[Run Long] Announcement of the Board of Directors' resolution to conduct a cash capital reduction

1. Date of board resolution: 2026/04/22 2. Reason for capital reduction: To adjust capital structure and improve ROE by refunding cash to shareholders. 3. Amount of capital reduction: TWD 1,786,063,500 4. Shares cancelled: 178,606,350 shares 5. Capital reduction ratio: 20% 6. Paid-in capital after reduction: TWD 7,144,253,930 7. Scheduled date of shareholders' meeting: 2026/06/09 8. Estimated listed common shares after reduction: 714,425,393 shares 9. Ratio of listed shares to issued shares after reduction: 100% 10. Countermeasures for low liquidity: N/A 11. Record date for capital reduction: To be determined by the Chairman after shareholders' meeting approval and regulatory clearance. 12. Other matters: (1) Shareholders will receive 800 new shares for every 1,000 shares held (a reduction of 200 shares), plus a cash refund of TWD 2 per share. Fractional shares will be paid in cash. (2) New shares will be issued in scripless form with the same rights as original shares. (3) The Chairman is authorized to handle operational details and adjust the ratio if outstanding shares change due to regulations or other factors.