Atlas Energy, L.P. (Atlas Energy) is a limited partnership. The Company's assets consist of the Company's ownership interests in the Atlas Resource Partners, L.P. (ARP), an independent developer and producer of natural gas, crude oil and natural gas liquids (NGL), with operations in basins across the United States; Atlas Pipeline Partners, L.P. (APL) a midstream energy service provider engaged in natural gas gathering, processing and treating services in the Anandarko and Permian Basins of the United States, and Lightfoot Capital Partners, LP (Lightfoot LP) and Lightfoot Capital Partners GP, LLC (Lightfoot GP), the general partner of Lightfoot L.P. (collectively, Lightfoot), entities which incubate new master limited partnerships (MLPs) and invest in existing MLPs. As of December 31, 2012, the Company had an approximate 16% general partner interest and 12% limited partner interest in Lightfoot.