CNOOC Limited, incorporated in Hong Kong, has formalised a transition to electronic dissemination for all future corporate communications directed at non-registered holders of its Hong Kong-listed shares.

Under the new framework, English and Chinese versions of directors’ reports, annual and interim reports, meeting notices, listing documents, circulars and proxy forms will be made available on both the Hong Kong Stock Exchange website (www.hkexnews.hk) and the “Investor Relations” section of CNOOC’s corporate website (www.cnoocltd.com).

Key implementation points:

1. Target group • Non-registered holders of CNOOC’s Hong Kong-traded shares (stock code 00883). • Investors hold their shares via banks, brokers, custodians, nominees or HKSCC Nominees Limited (“Intermediaries”).

2. Opt-in procedure for e-delivery • Shareholders wishing to receive electronic versions must notify their Intermediaries and provide a valid email address.

3. Option for printed copies • Investors preferring hard-copy materials can complete and return the enclosed reply form to CNOOC’s Hong Kong share registrar—Computershare Hong Kong Investor Services Limited. • Printed-copy requests remain effective for one year or until revoked, replaced, or the investor ceases to hold the shares, whichever is earlier.

4. Registrar contact information • Address: 17M Floor, Hopewell Centre, 183 Queen’s Road East, Wan Chai, Hong Kong. • Email: cnooc.ecom@computershare.com.hk • Telephone enquiry line: (852) 2862 8688 (09:00–18:00, Mon–Fri, excluding Hong Kong public holidays).

The initiative supports faster information flow, cost efficiency and environmental benefits by reducing paper usage, aligning CNOOC with prevailing market practices for shareholder communication in Hong Kong.