[Central Development] Announcement of the Company's Resolution to Dispose of Securities

1. Securities Name: Nanya Technology Common Stock 2. Transaction Date: May 7, 2026 ~ May 11, 2026 3. Board Approval Date: Not applicable 4. Other Approval Date: Approval Level: Chairman's Approval May 11, 2026 5. Transaction Quantity, Price Per Unit, and Total Transaction Amount: Transaction Quantity (K shares): 1,620 Price Per Unit (NTD): 287.78 Total Transaction Amount (NTD): 466,203,746 6. Disposal Profit (or Loss) (Not applicable for acquisition of securities): Disposal Profit: NT$68,307,522 7. Relationship with the target company: None 8. Cumulative holdings of this transaction's securities (including current transaction) up to now, amount, shareholding ratio, and conditions restricting rights (e.g., pledge status): Remaining Balance: 3,333,000 shares, Amount: NT$758,310,719 Shareholding Ratio: 0.10%, Conditions restricting rights: None 9. Up to now, the ratio of investments in securities listed in Article 3 of the "Rules Governing the Acquisition or Disposal of Assets by Public Companies" (including the current transaction) to the company's total assets and equity attributable to owners of the parent company in the most recent financial statements, and the amount of working capital in the most recent financial statements: Ratio to Total Assets: 76.03% Ratio to Equity Attributable to Owners of the Parent Company: 106.49% Working Capital Amount: NT$8,285,327 K 10. Specific purpose of acquisition or disposal: Investment Portfolio 11. Opinions of dissenting directors on this transaction: None 12. Is this transaction a related party transaction: No 13. Transaction counterparty and its relationship with the company: Not applicable 14. Date of approval by supervisors or audit committee: Not applicable 15. Date of previous announcement of material information on the same event: Not applicable 16. Other matters to be stated: Authorized on March 31, 2026, the authorized trader may conduct securities transactions in the centralized trading market during the second quarter of 2026.