Atlas Energy Group, L.L.C. is a master limited partnership which, subsequent to the spin-off of Atlas Energy, L.P.'s non-midstream assets, will own the following interests: all of the general partner interest, incentive distribution rights and an approximate 28% limited partner interest in its upstream oil & gas subsidiary, Atlas Resource Partners, L.P.; the general partner interests, incentive distribution rights and limited partner interests in its private E&P development subsidiary; and a general partner interest in Lightfoot Capital Partners, an entity that invests directly in energy-related businesses and assets.