[Huang Hsiang] Announcement of acquisition of marketable securities

1. Name of the security: Delta Electronics, Inc. 2. Trading date: 2026/04/20 to 2026/04/22 3. Date of board of directors' approval: Not applicable 4. Other approval dates: Approved by the Chairman on April 22, 2026 5. Transaction volume, unit price, and total transaction amount: Volume: 216,000 shares Average price per share: NT$1,980.68 Total transaction amount: NT$427,827,000 7. Relationship with the underlying company: None 8. Accumulated holding volume, amount, and percentage: Volume: 275,000 shares Amount: NT$527,610,000 Holding percentage: 0.011% 9. Ratio of securities investment to total assets: 0.773%. Ratio to parent company owners' equity: 2.864%. Working capital: NT$14,739,777,000. 10. Specific purpose of acquisition: To improve the company's fund utilization efficiency. 12. Is this a related party transaction: No