1605 Walsin: Subsidiary Funds Two Affiliated Companies for Operational Needs

Release Date: August 8, 2026 Statement Date: August 7, 2026 Statement Time: 14:44:04 Company Code: 1605 Company Name: Walsin Subject: Announcement by the Company on Behalf of Its Subsidiary, Walsin Singapore Pte. Ltd., Regarding Compliance with Article 22, Paragraph 1, Clause 3 of the Handling Guidelines for Lending Funds to Others—Total of 2 Cases.

Applicable Clause: Clause 23 Factual Date: August 7, 2026

Details:

1. Factual Date: 08/07/2026

2. Recipients of Fund Lending:

(1) Company Name: PT. Sunny Metal Industry (2) Relationship with Lending Party: PT. Sunny Metal Industry is a company in which Walsin Singapore Pte. Ltd. holds a consolidated stake of 79.61%. (3) Lending Limit (in thousand NTD): 13,987,930 (4) Previous Outstanding Balance (in thousand NTD): 7,003,193 (5) Amount of New Lending This Time (in thousand NTD): 4,684,950 (6) Is this a revolving or installment loan authorized by the board to the chairman for the same borrower?: No (7) Outstanding Balance as of Factual Date (in thousand NTD): 11,688,143 (8) Reason for New Lending: Operational Needs

(1) Company Name: Walsin Lihwa Europe S.à r.l. (2) Relationship with Lending Party: Walsin Lihwa Europe S.à r.l. is a company 100% owned by the parent company of Walsin Singapore Pte. Ltd. (3) Lending Limit (in thousand NTD): 81,757,707 (4) Previous Outstanding Balance (in thousand NTD): 0 (5) Amount of New Lending This Time (in thousand NTD): 4,527,923 (6) Is this a revolving or installment loan authorized by the board to the chairman for the same borrower?: Yes (7) Outstanding Balance as of Factual Date (in thousand NTD): 4,527,923 (8) Reason for New Lending: Operational Needs

3. Collateral Provided by Recipient Companies:

(1) Description: None (2) Value (in thousand NTD): 0

4. Latest Financial Statements of Recipient Companies:

(1) Capital (in thousand NTD): 22,659,130 (2) Accumulated Profit/Loss (in thousand NTD): 463,740

5. Interest Calculation Method: As per contract terms

6. Repayment:

(1) Conditions: As per contract terms (2) Date: As per contract terms

7. Total Outstanding Lending Balance as of Factual Date (in thousand NTD): 103,460,785

8. Ratio of Lending Balance to the Net Worth of the Publicly Listed Company Based on Latest Financial Statements: 50.62%

9. Source of Funds Lent: The subsidiary’s own funds

10. Other Matters to be Disclosed:

1. Capital of Recipient Companies Based on Latest Financial Statements (in thousand NTD): (1) PT. Sunny Metal Industry: 3,231,000 (2) Walsin Lihwa Europe S.à r.l.: 19,428,130

2. Accumulated Profit/Loss of Recipient Companies Based on Latest Financial Statements (in thousand NTD): (1) PT. Sunny Metal Industry: 1,047,846 (2) Walsin Lihwa Europe S.à r.l.: (584,106)

3. Exchange Rates: USD/NTD = 32.31, EUR/NTD = 37.19 (as of July 31, 2026)