[AOC] Announcement of Board of Directors' Decision on Ex-Dividend Record Date

1. Date of Board of Directors, Shareholders' Meeting Resolution, or Company Decision: 115/06/09 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 Dividend for Common Stock: Cash dividend for common stock will be distributed at NT$1.2 per share, totaling NT$732,000,000. 4. Ex-rights/Ex-dividend Trading Date: 115/06/25 5. Last Day for Transfer of Shares: 115/06/28 6. Start Date of Book Closure: 115/06/29 7. End Date of Book Closure: 115/07/03 8. Ex-rights/Ex-dividend Record Date: 115/07/03 9. Last Application Date for Bond Conversion: Not applicable 10. Start Date of Bond Conversion Suspension: Not applicable 11. End Date of Bond Conversion Suspension: Not applicable 12. Payment Date for Common Stock Cash Dividend: 115/07/29 13. Other Matters to be Notified: In accordance with the resolution of the company's Board of Directors on 115/03/04, the authority to set the ex-dividend record date and related matters for cash dividends is delegated to the Chairman.