5. Last transfer date: 115/06/11. 6. Book closure start date: 115/06/12. 7. Book closure end date: 115/06/16. 8. Ex-dividend record date: 115/06/16. 12. Cash dividend payment date: 115/07/02. 13. Other notes: Due to the issuance of new shares via cash capital increase, the number of outstanding shares has increased.