【Ruentex Development】Correction to the Endorsement and Guarantee Information Disclosure Statement for March 2026

1. Date of occurrence of the event: 2026/04/29 2. Company name: Ruentex Development Co., Ltd. 3. Relationship with the company (please enter "this company" or "subsidiary"): This company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: Correction to the Endorsement and Guarantee Information Disclosure Statement for March 2026 6. Corrected information item/report name: Endorsement and Guarantee Information Disclosure Statement for March 2026 7. Amount/content/page before correction: Maximum outstanding balance of endorsement and guarantee by subsidiary Ruentex Precision for Ruentex Materials accumulated up to this month: NT$88,368 thousand End-of-period endorsement and guarantee balance: NT$88,368 thousand Actual utilized amount: NT$88,368 thousand Ratio of cumulative endorsement and guarantee amount to net worth in the most recent financial report: 0.97% 8. Amount/content/page after correction: Addition of Maximum outstanding balance of endorsement and guarantee by subsidiary Ruentex Construction for Ruentex Precision accumulated up to this month: NT$16,900 thousand End-of-period endorsement and guarantee balance: NT$16,900 thousand Actual utilized amount: NT$16,900 thousand Ratio of cumulative endorsement and guarantee amount to net worth in the most recent financial report: 3.33% 9. Countermeasures: Re-upload to the Market Observation Post System 10. Other matters that need to be specified: None