【Royal Vison】Announcement of Securities Acquisition

1. Name of the security: Delta Electronics, Inc. 2. Transaction date: 2026/5/11 ~ 2026/5/14 3. Date of board approval: Not applicable 4. Other approval date: Approval level: Chairman approval, May 14, 2026 5. Transaction quantity, price per unit, and total transaction amount: Quantity: 215,000 shares, Average price per share: NT$2,189.97, Total transaction amount: NT$470,843 thousand 6. Gain (or loss) on disposal (not applicable for securities acquisition): Not applicable 7. Relationship with the target company: None 8. To date, cumulative holding of this security (including this transaction): Quantity: 707,000 shares, Amount: NT$1,559,666 thousand, Holding ratio: 0.027%, Rights restrictions: None 9. To date, the ratio of securities investment (including this transaction) under Article 3 of the 'Regulations Governing the Acquisition and Disposal of Assets by Public Companies' to total assets and equity attributable to owners of the parent company in the most recent financial statements, and the amount of working capital: Ratio to total assets: 0.851%, Ratio to equity attributable to owners of the parent company: 3.152%, Working capital: NT$14,739,777 thousand 10. Specific purpose of the acquisition or disposal: To improve the efficiency of the company's capital utilization 11. Opinions of objecting directors: Not applicable 12. This transaction is a related-party transaction: No 13. Counterparty and its relationship with the company: Not applicable 14. Date of approval by supervisors or audit committee: Not applicable 15. Date of prior material information announcement on the same event: Not applicable 16. Other explanatory matters: None