【Wistron】Subsidiary Wiwynn International Corporation (WYUS) Adds New Endorsement Guarantee Amount Reaching Article 25, Paragraph 1, Subparagraph 4 of the Processing Guidelines for Public Announcement

1. Date of occurrence of event: 2026/04/24 2. Endorsed and guaranteed entity: (1) Company name: Wiwynn Technology Corporation (WYMUS) (2) Relationship with the endorsing/guaranteeing company: Both are 100% owned subsidiaries of Wiwynn (3) Endorsement/guarantee limit (NT$ thousands): 53,273,794 (4) Original endorsement/guarantee balance (NT$ thousands): 6,581,379 (5) Amount of new endorsement/guarantee (NT$ thousands): 11,932,403 (6) Endorsement/guarantee balance up to the date of occurrence (NT$ thousands): 18,513,782 (7) Actual amount utilized by the endorsed/guaranteed company (NT$ thousands): 0 (8) Reason for the new endorsement/guarantee: For WYMUS factory lease endorsement/guarantee 3. Collateral provided by the endorsed/guaranteed company: (1) Content: None (2) Value (NT$ thousands): 0 4. Most recent financial statements of the endorsed/guaranteed company: (1) Capital (NT$ thousands): 9,700,636 (2) Accumulated earnings/losses (NT$ thousands): -9,628 5. Conditions for release of endorsement/guarantee liability: (1) Conditions: Automatic release upon contract expiration (2) Date: Contract expiration date 6. Total endorsement/guarantee limit (NT$ thousands): 177,579,316 7. Endorsement/guarantee balance up to the date of occurrence (NT$ thousands): 128,622,992 8. Ratio of endorsement/guarantee balance up to the date of occurrence to net worth of public company's most recent financial statements: 72.43 9. Ratio of total endorsement/guarantee, long-term investments, and loans to net worth of public company's most recent financial statements up to the date of occurrence: 15.73 10. Other matters to be specified: None