Winbond Electronics Announces Purchase of Equipment for Business Use

1. Name and nature of the subject matter (e.g., land located at Section XX, Subsection XX, North District, Taichung City): Machinery and equipment for business operations.

2. Date on which the event occurred: March 26, 2026 ~ September 23, 2026

3. Date approved by the Board of Directors: August 6, 2026

4. Other approval dates: Not applicable

5. Quantity of units transacted (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: A batch of machinery and equipment; cumulative total transaction amount is NT$1,595,056,555.

6. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party of the company, name disclosure may be omitted): KLA Corporation; relationship with the company: None.

7. If the counterparty is a related party, state the reason for selecting such party, previous transferor, relationships among the previous transferor, the company, and the counterparty, date of previous transfer, and transfer amount: Not applicable

8. If the owner of the subject asset was a related party of the company within the past five years, disclose the date and price of acquisition/disposal and the relationship with the company at the time: Not applicable

9. Estimated gain (or loss) from disposal (not applicable for asset acquisition); if deferred, provide details of recognition: Not applicable

10. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: Payment according to purchase order terms.

11. Decision method for this transaction (e.g., bidding, comparison, negotiation), reference basis for pricing, and decision-making unit: Approved following negotiation and evaluation in accordance with the company's 'Procedures for Acquisition or Disposition of Assets'.

12. Name of professional appraisal firm or company and appraised value: Not applicable

13. Name of professional appraiser: Not applicable

14. License number of professional appraiser: Not applicable

15. Whether the appraisal report indicates a restricted, specific, or special price: No or Not applicable

16. Whether an appraisal report has not yet been obtained: No or Not applicable

17. Reason for not obtaining the appraisal report: Not applicable

18. Reasons for significant discrepancies in appraisal results and auditor’s opinion: Not applicable

19. Name of accounting firm: Not applicable

20. Name of accountant: Not applicable

21. License number of accountant: Not applicable

22. Broker and brokerage fees: Not applicable

23. Specific purpose or use of the acquisition or disposition: For production use.

24. Opinion of any director who expressed dissent regarding this transaction: Not applicable

25. Is this a related-party transaction? No

26. Date of supervisor approval or audit committee consent: Not applicable

27. Does this transaction involve acquiring real estate or right-of-use assets from a related party? No

28. Valuation under Article 16 of the 'Regulations Governing the Acquisition or Disposition of Assets by Publicly Issued Companies': Not applicable

29. Valuation under Article 17 of the same regulations when the valuation in the preceding item is lower than the transaction price: Not applicable

30. Previous date on which material information on the same event was disclosed: Not applicable

31. Other explanatory matters: This matter was approved by the board of directors on May 5, 2025; August 5, 2025; October 27, 2025; February 10, 2026; and August 6, 2026, with capital expenditure material information released on the day following each meeting.