Elon Musk's SpaceX shares opened at $150/share, significantly higher than its IPO price of $135/share, after raising $75 billion in its initial public offering. SpaceX has surpassed $2 trillion in market valuation, with shares jumping 22% to $164/share soon after listing. Musk is set to receive 350 million Class B shares, making him the world's first trillionaire.