A catalyst composition having superior hydrotreating activity which catalyst is comprised of salts and/or complexes of Group VIII metals with Group VI metal heteropolyacids on an inorganic oxide support material, wherein the concentration of Group VIII metal ranges from about 2 to 20 wt. %, and the concentration of Group VI metal ranges from 5 to 50 wt. %, which percents are on support and which catalyst composition is substantially free of free water.