3231 Wistron: Subsidiary Updates Investment in Kaohsiung Facility, Total Budget Reaches NT$5.65 Billion

Release Date: 1150627 Statement Date: 1150626 Statement Time: 160503 Company Code: 3231 Company Name: Wistron Subject: [Update] Announcement on behalf of subsidiary Kaohsiung Opto Electronics Technology Co., Ltd. (KOE) Planning to construct a factory-office building at Site B3 of the Cianjhen Technology Industrial Park via a land lease and commissioned construction arrangement. Relevant Clause: Clause 20 Event Date: 1150626 Details: 1. Type of Contract: Land Lease and Commissioned Construction 2. Event Date: June 26, 115 (2026) 3. Board Approval Date: June 26, 115 (2026) 4. Other Approval Dates: Not applicable 5. Counterparty and Relationship to Company: Not yet determined 6. Main Contract Contents (including total contract value, expected investment amount, and contract start/end dates), restrictions, and other important terms: Due to practical requirements regarding factory structure and premium interior finishes, an additional budget of NT$2,311 million is proposed, bringing the cumulative construction expenditure to NT$5,650 million. 7. Name of Professional Appraisal Firm or Company and Appraisal Results: Not applicable 8. Name of Real Estate Appraiser: Not applicable 9. License Number of Real Estate Appraiser: Not applicable 10. Specific Purpose of Acquisition: To meet business development and strategic planning needs 11. Dissenting Director Opinions on This Transaction: Not applicable 12. Is This a Related-Party Transaction? No 13. Date of Supervisor Approval or Audit Committee Consent: June 26, 115 (2026) 14. Is the Appraisal Report a Restricted, Specific, or Special Price? No or Not applicable 15. Has an Appraisal Report Not Yet Been Obtained? No or Not applicable 16. Reason for Not Yet Obtaining Appraisal Report: Not applicable 17. Reasons for Significant Differences in Appraisal Results and Auditor's Opinion: Not applicable 18. Name of Accounting Firm: Not applicable 19. Name of Auditor: Not applicable 20. Auditor's License Number: Not applicable 21. Previous Material Information Disclosure Date for the Same Event: This is an update to the announcement made on January 19, 111 (2022) regarding the subsidiary Kaohsiung Opto Electronics Technology Co., Ltd. (KOE) planning to construct a factory-office building at Site B3 of the Cianjhen Technology Industrial Park via a land lease and commissioned construction model. 22. Other Disclosures: The counterparties for civil construction and electrical & mechanical works were announced on June 16, 112 (2023) and January 5, 113 (2024), respectively.