SandRidge Permian Trust (the Trust) is a trust formed by SandRidge Energy, Inc. (SandRidge) to own royalty interests in 509 developed oil and natural gas wells located in Andrews County, Texas (the Producing Wells), and 888 oil and natural gas development wells to be drilled (the Development Wells) within an Area of Mutual Interest (AMI). The AMI consists of the Grayburg/San Andres formation in the Permian Basin in Andrews County, Texas. As of December 31, 2010, SandRidge held approximately 16,700 gross acres (15,900 net acres) in the AMI.The Underlying Properties consist of the working interest owned by SandRidge in the Permian Basin in Andrews County, Texas arising under leases and farmout agreements related to properties from which the PDP Royalty Interest and the Development Royalty Interest will be conveyed.