Alchip-KY: Subsidiary Alchip Investment Inc. Announces Acquisition of Shares in SiPearl SAS

1. Name and Nature of the Subject Matter (for preferred shares, the agreed terms of issue, such as dividend rate, should also be indicated): Shares of SiPearl SAS 2. Date of Occurrence of the Event: 2026/5/8 ~ 2026/5/8 3. Date of Approval by the Board of Directors: May 8, 2026 (Republic of China calendar year 115) 4. Other Resolution Dates: Not applicable 5. Quantity, Unit Price, and Total Transaction Amount: Total transaction amount: EUR 8,000,000 6. Counterparty and its Relationship with the Company (If the counterparty is a natural person and not a related party of the company, disclosure of their name may be omitted): Counterparty: SiPearl SAS Relationship with the company: None 7. If the counterparty is a related party, the reason for selecting the related party as the transaction object, the previous owner, the relationship between the previous owner and the company and the counterparty, the date of the previous transfer, and the transfer amount should also be announced: Not applicable 8. If the owner of the transaction target was a related party of the company within the past five years, the acquisition and disposal dates, prices, and relationship with the company at the time of the transaction for the related party should also be announced: Not applicable 9. Matters related to the disposal of receivables (including the type of collateral attached to the disposed receivables, if the disposed receivables belong to related party receivables, the name of the related party and the book value of the related party's receivables in this disposal need to be announced): Not applicable 10. Disposal gain (or loss) (not applicable for acquisition of marketable securities) (if deferred, list and explain the recognition status): Not applicable 11. Delivery or Payment Terms (including payment period and amount), Contractual Restrictions, and Other Important Covenants: Payment by wire transfer 12. Method of determining this transaction, reference basis for price determination, and decision-making unit: Resolved by the Board of Directors 13. Net asset value per share of the acquired or disposed marketable securities target company: Not applicable 14. As of now, the accumulated quantity, amount, shareholding ratio, and restrictions on rights (such as pledging) of these securities (including this transaction): Amount: EUR 8,000,000 15. As of now, the proportion of investment in marketable securities (including this transaction) listed in Article 3 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies" to the total assets and equity attributable to owners of the parent company in the company's most recent financial report, and the working capital amount in the most recent financial report (Note 2): Proportion of total assets: 0.5% Proportion of equity attributable to owners of the parent company: 0.69% Working capital: NTD 38,658,772 thousand 16. Broker and brokerage fees: Not applicable 17. Specific purpose or use of acquisition or disposal: Company's overall operational development strategy 18. Opinions of dissenting directors on this transaction: None 19. Is this transaction a related party transaction: No 20. Date of approval by supervisors or audit committee: May 8, 2026 (Republic of China calendar year 115) 21. Accountant's non-reasonable opinion on this transaction: Not applicable 22. Accounting firm name: Not applicable 23. Accountant's name: Not applicable 24. Accountant's practice certificate number: Not applicable 25. Does it involve changes in operating model: No 26. Explanation of changes in operating model:

27. Transaction status with the counterparty in the past year and expected next year: Not applicable 28. Source of funds: Not applicable 29. Date of major announcement previously issued for the same event: Not applicable 30. Other matters to be specified: None Keywords: Material Information