Hung Chi Announces Full Subscription of Fourth Domestic Unsecured Convertible Corporate Bonds

Release Date: July 4, 2026 Statement Date: July 3, 2026 Statement Time: 15:08:46 Company Code: 3605 Company Name: Hung Chi Subject: Announcement of Full Receipt of Proceeds from the Fourth Domestic Unsecured Convertible Corporate Bonds Applicable Clause: Item 51 Event Date: July 3, 2026

1. Event Date: July 3, 2026 2. Company Name: Hung Chi Electronics Co., Ltd. 3. Relationship with Company (Please enter '本公司' or 'Subsidiary'):本公司 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: In accordance with Article 9, Paragraph 1, Clause 2 of the 'Regulations Governing the Offering and Issuance of Securities by Issuers', the entrusted bank for bond proceeds has fully collected all subscription funds amounting to NT$1,005,000,000 for the Company's fourth domestic unsecured convertible corporate bond issuance as of the announcement date, and the funds have been transferred to the designated escrow account. This is hereby announced. 6. Countermeasures: None 7. Other Matters to be Stated: None