Yageo Subsidiary Dongguan Kionix Electronics Co., Ltd. Announces Acquisition of Wealth Management Product

1. Name and nature of the subject matter (if preferred shares, specify issuance terms such as dividend rate): China Construction Bank Structured Wealth Management Product

2. Date of occurrence: June 16, 2026 – July 21, 2026

3. Board approval date: Not applicable

4. Other approval dates: Approval level: Not applicable July 21, 2026

5. Transaction quantity, unit price, and total transaction amount: Number of units, unit price: Not applicable Total transaction amount: RMB 80,000,000

6. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party of the company, name disclosure may be omitted): Counterparty: China Construction Bank Relationship with the company: None

7. If the counterparty is a related party, state the reason for selecting the related party as the transaction party, the previous transferor, the relationship between the previous transferor and the company and the counterparty, the previous transfer date, and transfer amount: Not applicable

8. If the ownership of the subject matter was held by a related party of the company within the past five years, disclose the related party’s acquisition and disposal date, price, and relationship with the company at the time: Not applicable

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

10. Gain (or loss) from disposal (not applicable for acquisition of securities) (if previously deferred, explain recognition in table form): Not applicable

11. Delivery or payment terms (including payment period and amount), contractual restrictions, and other important agreements: Paid in full

12. Method of determining the transaction, reference basis for pricing, and decision-making unit: Based on the company’s internal approval authority

13. Net asset value per share of the securities-issuing company acquired or disposed: Not applicable

14. Cumulative amount, value, ownership percentage, and rights restrictions (e.g., pledge status) of the securities held to date (including this transaction): Cumulative holding amount: RMB 60,000,000 Rights restrictions: None

15. Cumulative securities investments (including this transaction) under Article 3 of the “Regulations on the Acquisition or Disposition of Assets by Publicly Issued Companies” as a percentage of 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: Percentage of total assets: 0.08% Percentage of equity attributable to owners of the parent: 0.17% Working capital in latest financial statements: NT$ -76,476,038 thousand

16. Broker and brokerage fees: Not applicable

17. Specific purpose or use of the acquisition or disposal of securities: Investment and wealth management

18. Dissenting opinions from directors regarding this transaction: None

19. Is this transaction a related-party transaction? No

20. Date of auditor approval or audit committee consent: Not applicable

21. Did the accountant issue a non-reasonable opinion on this transaction? Not applicable

22. Name of the accounting firm: Not applicable

23. Name of the accountant: Not applicable

24. Accountant’s license number: Not applicable

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

26. Explanation of business model change: Not applicable

27. Transaction status with the counterparty in the past year and expected in the next year: Not applicable

28. Source of funds: Not applicable

29. Previous date of material information disclosure on the same event: Not applicable

30. Other explanatory matters: None