1589 Yongguan-KY

Release Date: August 11, 2026 Statement Date: August 10, 2026 Statement Time: 16:42:03 Company Code: 1589 Company Name: Yongguan-KY Purpose: Announcement regarding the non-repayment of the company's domestic fourth unsecured convertible corporate bond (Yongguan IV KY, code: 15894) which matured on February 23, 2026, along with the current month's cash budget and prior month's budget execution report. Applicable Clause: Clause 1 Event Date: February 23, 2026 Details: 1. Company Name (or Responsible Person): Yongguan Energy Technology Group Co., Ltd. 2. Relationship to Company: Self 3. Cross-shareholding Ratio: Not applicable 4. Date of Credit Loss: 02/23/2026 5. Amount of Credit Loss: NT$1,035,605,020 6. Description of Credit Loss Event: The fourth unsecured convertible corporate bond issued by the company within the Republic of China (abbreviated as: Yongguan IV KY, code: 15894) reached its third anniversary on February 20, 2026. Due to bondholders exercising their put option, the company failed to make timely repayment of NT$1,035,605,020. 7. Response and Safeguard Measures: The company will announce a repayment plan through the bond trustee bank and proceed with subsequent procedures according to relevant regulations. 8. Other Matters to be Disclosed (If the entity involved in the event or resolution is a publicly listed company or above, this material information also qualifies under Article 7, Paragraph 1 of the Enforcement Rules of the Securities Trading Act as a matter having significant impact on shareholders' rights or securities prices):

Cash Budget Execution Report for July 2026 (Unit: NT$ thousand)

Item July 2026 Budget July 2026 Actual August 2026 Budget ------------------- ----------------- --------------------- ------------------ Opening Balance 1,138,115 1,138,115 1,095,143 Cash Inflow 601,096 745,319 665,455 Cash Outflow 1,036,468 788,291 767,883 Closing Balance 702,743 1,095,143 992,715