Tenghui Electronics-KY Announces Convertible Bond Tenghui Electronics 2KY (Code: 66722) Has Reached Trading Alert Threshold

1. Date of Event: July 7, 2026 2. Reason for Disclosure: In accordance with notification from the GreTai Securities Market 3. Convertible Bond Information: - Maturity Date: February 3, 2031 - Total Issuance Amount: 500,000,000 TWD - Outstanding Issuance Balance for the Month: 18,200,000 TWD (unconverted amount as of July 6, 2026) - Latest Conversion Price: 90.50 TWD - Closing Price of Underlying Stock (6672): 300.00 TWD (closing price on July 7, 2026) - Closing Price of Convertible Bond (66722): 330.00 TWD (reference opening price on July 7, 2026) 4. Other Disclosures: There are no material events under Article 4 of the 'Procedures for Verification and Public Disclosure of Material Information by Listed Companies on the GreTai Securities Market.'