4989 Rongke Announces Cash Capital Increase: Subscription Benchmark Date, Issue Price, and Related Matters

Announcement Date: June 23, 2026 Statement Date: June 22, 2026 Statement Time: 15:13:36 Company Code: 4989 Company Name: Rongke Subject: Announcement of Matters Related to the Cash Capital Increase, Including Subscription Benchmark Date, Issue Price, and Payment Institutions (Supplemental Announcement) Applicable Clause: Item 11 Factual Date: June 22, 2026

1. Board Resolution or Company Decision on Capital Increase Benchmark Date: May 12, 2026 2. Whether a blanket filing for new share issuance is adopted (if yes, specify the planned issuance period; if no): No 3. Regulatory Authority Approval Effective Date: April 22, 2025, Financial Supervisory Commission Securities Department No. 1140369069 4. Board Resolution (Supplemental) Issuance Date: December 15, 2024 5. Total Issuance Amount and Number of Shares: 35,000,000 ordinary shares with a par value of NT$10 per share. The total actual amount raised will be determined based on the actual issue price. 6. Issuance Amount and Number of Shares for Blanket Filing Cases: Not applicable 7. Remaining Amount and Share Balance after This Issuance for Blanket Filing Cases: Not applicable 8. Par Value per Share: NT$10 9. Issue Price: NT$60 per share 10. Number of Shares for Employee Subscription: 3,500,000 shares 11. Existing Shareholders' Subscription Ratio: 80% of the total new shares issued (28,000,000 shares) will be allocated to existing shareholders based on their shareholding ratio as recorded in the shareholder register on the subscription benchmark date. Tentatively, 203.22769122 shares per 1,000 shares held. 12. Public Offering Method and Number of Shares: 10% (3,500,000 shares) will be offered through public subscription. 13. Handling of Fractional Shares and Unsubscribed Shares: Shareholders with fractional shares less than one full share may consolidate them within five days from the last transfer date at the share agency. Unconsolidated or abandoned shares will be authorized to be subscribed by specific persons designated by the Chairman. 14. Rights and Obligations of the Newly Issued Shares: The newly issued shares carry the same rights and obligations as the existing ordinary shares. 15. Use of Proceeds from the Capital Increase: To strengthen working capital and repay bank loans. 16. Subscription Benchmark Date for Cash Capital Increase: July 5, 2026 17. Last Transfer Date: June 30, 2026 18. Start Date of Transfer Suspension: July 1, 2026 19. End Date of Transfer Suspension: July 5, 2026 20. Share Payment Period: Payment period for existing shareholders and employees: July 8, 2026 – July 16, 2026; Payment period for specific persons: July 17, 2026 – July 28, 2026. 21. Contract Signing Date with Deposit Collection and Escrow Banks: June 22, 2026 22. Authorized Deposit Collection Institution: CTBC Bank, Business Division Branch 23. Authorized Escrow Institution: Hua Nan Commercial Bank, Zhonglun Branch 24. Other Matters to be Disclosed: (1) All newly issued shares under this cash capital increase will be issued in dematerialized form. (2) The issuance benchmark date for this cash capital increase is set as July 29, 2026. (3) If amendments to this capital increase are required due to legal regulations, regulatory requirements, or objective circumstances, the Chairman is authorized to handle all related matters with full discretion.