[Delta Electronics] Announcement of May 2026 Performance Data

1. Date of Fact Occurrence: 115/06/09 2. Company Name: Delta Electronics, Inc. 3. Relationship with Company (Enter 'Parent Company' or 'Subsidiary'): Parent Company 4. Proportion of Mutual Shareholding: Not applicable 5. Reason for Occurrence: Announcement of the Company's May 2026 performance data 6. Countermeasures: Not applicable 7. Other matters that need to be stated (If the subject of the event or resolution is a publicly issued company or above, this major information also meets the criteria of Article 7, Paragraph 9 of the Regulations Governing the Tender Offer for Securities of Public Companies, which significantly affects shareholder equity or securities prices): Our consolidated revenue for May 2026 was NT$58.962 billion, an increase of 43.7% compared to the consolidated revenue of NT$41.045 billion in the same period last year, and an increase of 0.5% compared to the consolidated revenue of NT$58.692 billion in the previous month. Cumulative consolidated revenue from January to May 2026 was NT$277.006 billion, an increase of 38.0% compared to the cumulative consolidated revenue of NT$200.746 billion in the same period last year. Keywords: Major Information