Atlas Pipeline Holdings, L.P. owns and operates Atlas Pipeline Partners GP, LLC (Atlas Pipeline GP), the general partner of Atlas Pipeline Partners, L.P. (APL). The Company’s interest in APL consists of a 100% ownership in Atlas Pipeline GP, its general partner. APL is a midstream energy service provider engaged in the transmission, gathering and processing of natural gas in the Mid-Continent and Appalachian regions. APL is a provider of natural gas gathering services in the Anadarko, Arkoma and Permian Basins and the Golden Trend in the southwestern and mid-continent United States and the Appalachian Basin in the eastern United States. In addition, APL provides natural gas processing and treatment services in Oklahoma and Texas. APL also provides interstate gas transmission services in southeastern Oklahoma, Arkansas, southern Kansas and southeastern Missouri.