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SM ENERGY ANNOUNCES CLOSING OF POWDER RIVER BASIN ASSET SALE AND PROVIDES ADDITIONAL UPDATES

SM Energy Company (the “Company”) (NYSE: SM) today announced that it completed the previously announced sale of the majority of its assets in the Powder River Basin for $500 million ($491.5 million net cash proceeds, subject to final purchase price adjustments). Assets sold include approximately 112,200 predominantly contiguous net acres with average December 2017 net production of approximately 2,200 Boe per day (51% oil, 18% NGLs and 31% natural gas). The buyer is Northwoods Operating LLC, a portfolio company