Cairn Energy PLC | 77,964 followers on LinkedIn. Cairn Energy PLC is an independent, UK-based oil and gas exploration, development and production company | Cairn Energy PLC ('Cairn'​) is one of Europe's leading independent oil and gas exploration and production companies and is listed on the London Stock Exchange. Cairn has discovered and developed oil and gas reserves in a variety of locations around the world. The company historically focused its activities on the geographic region of South Asia where it operated for more than 20 years.