The SpaceX IPO Is Really a Capacity IPO
SpaceX's IPO order book is reportedly filling while the company sells compute capacity and previews new satellite designs. The oversubscription numbers are now in, and they confirm what the Anthropic
SpaceX's IPO order book is reportedly filling while the company sells compute capacity and previews new satellite designs. The oversubscription numbers are in, and they confirm what the Anthropic and Google contracts already suggested: this isn't a rocket company going public. It's a capacity company.
The receipts
Bloomberg Law reported Monday that the IPO is "well oversubscribed, with multiple institutional investors placing orders of about $10 billion or more." Yikes. Banks were expected to stop taking institutional orders after Wednesday's New York close.
The S-1 filing tells an infrastructure story. SpaceX defines COLOSSUS as its Memphis flagship data center and COLOSSUS II as facilities in Memphis and Southaven, Mississippi—collectively about 1.0 gigawatt of compute power in what they call "a coherent gigawatt-scale AI training cluster." They brought the first COLOSSUS cluster online in 122 days with about 100,000 H100 processors. The first COLOSSUS II cluster came online in 91 days with about 110,000 GB200 processors.
The capacity is already being sold like infrastructure. Anthropic agreed to pay $1.25 billion per month through May 2029 for access across both facilities. TechCrunch reported that Google will pay $920 million per month from October 2026 through June 2029 for approximately 110,000 NVIDIA GPUs and related components. Both contracts can be terminated by either party on 90 days' notice.
Google framed it as bridge capacity: "This is a short-term, timely agreement to ensure we have bridge capacity to meet surging customer demand for our agent platform, Gemini Enterprise, which has been even higher than we expected."
The satellite story connects dots. The S-1 defines "V3 satellites" as next-generation Starlink units designed for one Tbps of downlink capacity per satellite, with deployment expected in the second half of 2026 on Starship. SpaceX also detailed its orbital AI compute plan: early satellites would generate 100 kW of compute power, scaling toward 100 GW of AI compute capacity on solar-powered satellites each year by decade's end.
Business Insider reported that Musk showed more detailed orbital data center designs—a 20-meter-tall spacecraft with 70-meter wingspan using racks of AI chips, huge solar panels, and liquid radiators. The solar panels would be built at SpaceX's under-construction Gigasat factory in Bastrop, Texas.
The public-market test
This is a public-market test of whether investors will value SpaceX as a vertically integrated capacity company: launch capacity, satellite bandwidth capacity, terrestrial AI compute capacity, and eventually orbital compute capacity.
The Colossus contracts turn a futuristic AI-in-space pitch into near-term contracted revenue. TNW noted the Google and Anthropic deals create roughly $26 billion in annualized recurring revenue. But those 90-day termination rights matter. These feel less like locked-in SaaS and more like very large, revocable capacity reservations.
The satellite designs bridge today's Memphis data centers with tomorrow's orbital compute. V3 Starlink satellites supply the near-term connectivity story; the AI1 orbital data centers supply the long-term compute story. The oversubscription tells us demand isn't waiting for years of proof. The market is buying the capacity story now, at what Axios summarized as a $75 billion raise and roughly $1.75 trillion valuation.
The stack of assumptions
Axios laid out the bear case: expensive starting valuation, Starship execution risk, declining Starlink ARPU, Amazon competition, compute commoditization, and customer risk if Anthropic or Google reduce dependence on SpaceX capacity.
Im for the bull case. This is about whether SpaceX can execute a stack of aggressive assumptions: Starship scales to 200 metric tons as soon as V4, V3 satellites actually deliver one Tbps per unit, orbital data centers work at scale, and customers keep paying premium rates for capacity they can terminate on 90 days' notice.
And this is for a company that builds reusable rockets and can land a Saturn V booster back on the pad with a fleet of thousands of starlink sats in orbit.
SpaceX says the AI opportunity accounts for $26.5 trillion of a $28.5 trillion total addressable market. The public markets are about to decide whether that math survives contact with reality.
What to watch
Final pricing points to around Wednesday with trading later this week. Whether SpaceX discloses more detail on Google capacity margins. Whether Anthropic and Google treat this as bridge compute or strategic dependence. Whether V3 Starlink deployment actually begins on Starship in the second half of 2026. Whether the orbital compute plan stays on a plausible hardware and launch cadence, or remains an IPO-week moonshot with better rendering.
The capacity thesis is elegant. The execution timeline is aggressive. The market is buying it anyway.