HTC Announces Subsidiary Investment in BlackRock Fund

1. Name and nature of the target (if preferred shares, specify issuance terms such as dividend rate): BlackRock Systematic Total Alpha Fund Ltd. – Class A

2. Date of occurrence: June 26, 2026

3. Number of units, unit price, and total transaction amount: Number of units: up to 18,000 shares Unit price: USD 1,000 Total transaction amount: up to USD 18,000,000

4. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party, name disclosure may be omitted): BlackRock Asset Management; unrelated party

5. If the counterparty is a related party, state the reason for selecting them, the previous transferor, the relationship among the previous transferor, the company, and the counterparty, the transfer date, and transfer amount: Not applicable

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

7. 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 the receivables): Not applicable

8. Gain (or loss) from disposal (not applicable for acquisition of securities) (if deferred, provide a table showing recognition): Not applicable

9. Delivery or payment terms (including payment period and amount), contractual restrictions, and other important agreements: As per contract terms

10. Decision-making process for the transaction, reference basis for price determination, and decision-making unit: As per contract terms; executed according to the approval authority specified in the company's 'Procedures for Acquisition or Disposal of Assets'

11. Net asset value per share of the securities-issuing company: 31,575.50

12. Is the private placement reference price of the securities more than 20% different from the per-unit transaction price?: No

13. Cumulative number, amount, ownership percentage, and rights restrictions (e.g., pledge status) of the securities held to date (including this transaction): Cumulative number held: up to 18,000 shares Cumulative amount held: up to USD 18,000,000 Ownership percentage: 0.2% Rights restrictions: None

14. Ratio of cumulative private placement securities investment (including this transaction) to total assets and equity attributable to owners of the parent in the company's latest financial statements, and the amount of working capital in the latest financial statements: Percentage of total assets: 34.52% Percentage of equity attributable to owners of the parent: 48.34% Working capital amount: TWD -7,051,317 thousand

15. Manager and brokerage fees: None

16. Specific purpose or use of the acquisition or disposal of securities: Capital allocation

17. Dissenting directors' opinions on this transaction: None

18. Is this transaction a related-party transaction?: No

19. Board approval date: Not applicable

20. Supervisor approval or audit committee consent date: Not applicable

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

22. Name of accounting firm: Yuan Ho United Certified Public Accountants

23. Name of accountant: Juan Qiong-Hua

24. Accountant license number: Taiwan Finance Certificate Registration (6) No. 2719

25. Other explanatory matters: The above TWD amounts are calculated using an exchange rate of USD 1 = TWD 31.5755. Actual values will be based on the exchange rate on the transaction date.