1909 Rongcheng

Release Date: July 7, 2026 Statement Date: July 6, 2026 Statement Time: 8:30 AM Company Code: 1909 Company Name: Rongcheng Subject: Announcement of unaudited consolidated financial results for June 2026 and cumulative results from January to June Applicable Clause: Clause 51 Event Date: July 6, 2026

Details: 1. Event Date: July 6, 2026 2. Company Name: Rongcheng Paper Co., Ltd. 3. Relationship to Company: Parent Company 4. Cross-shareholding Ratio: Not applicable 5. Media Name: Not applicable 6. Report Content: Not applicable 7. Reason for Announcement: To disclose unaudited consolidated financial results for June 2026 and cumulative results from January to June

Unit: NT$ Thousand; EPS: NT$ per share (unaudited)

June Jan-Jun -------------------------------------------------------------------- Consolidated Operating Income: 93,433 225,995 Consolidated Pre-tax Income: 129,433 343,247 Consolidated Pre-tax Net Income Attributable to Owners of Parent: 123,304 298,671 Consolidated Pre-tax EPS: 0.10 0.23

8. Response Measures: None 9. Other Disclosures: The pre-tax EPS is calculated based on a weighted average of 1.3 billion outstanding shares.