UMC Announces Relevant Information on Disposal of Novatek Microelectronics Corp. Securities

1. Name and nature of the subject matter (for preferred shares, specify issuance conditions such as dividend rate): Ordinary shares of Novatek Microelectronics Corp.

2. Date of occurrence: 6/5/115 ~ 6/16/115

3. Board approval date: Not applicable

4. Other approval dates: Approval level: Not applicable June 16, 115

5. Transaction quantity, unit price, and total transaction amount: Number of units: 1,174,694 shares Unit price: NT$479.8 Total amount: NT$563,618,180

6. Counterparty and its relationship with the company (if the counterparty is a natural person and not a related party of the company, name disclosure may be omitted): Exchangeable bond holders applied for conversion.

7. If the counterparty is a related party, state the reason for selecting the related party as the transaction party, the previous transferee, the relationship among the previous transferee, the company, and the counterparty, the previous transfer date, and the transfer amount: Not applicable

8. If the owner of the subject matter was a related party of the company within the past five years, disclose the related party's acquisition and disposal dates, price, and relationship with the company at the time of transaction: Not applicable

9. Matters related to the disposal of claims (including types of collateral attached to the disposed claims; if the disposed claim is to a related party, disclose the name of the related party and the book value of the claim): Not applicable

10. Gain (or loss) from disposal (not applicable for acquisition of securities) (if previously deferred, list recognition status): Impact on retained earnings: NT$386,963,843. (No impact on profit and loss)

11. Delivery or payment terms (including payment period and amount), contractual restrictions, and other important agreements: Exchangeable bond holders converted into Novatek ordinary shares. Contractual restrictions: None. Other important agreements: None.

12. Transaction decision method, reference basis for price determination, and decision-making unit: Transaction decision method: In accordance with the prospectus. Price determination reference: Conversion based on exchange price.

13. Net asset value per share of the securities-issuing company: NT$118.20

14. Cumulative number, amount, ownership percentage, and rights restriction status (e.g., pledge) of the securities held (including this transaction) to date: Quantity: 15,269,893 shares Amount: NT$7,280,449,819 Ownership percentage: 2.51% Rights restriction status: None

15. Ratio of securities investments listed under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' (including this transaction) to total assets and equity attributable to owners of the parent in the company's latest financial statements, and the amount of working capital in the latest financial statements (Note 2): Total asset ratio: 42.27% Equity ratio: 57.85% Latest financial report working capital: NT$44,980,640 thousand

16. Broker and brokerage fees: Broker: None Brokerage fees: None

17. Specific purpose or use of acquisition or disposal of securities: Conversion of exchangeable bonds.

18. Dissenting directors' opinions on this transaction: Not applicable

19. Whether this transaction is a related-party transaction: No

20. Date of auditor's approval or audit committee's consent: Not applicable

21. Whether the accountant issued an adverse opinion on this transaction: Not applicable

22. Name of accounting firm: Not applicable

23. Name of accountant: Not applicable

24. Accountant's practice certificate number: Not applicable

25. Whether it involves a change in business model: No

26. Explanation of business model change: Not applicable

27. Transaction status with the counterparty in the past year and expected in the next year: Not applicable

28. Source of funds: Not applicable

29. Previous date of material information release on the same event: Not applicable

30. Other explanatory matters: None