[Powerchip] Joint Venture with Broadcom to Establish Panel-Level Advanced Packaging Manufacturing Company in Singapore

1. Name and nature of the subject matter (if preferred shares, specify issuance conditions such as dividend rate): Shares of XCIP TECHNOLOGIES PTE. LTD. joint venture

2. Event date: July 16, 2026 ~ September 15, 2026

3. Board approval date: July 16, 2026

4. Other approval dates: Not applicable

5. Transaction quantity, unit price, and total transaction amount: Estimated number of units: Undetermined Unit price: Undetermined Estimated total transaction amount: Total investment of USD 5.66 billion, with the company investing USD 400 million

6. Counterparty and its relationship with the company (if individual and not a related party, name may be omitted): BROADCOM TECHNOLOGIES INC.; Relationship with company: None

7. If counterparty is a related party, state reason for selection, previous transferee, relationships among parties, transfer date, and amount: Not applicable

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

9. Matters related to 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; deferred gains shall be explained in table form): Not applicable

11. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: As per contract terms, capital contributions may be made in installments

12. Decision-making method for this transaction, reference basis for pricing, and decision-making unit: Approved by board resolution

13. Net asset value per share of the securities-issuing company acquired or disposed: Not applicable

14. Cumulative holdings (including this transaction) of the securities involved, amount, ownership percentage, and restricted rights (e.g., pledge status) to date: Number of securities held: Undetermined Total investment amount: USD 400 million Ownership percentage: 30% Restricted rights status: Not applicable

15. Proportion of securities investments listed under Article 3 of the 'Asset Acquisition and Disposition Rules for Publicly Issued Companies' (including this transaction) relative to total assets and equity attributable to owners of parent in the company’s most recent financial statements, and operating capital amount in the most recent financial statements: Percentage of total assets in most recent financial statements: 11.57% Percentage of shareholders’ equity in most recent financial statements: 25.17% Operating capital amount in most recent financial statements: NT$22,770,844 thousand

16. Broker and brokerage fees: Not applicable

17. Specific purpose or use of acquiring or disposing of securities: For overall international business layout and proximity to global customer supply chains

18. Dissenting director opinions regarding this transaction: Not applicable

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

20. Date of supervisor approval or audit committee consent: Not applicable

21. Whether accountants issued an unreasonable opinion on this transaction: No

22. Name of accounting firm: Chien Chin Certified Public Accountants

23. Name of accountant: Tseng, Tsai-Hsuan, CPA

24. Accountant license number: Financial Supervisory Commission Certificate No. 6011

25. Whether involves change in business model: No

26. Explanation of business model change: Not applicable

27. Transaction history with counterparty over the past year and expected transactions in the next year: Not applicable

28. Source of funds: Internal funds

29. Previous material information disclosure date for the same event: August 7, 2026

30. Other explanatory matters: 1. Supplemental announcement of accountant's fairness opinion on pricing. 2. This transaction is not a related-party transaction; Item 19 corrected to 'No'.