Nanya Technology Board Approves Disposal of Common Shares in Buding Technology Co., Ltd.

1. Name and nature of the subject matter (if preferred shares, specify issuance terms such as dividend rate): Common shares of Buding Technology Co., Ltd. ("Buding Company")

2. Date on which the event occurred: August 5, 2026 ~ August 5, 2026

3. Date of board approval: August 5, 2026 (Republic Era Year 115)

4. Other approval dates: Not applicable

5. Transaction quantity, unit price, and total transaction amount: - Transaction quantity: 715,000 shares - Unit price: No less than TWD 545 per share - Total transaction amount: No less than TWD 389,675,000

6. Counterparty and its relationship with the company (if individual and not a related party, name may be omitted): Sponsor securities firm assisting Buding Company’s listing

7. If counterparty is a related party, reason for selection, prior owner, relationships, transfer date, and amount: Not applicable

8. If ownership within the past five years involved a related party of the company, disclose acquisition/disposal date, price, and relationship at the time: Not applicable

9. Matters related to disposal of receivables (including types of collateral; if receivable from a related party, disclose name and book value): Not applicable

10. Gain (or loss) from disposal (not applicable if acquiring securities; deferred gains should be detailed): Estimated gain of approximately TWD 360 million based on minimum transaction price of TWD 545 per share

11. Delivery or payment terms (period and amounts), contractual restrictions, and other important provisions: As stipulated in the agreement

12. Decision-making method, reference basis for pricing, and decision-making body: - Reference basis: Recent audited financial statements of Buding Company - Fairness opinion: Issued by Li-Cheng Certified Public Accountants - Decision-making body: Board of Directors of Nanya Technology

13. Net asset value per share of the securities issuer: TWD 29.74

14. Cumulative holdings (including this transaction) of the securities: quantity, book value, ownership percentage, and restricted rights (e.g., pledge status): - Total holding quantity: 20,496,840 shares - Book value: TWD 866,000,000 - Ownership percentage: Approximately 33.96% - Restricted rights: None

15. Proportion of securities investments (including this transaction) under Article 3 of the "Asset Acquisition and Disposition Rules for Publicly Issued Companies" relative to total assets and equity attributable to parent owners in the latest financial statements, and operating capital: - Ratio to total assets: 40.6% - Ratio to equity: 48.8% - Operating capital: TWD 177,246,000,000

16. Broker and brokerage fees: Not applicable

17. Specific purpose or use of the acquisition or disposal: To support Buding Company’s upcoming application for listing on the GreTai Securities Market (GTSM), Nanya Technology plans to transfer part of its shares to the sponsor securities firm for market-making purposes.

18. Dissenting opinions from directors regarding this transaction: None

19. Is this a related-party transaction? No

20. Date of auditor confirmation or audit committee approval: August 5, 2026 (Republic Era Year 115)

21. Did the accountant issue a non-reasonable opinion? No

22. Name of accounting firm: Li-Cheng Certified Public Accountants

23. Name of accountant: Ku Chia-Wei

24. CPA license number: Taipei City CPA Certificate No. 3311

25. Does this involve a change in business model? No

26. Explanation of business model change: Not applicable

27. Transaction history with the counterparty in the past year and expected in the next year: Not applicable

28. Source of funds: Not applicable

29. Previous material information disclosure date for the same event: Not applicable

30. Other disclosures: None