2371 Tatung Announces Cash Capital Increase in Subsidiary Shangzhi Investment Co., Ltd.

Release Date: July 4, 2026 Statement Date: July 3, 2026 Statement Time: 18:01:54 Company Code: 2371 Company Name: Tatung Subject: Announcement of the Company's Proposed Cash Capital Increase in Its Subsidiary, Shangzhi Investment Co., Ltd. Applicable Clause: Clause 20 Factual Date: July 3, 2026

1. Name and Nature of the Subject Matter (For preferred shares, specify issuance terms such as dividend rate): Name: Shangzhi Investment Co., Ltd. Nature: Common Stock

2. Factual Date: July 3, 2026 ~ July 3, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Investment Review Committee July 3, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Transaction Amount: Number of Units: 25,000,000 shares Unit Price: NT$10 Total Transaction Amount: NT$250,000 thousand

6. Counterparty and Relationship with the Company (If the counterparty is an individual and not a related party, name disclosure may be omitted): Counterparty: Shangzhi Investment Co., Ltd. Relationship: Subsidiary of the Company

7. If the counterparty is a related party, state the reason for selecting them, previous transferor, relationships among the previous transferor, the company, and the counterparty, transfer date, and amount: Long-term investment

8. If the owner of the subject matter has been a related party of the company within the past five years, disclose the acquisition and disposal dates, prices, and relationship with the company at the time: Not applicable

9. Matters related to the disposal of receivables (including types of collateral attached to disposed receivables; if receivables from related parties, disclose names and book amounts): Not applicable

10. Gain (or loss) from disposal (not applicable for acquisition of securities; if deferred, explain recognition): Not applicable

11. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: Cash capital injection; no contractual restrictions or other important agreements

12. Decision-making method for this transaction, reference basis for pricing, and decision-making unit: Approved by the Company's Investment Review Committee

13. Net asset value per share of the securities-issuing company: NT$9.28

14. Cumulative holdings of the securities involved in this transaction (including this transaction) to date, including quantity, amount, ownership percentage, and restricted rights (e.g., pledge status): Holding Quantity: 42,300,000 shares Holding Amount: NT$2,065,971 thousand Ownership Percentage: 100% Restriction Status: None

15. Proportion of securities investments (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Guidelines for Publicly Issued Companies' to the company's 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: Percentage of Total Assets: 75.73% Percentage of Equity Attributable to Owners of the Parent: 167.48% Working Capital in Latest Financial Statements: NT$8,690,161 thousand

16. Broker and Brokerage Fees: Not applicable

17. Specific Purpose or Use of the Acquisition or Disposal: Long-term investment

18. Dissenting Director's Opinion on this Transaction: None

19. Is this transaction a related-party transaction? Yes

20. Date of Supervisor Approval or Audit Committee Consent: Not applicable, based on company's approval authority.

21. Did the accountant issue a non-reasonable opinion? Not applicable

22. Name of Accounting Firm: Not applicable

23. Name of Accountant: Not applicable

24. Accountant's Practice Certificate Number: Not applicable

25. Does this involve a change in business model? No

26. Explanation of Business Model Change: Not applicable

27. Transaction Status with Counterparty in the Past Year and Expected in the Next Year: Not applicable

28. Source of Funds: Not applicable

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

30. Other Explanatory Matters: Conducted in accordance with the company's approval authority and asset acquisition/disposal guidelines.