Subsidiary MiTAC Information Systems Corp. Acquires Real Estate Usage Rights in California

Disclosure Date: June 19, 115 (2026) Statement Date: June 18, 115 (2026) Statement Time: 14:13:12 Company Code: 3706 Company Name: MiTAC Subject: Announcement on behalf of subsidiary MiTAC Information Systems Corp. regarding acquisition of real estate usage rights Compliance Clause: Article 20 Event Date: June 18, 115 (2026)

Details: 1. Name and nature of the asset (e.g., land located in Section X, Subsection X, North District, Taichung City): Two buildings in California, USA

2. Event Date: June 18, 115 (2026) to June 18, 115 (2026)

3. Board Approval Date: June 18, 115 (2026)

4. Other Approval Dates: Not applicable

5. Quantity of units (e.g., square meters, converted to ping), unit price, and total transaction amount: Unit Quantity: 236,945 square feet of building space Monthly Rent: Adjusted based on leased area—USD 24,583.20/month for months 1–5, USD 164,912.30/month in month 6, USD 197,195.90/month for months 7–11, USD 381,481.45/month in month 12, with annual adjustments thereafter based on inflation. Right-of-Use Asset Amount: USD 22,693,777.86

6. Counterparty and its relationship with the company (if individual and not a related party, name may be omitted): Counterparty: B9 SEQUOIA WIEGMAN OWNER LP Relationship: Not a related party

7. If counterparty is a related party, reason for selection, prior transferor, relationship between prior transferor, company, and counterparty, transfer date, and amount: Not applicable

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

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

10. Delivery or payment terms (including payment schedule and amounts), contractual restrictions, and other important clauses: (1) Payment Terms: Monthly payments (2) Term: August 1, 115 (2026) to June 30, 121 (2032) (3) Contractual restrictions and other important clauses: None

11. Transaction determination method (e.g., bidding, comparison, negotiation), pricing reference basis, and decision-making unit: (1) Transaction Method: Negotiation (2) Pricing Reference: Professional appraisal report and regional market conditions (3) Decision-Making Unit: Board of Directors

12. Name of appraisal firm and appraised value: Appraisal Firm: Chung-Ting Real Estate Appraiser Office Appraised Value of Right-of-Use Asset: USD 22,722,000

13. Name of Appraiser: Chien Wu-Chi, Chung-Ting Real Estate Appraiser Office

14. Appraiser License Number: Chung-Ting Real Estate Appraiser Office (100) Taipei Appraisal No. 000172

15. Whether appraisal report is limited, specific, or special pricing: No / Not applicable

16. Whether appraisal report not yet obtained: No / Not applicable

17. Reason for not obtaining appraisal report: Not applicable

18. Reasons for significant differences in appraisal results and auditor 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 acquisition or disposal: For operational needs of the company

24. Dissenting director opinions on the transaction: None

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 usage rights from a related party: No

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

29. Evaluation price under Article 17 if prior evaluation is lower than transaction price: Not applicable

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

31. Other explanatory matters: None