Chung Hsin Announces Acquisition of Marketable Securities

1. Security Name: Accton Technology Corporation Common Stock

2. Transaction Date: 2026/06/05 ~ 2026/07/08

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 8, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 125 Unit Price (NT$): 2,516.97 Total Transaction Amount (NT$): 314,620,757

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: Holding Balance: 54,000 shares, Amount: NT$141,278,746 Ownership Percentage: 0.01%, Rights Restrictions (e.g., pledge): None

9. Proportion of Marketable Securities Investment (including this transaction) under Paragraph 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' to Total Assets and Equity Attributable to Owners of Parent in the Most Recent Financial Statements, and the Amount of Working Capital: Percentage of Total Assets: 84.60% Percentage of Equity Attributable to Owners of Parent: 121.50% Working Capital Amount: NT$8,285,327 thousand

10. Specific Purpose of Acquisition or Disposal: Investment portfolio

11. Dissenting Director's Opinion on This Transaction: None

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 Explanatory Matters: On June 30, 2026, authorized traders were granted permission to conduct securities transactions on the centralized market during the third quarter of 2026 (Minguo Year 115).