The 1st Quarter Consolidated financial statements for 2026 of Tan Cang Offshore Services JSC.

Date of Publication: 17 April, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “The 1st Quarter Consolidated financial statements for 2026 of Tan Cang Offshore Services JSC.”. Please kindly find the detailed document attached. Sincerely,

The 1st Quarter Separate financial statements for 2026 of Tan Cang Offshore Services JSC.

Date of Publication: 17 April, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “The 1st Quarter Separate financial statements for 2026 of Tan Cang Offshore Services JSC.”. Please kindly find the detailed document attached. Sincerely,

BOD Resolution No. 09A/2026/NQ-HDQT dated 10th April, 2026 on Approval of the auction participation plan for the acquisition of existing shareholders’ capital contribution interest in Tan Cang Gantry JSC., in order to increase the equity interest of Tan Cang Offshore Services JSC.

Date of Publication: 15 April, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “BOD Resolution No. 09A/2026/NQ-HDQT dated 10th April, 2026 on Approval of the auction participation plan for the acquisition of existing shareholders’ capital contribution interest in Tan Cang...

BOD Resolution No. 09A/2026/NQ-HDQT dated 10th April, 2026 on Approval of contracts/transactions between Tan Cang Offshore Services JSC. and Tan Cang Gantry JSC.

Date of Publication: 10 April, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “BOD Resolution No. 09A/2026/NQ-HDQT dated 10th April, 2026 on Approval of contracts/transactions between Tan Cang Offshore Services JSC. and Tan Cang Gantry JSC.”. Please kindly find the...

The 2025 Annual Report

Date of Publication: 1 April, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “The 2025 Annual Report”. Please kindly find the detailed document attached. Sincerely,

BOD Resolution No. 08/2026/NQ-HDQT dated 31st March, 2026 on the extension of the plan for organizing the 2026 Annual General Meeting of Shareholders

Date of Publication: 31 March, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “BOD Resolution No. 08/2026/NQ-HDQT dated 31st March, 2026 on the extension of the plan for organizing the 2026 Annual General Meeting of Shareholders”. Please kindly find the...

Notice of transaction in shares of affiliated person of internal person

Date of Publication: 19 March, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “Notice of transaction in shares of affiliated person of internal person”. Please kindly find the detailed document attached. Sincerely,

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

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...

The 2025 Separate financial statements of Tan Cang Offshore Services JSC. and the Explanation document No. 061/2026/TOS-GT on explanation for the change in PAT on the 2025 Separate financial statements exceeding 10% compared to 2024

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 Separate financial statements of Tan Cang Offshore Services JSC. and the Explanation document No. 061/2026/TOS-GT on explanation for the change in PAT on the 2025...

Report on corporate governance for 2025

Date of Publication: 29 January, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “ Report on corporate governance for 2025”. Please kindly find the detailed document attached. Sincerely,

The 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

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 Separate financial statements for 2025 of Tan Cang Offshore Services JSC. and the Explanation document No. 019/2026/TOS-GT on the change in PAT on the 4th Quarter Separate financial statements exceeding 10% compared to the same period in 2024

Date of Publication: 28 January, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “ The 4th Quarter Separate financial statements for 2025 of Tan Cang Offshore Services JSC. and the Explanation document No. 019/2026/TOS-GT on the change in PAT on...