Date of Publication: 13 March, 2026

To: Esteemed Shareholders

Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “The 2025 Consolidated financial statements of Tan Cang Offshore Services JSC. and the Explanation document No. 063/2026/TOS-GT on explanation for the change in PAT on the 2025 Consolidated financial statements exceeding 10% compared to 2024”. Please kindly find the detailed document attached.

Sincerely,