China National Offshore Oil Corporation, or CNOOC Group (Chinese: 中国海洋石油总公司 Pinyin: Zhōngguó Háiyáng Shíyóu Zǒnggōngsī), is one of the largest national oil companies in China. It is the third-largest national oil company in the People's Republic of 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 exchange; the other, China Oilfield Services, is listed on the Hong Kong and New York exchanges. In the 2020 Forbes Global 2000, CNOOC was ranked as the 126th -largest public company in the world.CNOOC is responsible for 0.28% of global industrial greenhouse gas emissions from 1988 to 2015.