6239 Powertech Technology

Announcement Date: July 8, 2026 Statement Date: July 7, 2026 Statement Time: 15:28:43 Company Code: 6239 Company Name: Powertech Technology Subject: Announcement on behalf of subsidiary Jingtai Cheng Technology Co., Ltd. regarding the purchase of equipment Applicable Clause: Clause 20 Factual Date: July 7, 2026

1. Name and nature of the subject matter (e.g., land located in Section XX, Subsection XX, North District, Taichung City): Testing equipment.

2. Factual date: June 22, 2026 ~ July 7, 2026

3. Board approval date: Not applicable

4. Other approval dates: Approval level: Chairman July 7, 2026 (Minguo Year 115)

5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: One batch; total transaction amount: NT$647,484,704.

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

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

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

9. Estimated gain (or loss) on disposal (not applicable for asset acquisition) (if deferred, provide a table showing recognition): Not applicable.

10. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: Payment terms shall be as specified in the procurement contract (purchase order).

11. Decision method for this transaction (e.g., bidding, comparison, or negotiation), reference basis for price determination, and decision-making unit: Procurement was conducted through comparison and negotiation in accordance with the company’s procurement procedures, approved by authorized management.

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

13. Name of professional appraiser: Not applicable.

14. License number of professional appraiser: Not applicable.

15. Whether the appraisal report is for a limited price, specific price, or special price: No or not applicable

16. Whether an appraisal report has not yet been obtained: Yes

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

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

19. Name of auditor firm: Not applicable.

20. Name of auditor: Not applicable.

21. Auditor license number: Not applicable.

22. Broker and brokerage fees: Not applicable.

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

24. Opinion of any director who objected to this transaction: Not applicable.

25. This transaction is a related-party transaction: No

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

27. This transaction involves acquiring real estate or right-of-use assets from a related party: No

28. Valuation price under Article 16 of the "Asset Acquisition and Disposal Rules for Publicly Issued Companies": Not applicable

29. Valuation price under Article 17 if the valuation under the previous item is lower than the transaction price: Not applicable

30. Previous date of material information disclosure on the same event: Not applicable

31. Other explanatory matters: None.