On April 8, 2025, in response to market volatility, Cnooc Limited disclosed a share purchase plan by its controlling shareholder, China National Offshore Oil Corporation. The progress of this plan has been adjusted due to factors including the blackout periods for listed companies' periodic reports and earnings forecasts, domestic and international holiday market closures, and shifting market conditions.

During a recent investor interaction on the online platform, Cnooc Limited confirmed on August 10 that, driven by a firm belief in the company's long-term stable growth, China National Offshore Oil Corporation has extended the original buyback plan's timeframe by 12 months, while leaving all other terms unchanged. The company stated it will strictly adhere to regulatory disclosure requirements for future purchase updates.