The company has mutated into something that defies both comparison and logic.
SpaceX had its initial public offering last week. Now Elon Musk is a trillionaire on paper. But what is SpaceX? On one level, of course, SpaceX is a company that builds rockets and spacecraft and launches them into space. (Occasionally the rockets explode.) It is also the company that birthed Starlink, a satellite-internet business that generated more than $11 billion in revenue last year.
But the company can be defined in many ways. SpaceX is a financial instrument for Musk. Before the IPO, SpaceX acquired xAI, Musk’s artificial-intelligence company, which itself acquired X, the social-media site, back in 2025. The maneuver allowed SpaceX to claim that it believed it had “the largest actionable total addressable market in human history”: $28.5 trillion, to be precise. $26.5 trillion of that, according to the filing, would come from AI infrastructure and applications, meaning not from SpaceX’s core business of aerospace engineering and satellites.
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