"Rainbow S.p.A (formerly known as Rainbow S.r.l.) is an Italian animation studio that is best known for being the producers of the popular Winx Club series. They also have produced a number of other animated series such as Tommy and Oscar, Monster Allergy, Prezzy and co-producer of the new series, Huntik. The CEO of Rainbow S.p.A is Iginio Straffi, who is also the creator of Winx Club, as well as the creator and director of Huntik."
Source: Wikipedia, "Rainbow S.p.A.", available under the CC-BY-SA License.