Empire Energy Group Limited is engaged in the acquisition, development, production, exploration and sale of oil and natural gas. The Empire Company sells its oil and gas products primarily to owners of domestic pipelines and refiners located in Pennsylvania, New York and Kansas. The Company operates in two segments: Oil & Gas, which includes all oil and gas operations located in the USA. Revenue is derived from the sale of oil and gas and operation of wells, and Investments, which include all investments in listed and unlisted entities, including the investment in Empire Energy Group USA. Revenue is derived from the sale of the investments. The Company�s revenue from external customers is derived from operations in the USA. Effective September 9, 2013, Empire Energy Group Ltd acquired the remaining 10% stake, which it did not already own in, Empire Energy USA LLC.