Rainbow S.r.l. (formerly known as Rainbow S.p.A) is an Italian animation studio that is best known for being the producers of the 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.r.l. is Iginio Straffi, who is also the creator of Winx Club, as well as the creator and director of Huntik. On February 4, 2011, Viacom, which already owns Nickelodeon, purchased an undisclosed, but a minority, stake in Rainbow.