According to Zacks, "NUSTAR GP HOLDINGS is a publicly traded limited liability company that owns the two percent general partner interest, a 18.4 percent limited partner interest and the incentive distribution rights in NuStar Energy L.P.They are one of the largest asphalt refiners and marketers and independent terminal and petroleum liquids pipeline operators in the nation with operations in the United States, Netherlands Antilles, Canada, Mexico, the Netherlands and the United Kingdom. " Other equities research analysts also recently issued reports about the stock.