Cairn Energy PLC (Cairn) is a United Kingdom-based independent oil and gas exploration and development company. The Company's portfolio is focused in three geographical regions: North West Europe, the Atlantic Margin and the Mediterranean. Cairn has exploration and appraisal assets in the Atlantic Margin, North West Europe and the Mediterranean, and core development assets in the North Sea. The Company has interests in two United Kingdom North Sea developments, Catcher and Kraken, and a third development, Skarfjell. It has 34 licenses in the United Kingdom and Norway. Cairn holds a 40% interest in three contiguous blocks offshore Senegal. The Company's wholly owned principal subsidiary is Capricorn Oil Limited.