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.