Stefano Valtulini comes for Calcinate in Italy and begun his ride to the World Championship in 2008 when racing in the Italian Minimoto Championship. From here he progressed through various MiniGP series before joining the Red Bull Rookies Cup in 2011, where he ended 11th. In 2012 he ended third in the Italian CIV Moto3™ and made his World Championship debut at Misano, ending 24th. The following years saw various injuries and technical problems hinder his advancement, but in 2015 he moved to the FIM CEV Repsol Moto3™ Junior World Championship with SIC58 Squadra Corse and ended the season eighth, having taken to the podium in Aragon. In 2016 he moved to the World Championship with MTA Team Italia.