2393 Everlight Files Patent Infringement Lawsuit Against Nichia Corporation and Nichia America Corporation

Date of Announcement: August 5, 2026 Date of Statement: August 4, 2026 Time of Statement: 17:03:33 Company Code: 2393 Company Name: Everlight Subject: Everlight Files Patent Infringement Lawsuit Against Nichia Corporation and Nichia America Corporation (Supplementary Document Case Number) Applicable Clause: Clause 2 Date of Event: August 4, 2026 Explanation: 1. Parties to the Legal Action: Plaintiff – Everlight Electronics Co., Ltd. Defendants – Nichia Corporation and Nichia America Corporation

2. Court or Administrative Authority Handling the Case: United States District Court for the Eastern District of Michigan, Southern Division

3. Case Number of Related Legal Documents: 2:26-cv-12640-SJM-KGA

4. Date of Event: 8/4/2026

5. Background of the Incident (Including Subject of Litigation): Everlight has discovered that flash LED products manufactured and sold by Nichia Corporation and Nichia America Corporation (collectively referred to as the "Defendants") may infringe U.S. Patent No. 7,554,126 owned by the Company. To protect the legitimate rights and interests of the Company and all shareholders, Everlight formally filed a patent infringement lawsuit on July 31, 2026 (U.S. time, July 30, 2026) with the United States District Court for the Eastern District of Michigan, Southern Division, asserting that the Defendants’ flash LED products infringe the Company’s patent rights and requesting the court to order the Defendants to bear liability for damages in accordance with the law.

Based on the Company’s preliminary assessment, this case has not yet had a significant impact on the Company’s financial condition or overall operations. Future impacts will depend on the progress of the litigation and the court’s final ruling.

The Company has always valued the protection of intellectual property rights and continues to invest in research and development to maintain its competitive advantage. Going forward, the Company will take necessary legal measures to protect its rights, disclose relevant information in accordance with applicable laws and regulations, and safeguard investor interests.

6. Processing Progress: The Company has filed a lawsuit against the Defendants for patent infringement and requested the court to order compensation for damages. The Company has confirmed the court case number and is therefore issuing this supplementary announcement.

7. Impact on Company’s Financials and Business Operations and Estimated Amount of Impact: None.

8. Countermeasures and Improvement Status: None.

9. Other Matters to be Disclosed (If the entity involved in the event or resolution is a publicly listed company or above, this material information also qualifies as a matter under Article 7, Paragraph 2 of the Enforcement Rules of the Securities and Exchange Act that significantly affects shareholder rights or securities prices): None.