China Oilfield Services Limited (China Oilfield; HKEX: 02883) released a voluntary update on the progress of the shareholding-increase plan initiated by its controlling shareholder, China National Offshore Oil Corporation (CNOOC).

Between 24 and 28 September 2026, CNOOC acquired 405,000 A-shares on the Shanghai Stock Exchange for RMB4.94 million and 5.00 million H-shares on the Hong Kong Stock Exchange for RMB31.72 million. The combined 5.41 million shares represent an additional 0.11 % of China Oilfield’s total issued share capital.

Including these trades, cumulative purchases under the plan amount to 815,000 A-shares and 22.86 million H-shares, costing RMB9.92 million and RMB124.61 million, respectively. The total outlay has reached RMB134.53 million, equivalent to about 45 % of the RMB300 million minimum commitment and 27 % of the RMB500 million upper limit set for the programme.

CNOOC now holds 2.43 billion China Oilfield shares, increasing its ownership from 50.91 % to 51.02 %.

The shareholding-increase plan, compliant with China’s Securities Law and related regulations, is scheduled to run until 8 April 2027. The board will continue to monitor execution and disclose further developments. Investors are reminded that market volatility or other unforeseen factors could affect the final outcome of the programme.