World's richest person Elon Musk-founded SpaceX's valuation has surpassed $100 billion, CNBC reported. SpaceX has an agreement with new and existing investors to sell up to $755 million in stock from insiders at $560 a share, increasing its valuation to $100.3 billion, it added. SpaceX is now the second most valuable private company in the world, as per CB Insights.