San Leon Energy plc is engaged in the exploration and production of oil and gas. In Poland, it has interest in Baltic Basin, SW Carboniferous Basin, and Permian Basin. In Ireland, the Company has interest in eight offshore Ireland assets, consisting four operated licenses on the Atlantic Margin and four Celtic Sea assets. San Leon has interests in the Tarfaya and Zag license areas and two offshore licenses: Foum Draa and Sidi Moussa. In Spain, the Company has interest in Cantabrian/Pyrenees Basin and Ebro Basin. The Company holds a 100% participating interest in the Durresi Block, offshore Albania. The license area covers 4,200 square kilometers. The Company owns five permits in Italy. Two in the Po Valley and three offshore Sicily. In Germany, it has interest in Aschen Concession in the Lower Saxon Basin. On November 10, 2011, the Company acquired Realm Energy International Corporation.