CHINA OILFIELD (02883): Controlling shareholder CNOOC Limited Group has cumulatively increased its holdings by 815,000 A shares and 22,858,000 H shares.

CHINA OILFIELD (02883) announced that the Company received a notice from its controlling shareholder CNOOC Limited Group (CNOOC Limited Group). From September 24, 2026 to September 28, 2026, CNOOC Limited Group increased its holdings of 405,000 A shares of the Company through centralized bidding via the trading system of the Shanghai Stock Exchange, accounting for approximately 0.01% of the Company's total issued shares, with the amount of the A share increase approximately RMB 4.9356 million (excluding taxes and fees); and increased its holdings of 5 million H shares of the Company through on-exchange trading via the system of The Stock Exchange of Hong Kong Limited, accounting for approximately 0.10% of the Company's total issued shares, with the amount of the H share increase approximately RMB 31.7158 million (excluding taxes and fees). After the implementation of the above increases, CNOOC Limited Group has cumulatively increased its holdings by 815,000 A shares under this increase plan, with the cumulative amount of the A share increase approximately RMB 9.9166 million (excluding taxes and fees); and has cumulatively increased its holdings by 22,858,000 H shares, with the cumulative amount of the H share increase approximately RMB 125 million (excluding taxes and fees). As of the date of this announcement, CNOOC Limited Group held a total of 2.4345 billion shares of the Company, and its proportion of the Company's total issued shares increased from approximately 50.91% before the above increases to approximately 51.02%.