Date of Publication:  16 July, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “Information disclosure on the Signing of the Audit Contract for the 2026 Financial Statements”. Please kindly find the detailed document attached. Sincerely,

Date of Publication: 14  July, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “Announcement on Share issuance to increase charter capital from owner’s equity (replacing the Announcement dated 9th July, 2026)”. Please kindly find the detailed document attached. Sincerely,

Date of Publication: 13  July, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “BOD Resolution No. 25/2026/NQ-HDQT dated 13th July, 2026 on Approval of the change of the Record Date for shareholders entitled to receive shares issued to increase charter...

Date of Publication: 13  July, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “BOD Resolution No. 24/2026/NQ-HDQT dated 13th July, 2026 on Approval of adjusting the rounding method and the handling of fractional shares under Resolution No. 16/2026/NQ-HDQT dated 11th...

Date of Publication:  09 July, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “Announcement on Share issuance to increase charter capital from owner’s equity”. Please kindly find the detailed document attached. Sincerely,

Date of Publication:  09 July, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “BOD Resolution No. 23/2026/NQ-HDQT dated 9th July, 2026 on Approval of the Record Date for shareholders entitled to receive shares issued to increase charter capital from Owner’s...

Date of Publication:  23 June, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “BOD Resolution No. 18/2026/NQ-HDQT dated 23rd June, 2026 on Approval of contracts/transactions between TCO and Tan Cang Gantry JSC., Tan Cang Lach Huyen JSC., Tan Cang Information...

Date of Publication:  23 June, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “BOD Resolution No. 17/2026/NQ-HDQT dated 23rd June, 2026 on Approval of the appointment of Deputy General Director”. Please kindly find the detailed document attached. Sincerely,

Date of Publication:  12 June, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “BOD Resolution No. 16/2026/NQ-HDQT dated 11th June, 2026 on Approval of the Issuance of Shares to increase charter capital from Owner’s equity in 2026”. Please kindly find...

Date of Publication: 22 May, 2026 To: Esteemed Shareholders Tan Cang Offshore Services JSC. respectfully presents to our Shareholders and Interested Investors the “Minutes of BOS Meeting No. 2105/2026/BBH-BKS dated May 21st, 2026 regarding the election of the Head of BOS”. Please kindly find the detailed document attached. Sincerely,