Date of Publication: 28 January, 2026

To: Esteemed Shareholders

Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “ TThe 4th Quarter Consolidated financial statements for 2025 of Tan Cang Offshore Services JSC. and the Explanation document No. 018/2026/TOS-GT on the change in PAT on the 4th Quarter Consolidated financial statements exceeding 10% compared to the same period in 2024”. Please kindly find the detailed document attached.

Sincerely,