Cairn Energy plc (LSE: CNE, BSE: 532792) is a global oil and gas exploration company headquartered in Edinburgh, United Kingdom. It has operated interests in Albania, Bangladesh, Greenland, India, Nepal and Tunisia and produces around 33,000 barrels of oil equivalent per day. Its largest activities are in India, where it has made more than 20 discoveries in Rajasthan, including a major oil discovery in Mangala. As at 30 June 2010 it had total proven commercial reserves of 247.4 million barrels of oil equivalent.

Its primary listing is on the London Stock Exchange and it is a constituent of the FTSE 100 Index. It has a secondary listing on the Bombay Stock Exchange.

The company was founded in 1981 by Sir Bill Gammell, the former international Rugby player, who remains its CEO, his father James (Jimmy), his brother Pete and others. Its initial operations were in the USA and, following its listing on the London Stock Exchange in 1988, it expanded into the UK North Sea and internationally (Papua New Guinea, Spain, Vietnam, China and Australia). Cairn acquired Conoco's UK onshore acreage in 1988 and became one of the largest operators of UK onshore oil production with the Palmers Wood oil field just south of London, near Junction 6 of the M25,[5] Humbly Grove (near Basingstoke) and others.

Cairn's expansion started with a substantial (non-operated) gas discovery (East Cameron 331) in the Gulf of Mexico in 1993 followed by another large gas discovery at Sangu, offshore Bangladesh near Chittagong, in 1996. In parallel, Cairn launched a series of takeovers of public listed companies - Teredo Petroleum in 1994, Holland Sea Search NV in 1995 and Command Petroleum in 1996.

Source: Wikipedia