Huang Hsiang Announces Disposal of Securities

1. Security Name: MediaTek Inc.

2. Transaction Date: 2026/6/9 ~ 2026/6/15

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman June 15, 2026

5. Transaction Quantity, Unit Price, and Total Amount: Quantity: 190,000 shares Average Price per Share: NT$4,418.42 Total Transaction Amount: NT$839,500,000

6. Gain (or Loss) from Disposal (not applicable for acquisition of securities): Gain from disposal: NT$23,048,000

7. Relationship with the Target Company: None

8. Cumulative Holdings of the Securities (including this transaction) to Date in Terms of Quantity, Value, Ownership Percentage, and Restricted Rights (e.g., Pledge Status): Quantity: 45,000 shares Value: NT$200,440,000 Ownership Percentage: 0.002%

9. Cumulative Securities Investments under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' (including this transaction) as a Percentage of Total Assets and Equity Attributable to Owners of Parent in the Company's Latest Financial Statements, and the Amount of Working Capital in the Latest Financial Statements: Percentage of Total Assets: 1.517% Percentage of Equity: 5.621% Working Capital: NT$14,739,777,000

10. Specific Purpose of Acquisition or Disposal: To improve the company's capital utilization efficiency

11. Dissenting Director's Opinion on This Transaction: Not applicable

12. Whether This Transaction is a Related-Party Transaction: No

13. Counterparty and Its Relationship with the Company: Not applicable

14. Date of Supervisor Approval or Audit Committee Consent: Not applicable

15. Previous Date of Material Information Disclosure on the Same Event: Not applicable

16. Other Disclosures: None