Powerchip Semiconductor Manufacturing Announces Issuance Terms for Cash Capital Increase and Global Depositary Receipts

1. Factual Date: June 9, 115 (2026) 2. Company Name: Powerchip Semiconductor Manufacturing Company Limited 3. Relationship with Company:本公司 (This Company) 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: Announcement of pricing completion for the cash capital increase through issuance of ordinary shares to participate in overseas depositary receipt (GDR) offerings. 6. Countermeasures: None 7. Other Matters to be Disclosed:

I. Issuance Terms for the Cash Capital Increase and Participation in Overseas Depositary Receipts: (1) Total Issuance Amount: USD 832,792,207.5 for overseas depositary receipts; employee subscription portion: NT$1,687,787,490 for ordinary shares. (2) Unit Issue Price: USD 31.65 per unit. (3) Total Number of Units Issued: 26,312,550 GDR units issued, representing 394,688,250 ordinary shares; plus 25,311,750 shares subscribed by employees, totaling 420,000,000 ordinary shares issued. (4) Pricing Date: June 9, 115 (2026). (5) Scheduled Issuance Date: June 12, 115 (2026). (6) Shares Represented per GDR Unit: 1 GDR unit represents 15 ordinary shares of the company. (7) Per-Share Price: NT$66.68 (converted at an exchange rate of USD 1:NT$31.6).

II. Issuance and Trading Venue: Luxembourg Stock Exchange.

III. Subscription by Specific Parties: None.

IV. Use of Proceeds and Expected Benefits: (1) Use of Funds: Procurement of machinery and equipment and foreign currency purchase of raw materials. (2) Expected Benefits: Essential investment aligned with product strategy transformation, positively contributing to the company's future operations, competitiveness, and profitability.

V. Major Impact on Shareholders' Equity: This capital increase involves the issuance of 420,000,000 ordinary shares, resulting in an approximate 9.79% dilution of equity, which is not expected to significantly impact shareholders' equity.