1459 MediaTek

Disclosure Date: 2026-06-25 Statement Date: 2026-06-24 Statement Time: 16:48:10 Company Code: 1459 Company Name: MediaTek Subject: Announcement pursuant to the 'Asset Acquisition or Disposition Rules for Publicly Issued Companies' Applicable Clause: Clause 20 Event Date: 2026-06-24

Details: 1. Security Name: TSMC

2. Transaction Date: 2026/05/22 ~ 2026/06/24

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman Approved on June 24, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Transaction Quantity: 150,000 shares Unit Price: NT$2,309.95 Total Transaction Amount: NT$346,493,049

6. Gain (or Loss) on Disposal (Not applicable for acquisition of securities): Not applicable

7. Relationship with the Target Company: None

8. Cumulative Holdings of the Security (including this transaction) to Date, Amount, Ownership Percentage, and Rights Restrictions (e.g., Pledge Status): Cumulative holdings of the security: 350,000 shares Amount: NT$836,500,000 (including valuation gains/losses), ownership percentage: 0.0013% No rights restrictions

9. Cumulative percentage of securities investments (including this transaction) under Article 3 of the 'Asset Acquisition or Disposition Rules for Publicly Issued Companies' to 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: Securities investments (including valuation gains/losses) account for 30.96% of total assets and 41.81% of equity in the latest financial statements Working capital amount in the latest financial statements: NT$1,158,483,000

10. Specific Purpose of Acquisition or Disposal: Investment and financial management

11. Directors' Dissenting Opinions on This Transaction: None

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

13. Counterparty and Relationship with the Company: Not applicable

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

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

16. Other Disclosures: None