Taiwan Navigation: Company Announces New Endorsement Guarantee for Subsidiary Tashin Marine Transport Co. (Announced in accordance with Article 25, Paragraph 1, Subparagraph 4 of the Regulations Governing Loaning of Funds and Making of Endorsements/Guarantees by Public Companies)

1. Date of occurrence of the event: 2026/04/28 2. Counterparty of the endorsement/guarantee: (1) Company name: Tashin Marine Transport Co., Ltd. (2) Relationship with the company providing the endorsement/guarantee: Wholly-owned subsidiary, 100% invested by the company. (3) Limit of endorsement/guarantee (NT$ thousands): 35,679,782 (4) Original endorsement/guarantee balance (NT$ thousands): 11,184,578 (5) New endorsement/guarantee amount (NT$ thousands): 1,919,700 (6) Endorsement/guarantee balance as of the date of occurrence (NT$ thousands): 13,104,278 (7) Actual amount used by the counterparty of the endorsement/guarantee (NT$ thousands): 8,166,838 (8) Reason for the new endorsement/guarantee: To act as a co-guarantor for Tashin subsidiary's bank credit application. 3. Collateral provided by the counterparty of the endorsement/guarantee: (1) Content: None. (2) Value (NT$ thousands): 0 4. Latest financial statements of the counterparty of the endorsement/guarantee: (1) Capital (NT$ thousands): 3,689,444 (2) Accumulated profit/loss (NT$ thousands): 8,331,595 5. Conditions for release from endorsement/guarantee liability: (1) Conditions: Subsidiary repays according to the agreement. (2) Date: Upon maturity of the subsidiary's credit agreement. 6. Total limit of endorsement/guarantee (NT$ thousands): 43,058,670 7. Endorsement/guarantee balance as of the date of occurrence (NT$ thousands): 13,104,278 8. Ratio of endorsement/guarantee balance provided by A as of the date of occurrence to the net worth of the public company's latest financial statements: 73.45% 9. Ratio of total endorsement/guarantee, long-term investments, and loans balance as of the date of occurrence to the net worth of the public company's latest financial statements: 95.44% 10. Other matters that should be specified: The aforementioned endorsement/guarantee amount is converted based on the Taiwan Bank's average spot exchange rate of 31.995 at the close of March 31, 2026.