[Huang Hsiang] Announcement on Acquisition of Securities

1. Name of Securities: Delta Electronics, Inc. 2. Transaction Dates: June 4, 2026 – June 5, 2026 3. Board Approval Date: Not applicable 4. Other Approval Date: Authorized by Chairman June 5, 2026 5. Quantity, Unit Price, and Total Amount: Quantity: 242,000 shares Average Price per share: NT$2,347.53 Total Transaction Amount: NT$568,102,000 6. Profit (or loss) from disposal: Not applicable 7. Relationship with target company: None 8. Cumulative holdings (including this transaction): Quantity: 387,000 shares Amount: NT$887,977,000 Shareholding Percentage: 0.015% 9. Financial status metrics (relative to most recent financial statement): Percentage of total assets: 1.027% Percentage of equity attributable to owners of the parent: 3.804% Working capital: NT$14,739,777,000 10. Specific purpose of acquisition: To improve capital utilization efficiency 11. Dissenting opinions: Not applicable 12. Related party transaction: No 13. Relationship with counterparty: Not applicable 14. Supervisor/Audit Committee approval date: Not applicable 15. Previous announcement date: Not applicable 16. Other notes: None