China National Offshore Oil Corporation (CNOOC)

China National Offshore Oil Corporation, or CNOOC is the third-largest national oil company in China, after CNPC (parent of PetroChina) and China Petrochemical Corporation (parent of Sinopec). The CNOOC Group focuses on the exploitation, exploration and development of crude oil and natural gas in offshore China, along with its subsidiary COOEC.

The company is owned by the government of the People's Republic of China, and the State-Owned Assets Supervision and Administration Commission of the State Council (SASAC) assumes shareholder rights and obligations on the government's behalf. One subsidiary, CNOOC Limited, is listed on the Hong Kong Stock Exchange; the other, China Oilfield Services, is listed on the Hong Kong and New York Stock Exchanges. In the 2020 Forbes Global 2000, CNOOC was ranked as the 126th largest public company in the world. In 2023, the company's seat in Forbes Global 2000 was 85.