9958 Century Steel Announces Adjustment of Conversion Price for 8th Domestic Unsecured Convertible Bond

Release Date: July 9, 2026 Statement Date: July 8, 2026 Statement Time: 16:39:48 Company Code: 9958 Company Name: Century Steel Subject: Announcement of Conversion Price Adjustment for the 8th Domestic Unsecured Convertible Bond Applicable Clause: Item 51 Factual Date: July 8, 2026

Details: 1. Factual Date: 07/08/2026 2. Company Name: Century Steel Structure Co., Ltd. 3. Relationship with Company (Please enter '本公司' or 'Subsidiary'):本公司 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: Due to cash dividend distribution, the conversion price of the 8th domestic unsecured convertible bond has been adjusted. 6. Response Measures: According to Article 11 of the Issuance and Conversion Regulations for the 8th Domestic Unsecured Convertible Bond, the conversion price shall be adjusted. Therefore, effective from the ex-dividend reference date of July 31, 2026, the price will be adjusted from NT$232.7 to NT$223.8. 7. Other Matters to be Disclosed (If the subject of the event or resolution is a publicly issued company or above, this significant information also complies with Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act, regarding matters significantly affecting shareholder rights or securities prices): None