Richtek Technology Announces Acquisition of Semiconductor Manufacturing Facilities and Equipment

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

2. Date of occurrence: 115/5/22 ~ 115/6/16

3. Board approval date: Not applicable

4. Other approval dates: Approval level: General Manager June 16, 115 (2026)

5. Quantity of transaction units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Quantity: One batch Unit price: As mutually agreed Total transaction amount: NT$1,036,524 thousand (approximately NT$1.037 billion)

6. Counterparty and its relationship with the company (if the counterparty is a natural person and not a related party, name disclosure may be omitted): Counterparty: Lam Research International Sdn Bhd Relationship with the company: None

7. If the counterparty is a related party, state the reason for selecting them, previous owner, relationship among previous owner, company, and counterparty, previous 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 related party’s acquisition and disposal date, price, and 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 period and amount), contractual restrictions, and other important agreements: (1) Delivery or payment terms: As mutually agreed (2) Contractual restrictions and other important agreements: None

11. Method of transaction decision (e.g., bidding, price comparison, negotiation), basis for price determination, and decision-making unit: Method: Price comparison and negotiation Basis for price determination: Based on quotations from the original manufacturer and other vendors, after comparison and negotiation, finalized by the procurement and user departments within their approval authority Decision-making unit: General Manager

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, specific, or special price: No or not applicable

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

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

18. If there is a significant difference in appraisal results, explain the reason and include 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: None

23. Specific purpose or use of the acquisition or disposal: For use in wafer product manufacturing

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

25. Whether this is a related-party transaction: No

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

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

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

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

30. Previous date of major information disclosure regarding the same event: Not applicable

31. Other explanatory matters: None.