3712 WinPro Investment Holding

Release Date: July 4, 2026 Statement Date: July 3, 2026 Statement Time: 17:49:53 Company Code: 3712 Company Name: WinPro Investment Holding

Subject: Announcement on behalf of subsidiary WeiChiang Technology Corporation pursuant to Article 22, Paragraph 1, Clause 3 of the 'Regulations on Funds Lending, Endorsement, and Guarantee by Publicly Issued Companies'.

Applicable Clause: Clause 23 Date of Event: July 3, 2026

Details:

1. Date of Event: 07/03/2026

2. Recipient of Funds Lending: (1) Company Name: PLEXTOR International Corporation (2) Relationship with Lending Party: Both WeiChiang Technology Corporation and PLEXTOR International Corporation are 100% subsidiaries of WinPro Investment Holding Corporation. (3) Lending Limit (in thousand NT$): 1,015,174 (4) Previous Outstanding Balance (in thousand NT$): 0 (5) Amount of New Lending (in thousand NT$): 200,000 (6) Is this a revolving or multiple disbursement authorized by the Board to the Chairman for the same borrower?: Yes (7) Outstanding Balance as of Event Date (in thousand NT$): 200,000 (8) Reason for New Lending: Group fund allocation planning

3. Collateral Provided by Borrowing Company: (1) Description: None (2) Value (in thousand NT$): 0

4. Latest Financial Statement of Borrowing Company: (1) Capital (in thousand NT$): 4,446,905 (2) Accumulated Deficit (in thousand NT$): -6,969,743

5. Interest Calculation Method: Interest charged based on the rate agreed between WeiChiang and banks

6. Repayment Terms: (1) Conditions: Repayment to be completed within loan period based on borrower’s operational status (2) Date: Repayment to be completed within loan period based on borrower’s operational status

7. Total Outstanding Funds Lending as of Event Date (in thousand NT$): 13,064,336

8. Ratio of Outstanding Lending to Net Equity of Public Company (based on latest financials): 438.04%

9. Source of Lending Funds: Funds from the subsidiary itself

10. Other Disclosures: None