China Steel Chemical Corporation's Board of Directors Approved Q1 2026 Consolidated Financial Report

1. Date of submission to the board of directors or resolution by the board of directors: May 7, 2026 (115/05/07 according to ROC calendar) 2. Date of approval by the audit committee: May 7, 2026 (115/05/07 according to ROC calendar) 3. Reporting period of financial report or annual self-reported financial information Beginning and end dates (XXX/XX/XX~XXX/XX/XX): January 1, 2026 ~ March 31, 2026 (115/01/01~115/03/31 according to ROC calendar) 4. Accumulated operating revenue from January 1 to the end of this period (NT$ thousands): 3,286,610 5. Accumulated operating gross profit (gross loss) from January 1 to the end of this period (NT$ thousands): 493,447 6. Accumulated operating profit (loss) from January 1 to the end of this period (NT$ thousands): 348,246 7. Accumulated net profit (net loss) before tax from January 1 to the end of this period (NT$ thousands): 348,829 8. Accumulated net profit (net loss) for this period from January 1 to the end of this period (NT$ thousands): 278,807 9. Accumulated net profit (loss) attributable to owners of the parent company from January 1 to the end of this period (NT$ thousands): 272,804 10. Basic earnings per share (loss) at the end of the period (NT$): 1.10 11. Total assets at the end of the period (NT$ thousands): 11,542,815 12. Total liabilities at the end of the period (NT$ thousands): 4,393,721 13. Equity attributable to owners of the parent company at the end of the period (NT$ thousands): 6,906,784 14. Other matters that need to be specified: None