Ultra Petroleum Corp. (Ultra) is an independent oil and gas company. The Company is engaged in the development, production, operation, exploration and acquisition of oil and natural gas properties. The Company operates in developing its natural gas reserves in the Green River Basin of southwest Wyoming, the Pinedale and Jonah fields, its oil reserves in the Uinta Basin in northeast Utah and its natural gas reserves in the north-central Pennsylvania area of the Appalachian Basin. The Company holds interest in the producing and non-producing properties in the Pinedale field in Sublette County, Wyoming (the SWEPI Properties). The SWEPI Properties consists of approximately 19,600 net mineral acres in Wyoming and associated oil and gas production.