Linn Energy, LLC (LINN Energy) is an independent oil and natural gas company. The Company is engaged in acquiring, developing and maximizing cash flow from a growing portfolio of long-life oil and natural gas assets. The Company's properties are located in the United States , in the Mid-Continent, the Hugoton Basin, the Green River Basin, the Permian Basin, Michigan, Illinois, the Williston/Powder River Basin, California and east Texas. Proved reserves at December 31, 2012, were 4,796 billions of cubic feet equivalent, of which approximately 24% were oil, 54% were natural gas and 22% were natural gas liquids (NGL). In December 2013, Linn Energy LLC and Linn Co, LLC (Linn Co) announced the completion of the merger between LinnCo and Berry Petroleum Company (Berry), where LinnCo had acquired all of Berry's interest.