[Opto-elec] Announcement: Company Received Civil Lawsuit Summons

1. Parties to the Legal Case: Parent company 2. Name of Court or Disciplinary Body: Taiwan Taipei District Court 3. Relevant Document Case Number: Received Civil Lawsuit Summons No. 114年度重訴字第1368號 from the Taiwan Taipei District Court. 4. Date of Fact Occurrence: 2026/04/08 5. Cause of Occurrence (including subject matter of dispute): Plaintiff claims payment of penalty for breach of contract. 6. Handling Process: Appointed lawyers to handle according to statutory procedures. 7. Impact on Company's Financial and Business Operations and Estimated Impact Amount: The case is currently pending court review. The actual impact on the company's finances and operations will depend on subsequent litigation progress and judgment results. Currently, there is no significant impact. 8. Countermeasures and Improvement Status: Appointed lawyers to assist with subsequent legal matters. 9. Other matters to be noted (If the subject of the event or resolution is a publicly offered company or above, this major information also meets the criteria for matters having a significant impact on shareholder equity or security prices as stipulated in Article 7, Paragraph 2 of the Securities Transaction Act): None.