[Huang Hsiang] Announcement of acquisition of marketable securities

1. Name of securities: Nanya Technology Corporation 2. Trading date: 2026/05/13 ~ 2026/05/15 3. Date of board of directors resolution: N/A 4. Date of other approval: Approval level: Chairman's approval May 15, 2026 5. Trading volume, unit price, and total monetary amount of the transaction: Trading volume: 1,150,000 shares Average price per share: NT$ 322.12 Total monetary amount: NT$ 370,443 thousand 6. Gain (or loss) on disposal (not applicable for acquisition of securities): N/A 7. Relationship with the underlying company of the trade: None 8. Current cumulative volume, amount, and shareholding percentage of holdings of the security being traded (including the current trade) and status of any restriction of rights (e.g., pledges): Volume: 1,050,000 shares Amount: 339,885 thousand TWD Shareholding percentage: 0.034% 9. Current ratio of investment in securities (including the current trade) specified in Article 3 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies" to total assets and equity attributable to owners of the parent in the most recent financial statements, and working capital in the most recent financial statements: Ratio to total assets: 0.670% Ratio to equity attributable to owners of the parent: 2.481% Working capital: NT$ 14,739,777 thousand 10. Concrete purpose of the acquisition or disposal: To improve the utilization efficiency of the company's funds. 11. Any dissenting opinions of directors to the present transaction: N/A 12. Is this a related party transaction: No 13. Trading counterpart and its relationship with the company: N/A 14. Date of the board of independent directors' approval or date of the audit committee's agreement: N/A 15. Date of previous major message announcement for the same event: N/A 16. Any other matters that need to be specified: None