Taiwan Styrene Monomer Corporation Announces Board Approval of 115Q2 Consolidated Financial Report

Disclosure Date: August 13, 2026 Statement Date: August 12, 2026 Statement Time: 14:00:32 Company Code: 1310 Company Name: Taiwan Styrene Monomer Corporation Subject: Announcement of Board Approval of Consolidated Financial Report for the Second Quarter of 2026 Applicable Clause: Item 31 Event Date: August 12, 2026 Details: 1. Date submitted to or resolved by the board of directors: 08/12/2026 2. Date approved by the audit committee: 08/12/2026 3. Reporting period of financial report or self-compiled annual financial information (YYYY/MM/DD ~ YYYY/MM/DD): 01/01/2026 ~ 06/30/2026 4. Cumulative operating revenue from January 1 to current period (in thousand NT$): 4,162,400 5. Cumulative operating gross profit (loss) from January 1 to current period (in thousand NT$): 79,011 6. Cumulative operating income (loss) from January 1 to current period (in thousand NT$): (7,203) 7. Cumulative pre-tax net profit (loss) from January 1 to current period (in thousand NT$): (551,934) 8. Cumulative net profit (loss) for the period from January 1 to current period (in thousand NT$): (599,646) 9. Cumulative net profit (loss) attributable to owners of parent from January 1 to current period (in thousand NT$): (598,688) 10. Cumulative basic earnings (loss) per share from January 1 to current period (in NT$): (1.13) 11. Total assets at end of period (in thousand NT$): 8,028,070 12. Total liabilities at end of period (in thousand NT$): 1,630,911 13. Equity attributable to owners of parent at end of period (in thousand NT$): 6,270,642 14. Other matters to be disclosed: None