Wistron Announces Capital Increase in Subsidiary WisLab EMS Corporation

Disclosure Date: 1150627 Statement Date: 1150626 Statement Time: 154827 Company Code: 3231 Company Name: Wistron Subject: Board Resolution to Increase Capital in Subsidiary WisLab EMS Corporation (abbreviated as WisLab) Compliance Clause: Clause 20 Factual Date: 1150626

1. Name and Nature of the Subject (if preferred shares, specify issuance terms such as dividend rate): Equity in WisLab EMS Corporation

2. Factual Date: 115/6/26 ~ 115/6/26

3. Board Approval Date: June 26, 2026 (Minguo Year 115)

4. Other Approval Dates: Not applicable

5. Transaction Quantity, Unit Price, and Total Amount: Transaction amount: USD 150,000 thousand

6. Counterparty and Relationship with the Company (if the counterparty is an individual and not a related party, name disclosure may be omitted): Counterparty: WisLab EMS Corporation Relationship: 100% owned subsidiary of the Company

7. If the counterparty is a related party, disclose the reason for selecting such party, previous transferor, relationship among previous transferor, the Company, and the counterparty, transfer date, and amount: Reason for selecting related party: The Company holds 100% of its shares

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

9. Matters related to disposal of receivables (including types of collateral attached to disposed receivables; if receivables are from related parties, disclose names and book value of receivables disposed): Not applicable

10. Gain (or loss) from disposal (not applicable for acquisition of securities) (for originally deferred gains, list recognition status): Not applicable

11. Delivery or Payment Terms (including payment period and amount), Contractual Restrictions, and Other Important Agreements: Payment via wire transfer

12. Decision-Making Method, Reference Basis for Pricing, and Decision-Making Unit: Approved by the Board of Directors

13. Net Asset Value per Share of the Target Company for Acquisition or Disposal of Securities: Not applicable

14. Cumulative Holdings (including this transaction) in terms of quantity, amount, ownership percentage, and restricted rights (e.g., pledge status) to date: Amount: USD 212,100 thousand Ownership percentage: 100%

15. Proportion of securities investments listed under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' (including this transaction) to total assets and equity attributable to owners of the parent in the latest financial statements, and the amount of working capital in the latest financial statements (Note 2): Percentage of total assets: 23.45% Percentage of equity attributable to owners of the parent: 110.09% Working capital amount: TWD 36,703,467 thousand

16. Broker and Brokerage Fees: None

17. Specific Purpose or Use of Acquisition or Disposal: To meet the operational development and strategic planning needs of the subsidiary

18. Dissenting Director Opinions on this Transaction: None

19. This Transaction is a Related-Party Transaction: Yes

20. Date of Supervisor Acknowledgment or Audit Committee Approval: June 26, 2026 (Minguo Year 115)

21. Auditor's Unreasonable Opinion on this Transaction: Not applicable

22. Auditor Firm Name: Not applicable

23. Auditor Name: Not applicable

24. Auditor License Number: Not applicable

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

26. Business Model Change Explanation: Not applicable

27. Transaction Status with Counterparty in the Past Year and Expected in the Next Year: Not applicable

28. Source of Funds: Internal funds

29. Previous Material Information Disclosure Date for the Same Event: Not applicable

30. Other Statements: None