SpaceX's $28.5 trillion TAM claim draws scrutiny as IPO nears

SpaceX is targeting a valuation of at least $1.8 trillion in its upcoming IPO, but the company's claim of a $28.5 trillion total addressable market — including $23 trillion from enterprise AI applications — is drawing skepticism from investors and analysts reviewing the S-1 prospectus filed May 20.

"The TAM figure is so large it essentially assumes SpaceX will capture a meaningful share of the global AI infrastructure market before that market even exists in its projected form," said a capital markets strategist at a top-five underwriter, who asked not to be named because the IPO is in a quiet period.

The filing reveals a company with $18.7 billion in 2025 revenue but a net loss of $4.94 billion, swinging from a $791 million profit in 2024. Only one of three segments — Starlink, which generated $11.4 billion in revenue and $4.4 billion in operating profit — is consistently profitable. The space business lost $657 million on $4.1 billion in revenue, weighed down by $3 billion in Starship development costs, while the newly consolidated AI segment posted a $6.4 billion operating loss on just $3.2 billion in revenue. In the first quarter of 2026 alone, the AI segment burned $2.5 billion on $818 million of revenue.

The $28.5 trillion TAM — which SpaceX calls "the largest actionable total addressable market in human history" — is the linchpin of a valuation that would make SpaceX the largest industrial company by market cap on day one. If the IPO prices at $1.8 trillion, the enterprise value-to-revenue multiple would exceed 70 times, far above Tesla's 11 times and Nvidia's 25 times. The company expects to begin marketing the offering as soon as June 4 and price around June 11, with Goldman Sachs, Morgan Stanley, Bank of America, Citigroup and JPMorgan Chase leading a syndicate of 21 underwriters.

The TAM breakdown is particularly contentious. SpaceX attributes $22.7 trillion of the $28.5 trillion figure to enterprise applications, implying that Starlink's satellite internet business — which generated $11.4 billion in revenue last year — is not the company's most valuable long-term asset. Instead, management is betting on xAI, the artificial intelligence unit Musk merged into SpaceX in February at a combined $1 trillion valuation, with xAI valued at $250 billion.

The AI segment's near-term revenue depends heavily on a single customer. Anthropic, the rival AI company Musk publicly called "evil" earlier this year, is paying SpaceX $1.25 billion per month for compute capacity at the Colossus data centers in Memphis. The S-1 describes monthly payments running through May 2029, which annualizes to $15 billion and totals roughly $45 billion over the full term. But Musk clarified on X that the agreement is a 180-day lease with a mutual 90-day cancellation notice, meaning the $45 billion commitment is effectively a six-month rental.

Standard data center economics depend on decade-long anchor tenants. Hyperscalers such as Microsoft, Meta and Google sign 10-to-15-year leases with locked-in capacity commitments to underwrite billions of dollars in GPU, networking and power infrastructure. A 180-day lease with a 90-day cancellation clause is closer to a month-to-month rental.

Starlink's own metrics add another layer of concern. The satellite internet service has scaled to 10.3 million subscribers across 164 markets, roughly double its count a year earlier. But average monthly revenue per user has fallen from about $99 in 2023 to about $66 in the first quarter of 2026 as the company pushes into lower-priced markets abroad.

The largest IPOs in history have a mixed track record. Saudi Aramco went public in 2019 at a valuation near $1.7 trillion and its shares still trade below the listing price. Alibaba's 2014 US debut, the largest of its era, has delivered virtually no net return over the past decade. The pattern is that a deal this hyped tends to price in years of success upfront, leaving little margin for error.

SpaceX plans to list on Nasdaq and Nasdaq Texas under the ticker SPCX. Through a dual-class share structure, Musk would retain voting control after the offering. Retail allocation is reportedly set at 30 percent of the float, roughly three times the standard for a mega-cap IPO, which could amplify volatility in the early days of trading.

This article is for informational purposes only and does not constitute investment advice.