Elon Musk has become the world’s first trillionaire after SpaceX’s initial public offering in June valued the company at roughly $2.85 trillion, vaulting it past Amazon to become the fifth-largest listed firm globally. The listing created an estimated 4,400 new millionaires among employees who held stock grants, and more than 400 centimillionaires, according to pre-IPO analyst projections. Shares surged from an offer price of $135 to above $220 before settling, a 62 percent increase that concentrated enormous wealth in the hands of early staff and the chief executive.

The valuation is anchored not in spaceflight but in terrestrial artificial-intelligence infrastructure. SpaceX has secured compute contracts with Anthropic, Google and Reflection AI for its Colossus supercomputers, which together provide roughly one gigawatt of capacity. Those agreements are expected to generate more than $28 billion in annual revenue, far exceeding the company’s AI-related revenue of about $3.2 billion in 2025. The firm invested nearly $18 billion in AI infrastructure and development this year, including $12.7 billion in capital expenditure, dwarfing its spending on launch services and the Starlink satellite-internet business. J.P. Morgan expects terrestrial AI compute capacity to expand to nine gigawatts by 2029, after which the company may shift focus to orbital computing for incremental gains. Analysts at Bank of America caution that the long-term viability of orbital data centres remains unproven and depends on technological milestones not yet achieved.

The wealth event has reignited debate over taxation and inequality. Nobel laureate Paul Krugman and Yale economist Natasha Sarin argue that Musk’s trillion-dollar fortune reflects how the modern economy rewards ownership of rapidly appreciating assets and exposes the limits of a tax system designed more than a century ago. The windfall also had immediate philanthropic spillovers: SpaceX President Gwynne Shotwell and her husband donated roughly $300 million in stock to Trump Accounts, a government initiative providing $1,000 to every American child born between 2025 and 2028. Viewed from London, FTSE Russell’s head of global investment research Indrani De noted that “AI is the only subject on the agenda” in much of the world, as the technology’s rally lifted everything from Caterpillar to utilities and delivered the best quarterly return for US domestic stock funds—14.8 percent—since 2020.

Near-term performance will be tested by the durability of the compute contracts. Analysts on Wall Street warn that the agreements contain termination clauses and should not be treated as guaranteed recurring revenue. The next factual milestone is the build-out toward the projected nine gigawatts of terrestrial capacity by 2029, which will determine whether the $28 billion annual revenue target materialises as contracts are renewed or replaced.