CNOOC Limited, listed under stock codes 00883 (HKD counter) and 80883 (RMB counter), has scheduled an Extraordinary General Meeting (EGM) for 10 December 2025 at 10:00 a.m. The meeting will take place at Island Shangri-La Hotel Hong Kong, Pacific Place, Supreme Court Road, Central, Hong Kong.

Two ordinary resolutions will be presented. The first concerns the approval of Non-exempt Continuing Connected Transactions. The second seeks to approve the Proposed Caps for each category of these transactions. Further information and the full text of these resolutions are included in the company’s circular dated 7 November 2025, which is available on the official website (www.cnoocltd.com) and the website of the Hong Kong Stock Exchange (www.hkexnews.hk).

Shareholders may appoint a proxy to attend and vote on their behalf. The proxy form and relevant authorization documents must be deposited at the company’s Hong Kong registrar, Computershare Hong Kong Investor Services Limited, no less than 36 hours before the start of the EGM. Attendance in person remains an option, and submission of a proxy does not preclude the right to participate directly in the meeting. Any shareholder planning to vote by proxy should follow all specified instructions and deadlines to ensure proper representation at the EGM.