3712 Formosa Advanced Technologies Co., Ltd.: Correction of Related Party Transaction Declaration Information

Report Date: May 16, 2026 Announcement Date: May 15, 2026 Announcement Time: 17:35:34 Company Code: 3712 Company Name: Formosa Advanced Technologies Co., Ltd. Subject: Correction of the company's related party transaction declaration information for March 2026 (115th year of the Republic of China calendar). Compliance Clause: Article 51 Occurrence Date: May 15, 2026 Explanation: 1. Date of occurrence: May 15, 2026 2. Company name: Formosa Advanced Technologies Co., Ltd. 3. Relationship with the company (please enter 'the company' or 'subsidiary'): The company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: Correction of the company's related party transaction declaration information for March 2026. 6. Corrected information item/report name: Details of related party transaction declaration. 7. Amount/content/page before correction: [Receivables] (1) Name of related party: Studio A Technology Limited Receivables for this month (in thousands of NTD): 864 Accumulated receivables for the year (in thousands of NTD): 2,312 Percentage of accumulated receivables in consolidated financial statements for the year: 0.11% (2) Name of related party: Chang Pin Receivables for this month (in thousands of NTD): 56,410 Accumulated receivables for the year (in thousands of NTD): 142,754 Percentage of accumulated receivables in consolidated financial statements for the year: 7.09% [Acquisition of Assets] Name of related party: Central Motion Picture Corporation Amount of assets acquired this month: 6,139 Accumulated amount of assets acquired for the year: 10,428 8. Amount/content/page after correction: [Receivables] (1) Name of related party: Studio A Technology Limited Receivables for this month (in thousands of NTD): 910 Accumulated receivables for the year (in thousands of NTD): 2,358 Percentage of accumulated receivables in consolidated financial statements for the year: 0.12% (2) Name of related party: Chang Pin Wind Power Co., Ltd. Receivables for this month (in thousands of NTD): 34,675 Accumulated receivables for the year (in thousands of NTD): 121,019 Percentage of accumulated receivables in consolidated financial statements for the year: 6.01% [Acquisition of Assets] Name of related party: Central Motion Picture Corporation Amount of assets acquired this month: 0 Accumulated amount of assets acquired for the year: 4,289 9. Countermeasures: A material information announcement will be issued on the Market Observation Post System, and relevant declaration items will be corrected. 10. Other matters that should be specified: None