[CTBC] Announcement Regarding Board Resolution on Capital Reduction via Repurchase and Cancellation of Restricted Employee Shares

1. Date of Board Resolution: May 22, 2026 2. Reason for Capital Reduction: Repurchase and cancellation of restricted shares as employees failed to meet vesting conditions. 3. Amount of Capital Reduction: 9,185,220 NTD 4. Number of Shares Eliminated: 918,522 shares 5. Ratio of Capital Reduction: 0.0046% 6. Paid-in Capital after Reduction: 201,768,883,810 NTD 7. Expected Date of Shareholders' Meeting: Not applicable 8. Number of listed common shares after reduction: Not applicable 9. Ratio of listed common shares after reduction: Not applicable 10. Measures for low liquidity: Not applicable 11. Record Date for Capital Reduction: May 25, 2026 12. Other matters: The record date is May 25, 2026. If changes are necessary due to actual operations, the board authorizes the Chairman to make adjustments.