CNOOC Limited will convene its 2025 Annual General Meeting on 3 June 2026 at 10:00 a.m. at the Island Shangri-La Hotel, Hong Kong. The proxy form circulated to shareholders outlines nine ordinary resolutions to be put to vote.

Key agenda items 1. Financial statements: Shareholders will consider and receive the audited accounts, the independent auditors’ report and the directors’ report for the year ended 31 December 2025. 2. Board composition: The meeting proposes the re-election of four directors—Mr Zhang Chuanjiang (Non-executive), Mr Huang Yongzhang (Executive), Prof Lin Boqiang (Independent Non-executive) and Ms Li Shuk Yin Edwina (Independent Non-executive). 3. Remuneration: The board seeks authority to set future remuneration schemes and the remuneration of each director. 4. Auditor appointment: Ernst & Young Hua Ming LLP and Ernst & Young are nominated as domestic and overseas independent auditors, respectively, for the 2026 fiscal year, with the board authorised to fix their fees. 5. Dividends: • Final dividend for FY2025 – shareholders will vote to declare the payment. • Interim dividend for FY2026 – the board requests authorisation to determine the declaration plan and manage all related matters.

Voting mechanics • Shareholders may appoint any individual—or by default, the chairman of the meeting—as proxy. • Completed proxy forms must be lodged with Computershare Hong Kong Investor Services at least 36 hours before the meeting.

The full text of the resolutions is available in the AGM circular dated 7 May 2026 on both the company’s website and the Hong Kong Stock Exchange news portal.