8163 Delta: Correction of Derivatives Trading Information for Subsidiary Taiyu Technology

Disclosure Date: July 9, 2026 Statement Date: July 8, 2026 Statement Time: 16:09 Company Code: 8163 Company Name: Delta Electronics Subject: Correction of Derivatives Trading Information for Subsidiary Taiyu Technology Co., Ltd. Compliance Clause: Item 51 Event Date: July 8, 2026

Details: 1. Event Date: 07/08/2026 2. Company Name: Taiyu Technology Co., Ltd. 3. Relationship with Company: Subsidiary 4. Cross-shareholding Ratio: Not applicable 5. Reason for Event: Correction of May 2026 derivatives trading disclosure for subsidiary 6. Item/Report Name Being Corrected: Derivatives Trading Information for May 2026 7. Information Before Correction: Non-trading held / Not qualifying for hedge accounting / Closed contracts / Forward contracts Total contract amount: NT$327,199 thousand Year-to-date recognized realized gains/losses: NT$-5,529 thousand 8. Information After Correction: Non-trading held / Not qualifying for hedge accounting / Closed contracts / Forward contracts Total contract amount: NT$371,977 thousand Year-to-date recognized realized gains/losses: NT$-5,597 thousand 9. Response Measures: Re-uploaded to the Public Information Observation Station 10. Other Matters to be Stated: None