【Walsin】Announcement on Behalf of a Subsidiary Regarding Funds Lending and Endorsement Guarantees in Accordance with Article 22, Paragraph 1, Subparagraph 3 of the Regulations Governing the Lending of Funds to Others and Endorsements/Guarantees by Public Companies

1. Date of occurrence of the event: 2026/05/12 2. Recipient of funds lending: (1) Company name: Dongguan Hanling Electronics Co., Ltd. (2) Relationship with the company lending funds: The company lending funds: Walsin Optronics (Changshu) Co., Ltd. Both are indirect 100% wholly-owned subsidiaries of the Company. (3) Lending limit (in thousands NTD): 169,735 (4) Original lending balance (in thousands NTD): 0 (5) Amount of new lending (in thousands NTD): 27,606 (6) Is this a funds lending authorized by the board of directors for the chairman to make multiple disbursements or revolving credit to the same lending party: Yes (7) Lending balance as of the date of occurrence (in thousands NTD): 27,606 (8) Reason for this new funds lending: Working capital 3. Collateral provided by the company receiving funds lending: (1) Content: None (2) Value (in thousands NTD): 0 4. Latest financial statements of the company receiving funds lending: (1) Capital (in thousands NTD): 170,045 (2) Accumulated profit/loss (in thousands NTD): -211,503 5. Interest calculation method: As per contract agreement 6. Repayment: (1) Conditions: As per contract agreement (2) Date: As per contract agreement 7. Total funds lending balance as of the date of occurrence (in thousands NTD): 62,510 8. Ratio of funds lending balance to the net worth of the public company's latest financial statements as of the date of occurrence: 6.09% 9. Source of company's funds lent to others: Subsidiary itself 10. Other matters to be stated: None