Lemtech Holdings-KY Announces Disposal of Subsidiary Equity via Subsidiary

1. Name and nature of the subject matter (if preferred shares, specify issuance terms such as dividend rate): Equity in Lemtech Precision Material (Czech) s.r.o.

2. Date of occurrence: June 8, 2026 ~ June 8, 2026

3. Board approval date: June 8, 2026

4. Other approval dates: Not applicable

5. Transaction quantity, unit price, and total transaction amount: Number of units and unit price: Not applicable Total transaction amount: Approximately USD 9,100,000 (actual amount subject to exchange rate on transaction date)

6. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party, name disclosure may be omitted): Counterparty: Lemtech International Limited Relationship with the company: Both Lemtech International Limited and Lemtech Precision Materials (China) Co., Ltd. are 100% subsidiaries of the parent company, Lemtech Holdings

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

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

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

10. Gain (or loss) from disposal (not applicable if acquiring securities; if deferred, explain recognition schedule): Not applicable

11. Delivery or payment terms (including payment period and amount), contractual restrictions, and other important agreements: (1) Delivery or payment terms: Both parties shall complete the settlement of the equity payment within the agreed period after signing the contract (2) Contractual restrictions and other important agreements: None

12. Decision-making method for the transaction, reference basis for pricing, and decision-making unit: (1) Decision-making method: Approved by board resolution, with subsequent full authority delegated to the Chairman (2) Pricing reference basis: Based on net asset value from recent internal financial statements and valuation reports issued by an asset appraisal company (3) Decision-making unit: Approved by board resolution

13. Net asset value per share of the securities-issuing company involved in the acquisition or disposal: Not applicable

14. Cumulative number, amount, ownership percentage, and rights restrictions (e.g., pledge status) of the securities (including this transaction) held to date: Cumulative quantity: Not applicable Cumulative amount: USD 9,100,000 (actual amount subject to exchange rate on transaction date) Ownership percentage: 100% Rights restrictions: None

15. Proportion of securities investments (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' to total assets and equity attributable to parent owners in the company's latest financial statements, and the amount of working capital in the latest financial statements: Proportion to total assets: 3.37% Proportion to equity: 6.98% Working capital in latest financial statements: TWD 2,178,310 thousand

16. Broker and brokerage fees: None

17. Specific purpose or use of the acquisition or disposal: To enhance decision-making efficiency and financial flexibility of overseas operations

18. Dissenting directors' opinions on this transaction: None

19. Whether this transaction is a related-party transaction: Yes

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

21. Whether the accountant issued a non-reasonableness opinion on this transaction: No

22. Name of accounting firm: Not applicable

23. Name of accountant: Not applicable

24. Accountant's practice certificate number: Not applicable

25. Whether it involves a change in business model: No

26. Explanation of business model change: Not applicable

27. Transaction history 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 for the same event: Not applicable

30. Other explanatory matters: 1. This transaction is an internal group restructuring among subsidiaries directly or indirectly 100% owned by the parent company. The buyer, Lemtech International Limited, had its asset acquisition resolution previously announced by the parent company on May 13, 2026. The seller, Lemtech Precision Materials (China) Co., Ltd., completed its board resolution on June 8, and this announcement is made on its behalf as required by law. This transaction has no impact on the consolidated earnings or shareholders' equity of the parent company. 2. This announcement uses an exchange rate of USD 1 = TWD 31.5 for calculation.