The switch in the ranking came after a blockbuster earnings report from Oracle, powered by multibillion-dollar orders, sent Oracle stock shooting up. Oracle cofounder Larry Ellison has wrested the title of the world's richest person from longtime holder Elon Musk. On Wednesday, as stock in Ellison's software giant rocketed more than a third in a stunning few minutes of trading, Ellison's net worth surpassed the Tesla CEO, according to wealth tracker Bloomberg.