Atlas Pipeline Partners, L.P., (NYSE:APL) (the “Partnership”) is a publicly-traded, energy master limited partnership (MLP) engaged in the transmission, gathering, and processing of natural gas in the Mid-Continent United States and the Appalachian Basin. APL was formed in August 1999 and completed its initial public offering in February 2000. In the Mid-Continent regions of Oklahoma, Arkansas, Kansas and Texas, APL owns and operates 9,100 miles of active gathering pipeline, eight natural gas processing plants and one treatment facility. In the Appalachian Basin, Atlas Pipeline and the Williams Companies (NYSE: WMB) formed a joint venture (Laurel Mountain Midstream, LLC) to operate the over 1,800 miles of natural gas gathering pipelines in Pennsylvania, New York, Ohio and Tennessee, to which more than 7,400 wells are currently connected. The predominant source of gas that APL gathers in the Appalachian Basin is from wells operated by Atlas Energy Resources, LLC (NYSE:ATN).