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�s principal business activities are developing its long-life natural gas reserves in the Green River Basin of Wyoming, the Pinedale and Jonah fields, its oil reserves in the Uinta Basin in Utah and its natural gas reserves in the Appalachian Basin of Pennsylvania. As of December 31, 2013, Ultra owned interests in approximately 84,000 gross (49,000 net) acres in Wyoming covering approximately 190 square miles. Ultra�s operations in north-central Pennsylvania are focused on assessing, exploring and developing its position in the Devonian aged Marcellus Shale and other horizons at depths between approximately 4,500 and 8,500 feet. As of December 31, 2013, the Company owned interests in approximately 473,000 gross (250,000 net) acres in Pennsylvania.