CNOOC Limited (中国海洋石油有限公司) is China's largest producer of offshore crude oil and natural gas. It is a major subsidiary of China National Offshore Oil Corporation (CNOOC) and has been listed in Hong Kong SEHK: 883 and in New York NYSE: CEO since February 2001. It was admitted as a constituent stock of the Hang Seng Index in July 2001. In September 2013 it was listed on the Toronto Stock Exchange following its acquisition of Canadian oil and gas company Nexen Inc.
China National Offshore Oil Corporation or CNOOC, is a state-owned enterprise based in Beijing, capital of China. In order to float most of its assets in Hong Kong stock exchange, a special purpose vehicle was incorporated in Hong Kong as an intermediate holding company, in order to transfer the control of some subsidiaries to the company. Thus, it was considered as a red chip company of the exchange, due to its government background but incorporated outside mainland China. As of 31 October 2017[update], the company had a market capitalization of HK$474 billion.
CNOOC Ltd's parent, China National Offshore Oil Corporation (CNOOC), is the third largest of the "Big Three" Chinese oil companies, and traditionally specialised in offshore upstream exploration and production, whereas CNPC Group specialised in onshore upstream exploration and production, and Sinopec Group specialised in refining and marketing. These distinctions are now increasingly blurred as the three companies compete in all areas. All of the "Big Three" have vested the majority of revenue producing assets in listed Hong Kong subsidiaries. CNPC into PetroChina, Sinopec Group into Sinopec Limited, and CNOOC Group into CNOOC Limited.
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