Daito Denki Announces Full Subscription of First Domestic Unsecured Convertible Corporate Bonds

Release Date: July 15, 2026 Statement Date: July 14, 2026 Statement Time: 16:45:05 Company Code: 1623 Company Name: Daito Denki Subject: Announcement of Full Receipt of Proceeds from the First Domestic Unsecured Convertible Corporate Bonds Applicable Clause: Item 51 Factual Date: July 14, 2026

Details: 1. Factual Date: July 14, 2026 2. Company Name: Daito Denki Industry Co., Ltd. 3. Relationship with Company (Please enter '本公司' or 'Subsidiary'):本公司 (Our Company) 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 designated collection bank has fully received the total subscription amount of NT$2,010,000,000 for the first domestic unsecured convertible corporate bonds issued by the Company and transferred the funds to the designated escrow account. This is hereby officially announced. 6. Countermeasures: None 7. Other Matters to be Disclosed: As the entity involved is a publicly issued company or above, this significant information also qualifies as a matter under Article 7, Clause 9 of the Enforcement Rules of the Securities and Exchange Act, which significantly affects shareholders' rights or securities prices. No additional matters to disclose.