Kuantian Steel Announces Unaudited Consolidated Financial Results for May 2026

1. Factual Date: June 29, 2026 2. Company Name: Kuantian Steel Corporation 3. Relationship with Company (Please enter '本公司' or 'Subsidiary'):本公司 (Parent Company) 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: Announcement of unaudited consolidated financial results for May 2026 6. Response Measures: None 7. Other Matters to be Clarified (If the subject of the event or resolution is a publicly issued company or above, this significant information also meets the criteria under Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act regarding matters significantly affecting shareholder rights or securities prices): (1) Accounting Items (Unit: Thousand New Taiwan Dollars) May 2026 Jan-May 2026 -------------------------------------------------- -------- ---------- Consolidated Net Operating Revenue 235,624 1,159,236 Consolidated Operating Income/Loss -37,261 -124,572 Consolidated Pre-tax Income/Loss -27,164 -107,891 Net Income/Loss Attributable to Parent Company Owners -19,982 -79,434 Earnings Per Share Attributable to Parent Company Owners (NT$) -0.05 -0.19

(2) The self-calculated figures have not yet been audited or reviewed by certified public accountants. Actual figures will be based on the financial reports officially announced by the company after auditor review. This is hereby clarified.