Yongguan-KY Announces Actual and Projected Cash Flow for Last Month and Next Three Months, Long-Term and Short-Term Debt Balances, and Bank Financing Utilization as of End of Last Month

1. Factual Date: 07/01/2026 (R.O.C. Year 115) 2. Company Name: Yongguan Energy Technology Group Co., Ltd. 3. Relationship with Company (Please specify '本公司' or 'Subsidiary'):本公司 (Our Company) 4. Cross-shareholding Ratio: Not applicable 5. Reason for Announcement: In accordance with the requirements of the Taiwan Stock Exchange (TWSE), the company hereby announces the actual and projected cash inflows and outflows for the previous month and the next three months, as well as the outstanding balances of short-term and long-term debt and the utilization status of bank financing facilities as of the end of the previous month (Unit: NT$ thousand). (1) Actual and Projected Cash Flow for the Previous Month and Next Three Months Item June 2026 July 2026 August 2026 September 2026 (Actual) (Projected) (Projected) (Projected) ---------- ---------- ---------- ---------- ---------- Opening Cash 1,146,350 1,138,115 702,743 585,977 Cash Inflow 778,272 601,096 674,657 915,689 Cash Outflow 786,507 1,036,468 791,423 936,784 Closing Cash 1,138,115 702,743 585,977 564,882

(2) Outstanding Short- and Long-Term Debt and Bank Financing Facility Utilization as of End of Previous Month Item Facility Drawn Amount Available Balance ----------- ----------- ----------- ---------- Short-Term Loan 5,568,876 5,568,876 0 Medium-Long Term Loan 7,540,494 7,540,494 0

6. Response Measures: None. 7. Other Matters to be Clarified (This announcement qualifies as material information under Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act, as it may significantly affect shareholders' equity or securities prices): The above figures are estimates based on the company's current situation and may differ from actual results.