【Wistron】Announcement regarding the company's new endorsement guarantee amount reaching Article 25, Paragraph 1, Subparagraph 4 of the Operating Procedures requiring public announcement.

1. Date of occurrence of the event: 2026/05/08 (Republic of China Calendar Year 115/05/08) 2. Endorsement guarantee beneficiary: (1) Company name: WMX (2) Relationship with the company providing the endorsement guarantee: Wholly-owned subsidiary, directly or indirectly held 100% by the company. (3) Endorsement guarantee limit (in thousands of NTD): 57,055,017 (4) Original endorsement guarantee balance (in thousands of NTD): 3,781,291 (5) Amount of new endorsement guarantee (in thousands of NTD): 2,205,210 (6) Endorsement guarantee balance as of the date of occurrence (in thousands of NTD): 5,986,501 (7) Actual amount drawn by the endorsed company (in thousands of NTD): 3,781,291 (8) Reason for the new endorsement guarantee: To meet the operational needs of the subsidiary, applying for credit and financing lines from banks.

(1) Company name: WJP (2) Relationship with the company providing the endorsement guarantee: Wholly-owned subsidiary, directly or indirectly held 100% by the company. (3) Endorsement guarantee limit (in thousands of NTD): 57,055,017 (4) Original endorsement guarantee balance (in thousands of NTD): 496,000 (5) Amount of new endorsement guarantee (in thousands of NTD): 198,400 (6) Endorsement guarantee balance as of the date of occurrence (in thousands of NTD): 694,400 (7) Actual amount drawn by the endorsed company (in thousands of NTD): 496,000 (8) Reason for the new endorsement guarantee: To meet the operational needs of the subsidiary, applying for credit and financing lines from banks.

(1) Company name: WUS (2) Relationship with the company providing the endorsement guarantee: Wholly-owned subsidiary, directly or indirectly held 100% by the company. (3) Endorsement guarantee limit (in thousands of NTD): 57,055,017 (4) Original endorsement guarantee balance (in thousands of NTD): 37,549,094 (5) Amount of new endorsement guarantee (in thousands of NTD): 11,026,050 (6) Endorsement guarantee balance as of the date of occurrence (in thousands of NTD): 48,575,144 (7) Actual amount drawn by the endorsed company (in thousands of NTD): 20,222,444 (8) Reason for the new endorsement guarantee: To meet the operational needs of the subsidiary, applying for credit and financing lines from banks.

(1) Company name: WiAdvance (緯謙) (2) Relationship with the company providing the endorsement guarantee: Subsidiary with 68.21% direct or indirect shareholding by the company. (3) Endorsement guarantee limit (in thousands of NTD): 57,055,017 (4) Original endorsement guarantee balance (in thousands of NTD): 872,000 (5) Amount of new endorsement guarantee (in thousands of NTD): 100,000 (6) Endorsement guarantee balance as of the date of occurrence (in thousands of NTD): 972,000 (7) Actual amount drawn by the endorsed company (in thousands of NTD): 572,000 (8) Reason for the new endorsement guarantee: To meet the operational needs of the subsidiary, applying for credit and financing lines from banks.

(1) Company name: Wistron Smart City (緯成) (2) Relationship with the company providing the endorsement guarantee: Wholly-owned subsidiary, directly or indirectly held 100% by the company. (3) Endorsement guarantee limit (in thousands of NTD): 57,055,017 (4) Original endorsement guarantee balance (in thousands of NTD): 0 (5) Amount of new endorsement guarantee (in thousands of NTD): 600,000 (6) Endorsement guarantee balance as of the date of occurrence (in thousands of NTD): 600,000 (7) Actual amount drawn by the endorsed company (in thousands of NTD): 0 (8) Reason for the new endorsement guarantee: To meet the operational needs of the subsidiary, applying for credit and financing lines from banks. 3. Collateral provided by the endorsed company: (1) Content: None (2) Value (in thousands of NTD): 0 4. Endorsed company's most recent financial statements: (1) Capital (in thousands of NTD): 14,494,095 (2) Accumulated profit/loss (in thousands of NTD): 610,198 5. Conditions for release of endorsement guarantee liability: (1) Conditions: Automatically released upon contract expiration. (2) Date: Contract expiration date. 6. Total endorsement guarantee limit (in thousands of NTD): 190,183,392 7. Endorsement guarantee balance as of the date of occurrence (in thousands of NTD): 139,339,813 8. Ratio of endorsement guarantee balance provided by A (Wistron) to the net worth of the publicly issued company's most recent financial statements as of the date of occurrence: 73.27% 9. Ratio of total endorsement guarantee, long-term investments, and loans to others to the net worth of the publicly issued company's most recent financial statements as of the date of occurrence: 38.05% 10. Other matters that should be specified: 115Q1 Unit: Thousands of NTD Currency Capital Currency Accumulated Profit/Loss WMX USD 58,291 USD 32,651 WJP JPY 90,000 JPY 1,698,966 WUS USD 245,000 USD -14,747 WiAdvance NTD 227,800 NTD -392,866 Wistron Smart City NTD 4,400,000 NTD 19,786