SpaceX shares have jumped 19 per cent in their Nasdaq debut, sending the company's value past $US2 trillion ($A2.8 trillion) to make it the sixth-biggest US company by value and turning Elon Musk into the world's first trillionaire.
Investors jumped at the chance on Friday to get a piece of Musk's sprawling empire spanning rockets, satellites and AI after the record-setting $US75 billion ($A106 billion) initial public offering.
More than 510 million shares worth about $US84 billion ($A119 billion) changed hands, even though SpaceX is currently unprofitable and generated only a fraction of the revenue brought in by similarly valued tech giants.