【CTCI】Announcement Regarding Endorsement and Guarantee by the Company for its Subsidiary Exceeding the Regulations for Publicly Issued Companies' Fund Lending and Endorsement/Guarantee Handling, Article 25, Paragraph 1, Subparagraphs 3 and 4.

Date of Event: May 12, 2026 (115/05/12) Guaranteed Entity: (1) Company Name: CTCI Singapore Pte. Ltd. (2) Relationship with Guarantor Company: Directly invested subsidiary (3) Endorsement/Guarantee Limit (in thousands): 124,567,722 (4) Original Outstanding Endorsement/Guarantee Balance (in thousands): 1,064,583 (5) Amount of New Endorsement/Guarantee (in thousands): 23,384,544 (6) Outstanding Endorsement/Guarantee Balance as of Event Date (in thousands): 24,449,127 (7) Amount Actually Drawn by Guaranteed Company (in thousands): 0 (8) Reason for New Endorsement/Guarantee: For business needs, as part of subsidiary contract endorsement and guarantee. Collateral Provided by Guaranteed Company: (1) Content: None (2) Value (in thousands): 0 Guaranteed Company's Most Recent Financial Statement: (1) Capital (in thousands): 1,971,135 (2) Accumulated Profit/Loss (in thousands): -1,920,948 Conditions for Release of Endorsement/Guarantee Liability: (1) Conditions: Release of endorsement/guarantee liability upon maturity. (2) Date: SGD 23,384,544 thousand endorsement/guarantee liability until 2029/10/01 Total Endorsement/Guarantee Limit (in thousands): 207,612,870 Outstanding Endorsement/Guarantee Balance as of Event Date (in thousands): 85,606,884 As of Event Date, Ratio of A's Outstanding Endorsement/Guarantee Balance to Publicly Issued Company's Latest Financial Statement Net Worth: 412.34 As of Event Date, Ratio of Combined Outstanding Endorsement/Guarantee, Long-Term Investment, and Fund Lending to Publicly Issued Company's Latest Financial Statement Net Worth: 118.16 Other Matters to Note: 1. The exchange rates and amounts actually drawn by the guaranteed company used in this announcement are calculated based on the figures at the end of the previous month. 2. The total outstanding balance of endorsement/guarantee, long-term investment, and fund lending by this company to CTCI Singapore Pte. Ltd. is TWD 24,532,073 thousand, meeting the announcement standard in Article 1, Subparagraph 3.