3501 Wei Hsi Co., Ltd.

Announcement Date: July 17, 2026 Statement Date: July 16, 2026 Statement Time: 18:16:30 Company Code: 3501 Company Name: Wei Hsi Co., Ltd. Subject: Announcement of the 2026 Dividend Record Date Applicable Clause: Clause 14 Event Date: July 16, 2026 Details: 1. Date of Board, Shareholders' Meeting Resolution or Company Decision: July 16, 2026 2. Type of Rights/Dividend Adjustment (enter 'Ex-Rights', 'Ex-Dividend', or 'Ex-Rights and Ex-Dividend'): Ex-Dividend 3. Ordinary Share Dividend Type and Amount: Cash dividend of TWD 236,515,854; TWD 2 per share 4. Ex-Rights (Ex-Dividend) Trading Day: August 3, 2026 5. Last Transfer Date: August 4, 2026 6. Transfer Suspension Start Date: August 5, 2026 7. Transfer Suspension End Date: August 9, 2026 8. Ex-Rights (Ex-Dividend) Record Date: August 9, 2026 9. Final Date for Bond Conversion Application: Not applicable 10. Bond Conversion Suspension Start Date: Not applicable 11. Bond Conversion Suspension End Date: Not applicable 12. Ordinary Share Cash Dividend Payment Date: August 26, 2026 13. Whether Part or All of the Cash Dividend is Paid in Foreign Currency (enter 'Yes' or 'No'): No 14. Currency for Foreign Cash Dividend: Not applicable 15. Recipients of Foreign Cash Dividend: Not applicable 16. Exchange Rate Determination Method for Foreign Cash Dividend: Not applicable 17. Other Matters to be Disclosed: None