SpaceX, the rocket manufacturer and rocket maker, has confidentially filed for an initial public offering (IPO), potentially becoming the largest stock market listing on record. The firm could raise more than $50 billion in the IPO, surpassing the 2019 flotation of Saudi Aramco. The public listing could signal that space exploration has moved from a speculative venture to a mainstream investment theme. The filing comes after SpaceX merged with Musk's artificial intelligence startup xAI in a deal valued the rocket company at $1 trillion and the developer of the Grok chatbot at $250 billion. The IPO could attract strong demand from both retail and institutional investors, some drawn by Musk's brand and others seeking exposure to SpaceX's growing space and satellite businesses. A listing would bring scrutiny to Musk's sprawling business empire, which includes Tesla, Tesla, and The Boring Company.