 SAN ANTONIO--BUSINESS WIRE--NuStar Energy L.P. NYSE: NS today announced that its Board of Directors has declared a fourth quarter 2020 common unit distribution of 0.40 per unit. The fourth quarter common unit distribution will be paid on February 12, 2021 to holders of record as of February 8, 2021. NuStar Energy L.P.s Board of Directors also declared a fourth quarter 2020 Series A preferred unit distribution of 0.53125 per unit, a Series B preferred unit distribution of 0.47657 per un 