NuStar GP Holdings, LLC (NuStar GP Holdings) conducts operations through its indirect ownership interests in NuStar Energy L.P. (NuStar Energy). NuStar Energy is engaged in the terminalling and storage of petroleum products, the transportation of petroleum products and anhydrous ammonia, and petroleum refining and marketing. The Company operates in three segments: NuStar Energy's Storage Segment, NuStar Energy's Pipeline Segment and NuStar Energy's Asphalt and Fuels Marketing Segment. On January 1, 2013, NuStar Energy sold the San Antonio Refinery and related assets, which included inventory, a terminal in Elmendorf, Texas and a pipeline connecting the terminal and refinery. On December 13, 2012, NuStar Energy completed its acquisition of the TexStar Crude Oil Assets (as defined below), including 100% of the partnership interest in TexStar Crude Oil Pipeline, LP, from TexStar Midstream Services, LP and certain of its affiliates.