[Chung Hwa] Announcement of Company's Acquisition of Securities

1. Securities Name: MediaTek Common Stock 2. Transaction Date: June 3, 2026 ~ June 8, 2026 3. Board of Directors Approval Date: N/A 4. Other Approval Dates: Approval Level: Chairman Approval June 8, 2026 5. Transaction Quantity, Unit Price, and Total Transaction Amount: Transaction Quantity (thousands of shares): 75 Unit Price (NT$): 4,315.21 Total Transaction Amount (NT$): 323,640,773 6. Disposal Gain (or Loss) (Not applicable for acquisition of securities): N/A 7. Relationship with the Company of the Traded Securities: Balance Held: 125,000 shares, Amount: NT$548,323,573 Shareholding Ratio: 0.008%, Encumbrance Status: None 8. As of the current date, the cumulative quantity, amount, shareholding ratio, and encumbrance status (e.g., pledge status) of the securities traded (including this transaction): Proportion of Total Assets: 79.46% Proportion of Equity Attributable to Owners of the Parent Company: 114.13% Working Capital Amount: NT$8,285,327 thousand 9. As of the current date, the proportion of securities investments (including this transaction) listed in Article 3 of the "Rules Governing the Acquisition or Disposal of Assets by Publicly Issued Companies" to the total assets and the equity attributable to owners of the parent company in the most recent financial statements, and the amount of working capital in the most recent financial statements: Investment Portfolio 10. Specific Purpose of Acquisition or Disposal: Investment Portfolio 11. Opinions of Directors Who Expressed Dissent Regarding This Transaction: None 12. Is This Transaction a Related Party Transaction: No 13. Counterparty to the Transaction and its Relationship with the Company: N/A 14. Date of Supervisor's Approval or Audit Committee's Consent: N/A 15. Date of Previous Announcement of Major Information on the Same Event: N/A 16. Other Explanatory Matters: On March 31, 2026, authorized traders were granted the authority to conduct securities transactions in the centralized trading market during the second quarter of 2026. Keywords: Major Information