Tesla, SpaceX, and the Battle to Be Musk’s Most Valuable Company

SpaceX trading is set to begin, officially making Tesla and SpaceX CEO Elon Musk a trillionaire. SpaceX is worth more to Musk than Tesla, but which company will turn out more valuable to investors is harder to say. Tesla stock was up 0.8% in premarket trading at $402.18 Friday, while and futures were up 0.4% and 0.6%, respectively.