HIWIN Announces Disposal of Right-of-Use Asset with Related Party — Reduction in Leased Area

1. Name and nature of the subject property (e.g., land located at Section X, Minor Section X, North District, Taichung City): No. 7 Jingke 8th Road, Nantun District, Taichung City (partial first floor)

2. Date on which the fact occurred: 115/8/12 ~ 115/8/12

3. Date approved by the board of directors: August 12, 2026 (Minguo Year 115)

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: Transaction quantity: Leased area reduced by 142 ping Monthly rent: Reduced by NT$101,104 (excluding tax) per month Total transaction amount: Right-of-use asset decreased by NT$1,598,476

6. Counterparty and their relationship with the company (if the counterparty is an individual and not a related party of the company, name disclosure may be omitted): DAIHEN Micro Systems Corporation

7. If the counterparty is a related party, state the reason for selecting them, previous transferor, relationships among previous transferor, company, and counterparty, previous transfer date, and transfer amount: Reason for selecting related party as counterparty: Partial lease termination under original lease agreement Previous transferor, relationships, transfer date, and transfer amount: Not applicable

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

9. Estimated gain (or loss) from disposal (not applicable for asset acquisition) (for deferred gains, provide a table showing recognition schedule): Disposal gain: NT$20,242

10. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: Payment terms: Monthly rent is NT$116,768 (excluding tax) Lease term: From September 1, 2026 (Minguo 115) to December 31, 2027 (Minguo 116) Contractual restrictions and other important terms: None

11. Decision method for this transaction (e.g., bidding, quotation comparison, negotiation), reference basis for pricing, and decision-making unit: Reduction of lease scope under the original lease agreement

12. Name of professional appraiser 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 limited price, specific price, 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 appraisal report: Not applicable

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

19. Auditor firm name: Not applicable

20. Auditor name: 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: Due to operational planning requirements

24. Opinion of director(s) dissenting on this transaction: None

25. This transaction is a related-party transaction: Yes

26. Date of supervisor’s approval or audit committee’s consent: August 12, 2026 (Minguo Year 115)

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

28. Valuation amount pursuant to Article 16 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies': Not applicable

29. Valuation amount pursuant to Article 17 if the valuation under the preceding item is lower than transaction price: Not applicable

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

31. Other explanatory matters: None