Elon Musk Merged His AI Company Into His Rocket Company. Now He's Taking Them Both Public.

At a glance: In February 2026, SpaceX acquired xAI — the company behind Grok — in an all-stock transaction valuing the combined entity at $1.25 trillion, the largest merger in history. On May 6, xAI was formally dissolved and its assets folded into a new internal SpaceX division called SpaceXAI. Three weeks later, SpaceX filed its S-1 targeting a $1.75 trillion valuation and $75 billion raise — which would be the largest initial public offering in capital markets history. The roadshow begins June 4. Pricing is June 11. The numbers behind the vision are complicated.

The logic of the SpaceX/xAI merger, as Elon Musk explained it in his announcement memo, is that the planet is running out of electricity.

Not literally. But terrestrial data centers — the kind that train and run large AI models — consume immense amounts of power and water. Global electricity demand for AI is growing faster than grids can expand. Musk’s argument: the only place with unlimited solar energy and unlimited space for compute infrastructure is orbit.

The pitch is audacious. It is also, on its face, coherent. And on February 2, 2026, Musk made it the rationale for what became the largest corporate merger in history.

The Merger: $1.25 Trillion

SpaceX acquired xAI in an all-stock transaction. SpaceX was valued at $1 trillion at the time of the deal; xAI, the company behind the Grok chatbot and which had acquired X Corp. (formerly Twitter) the previous year, was valued at $250 billion. Combined: $1.25 trillion.

The strategic logic went beyond electricity. Musk wrote that xAI needed SpaceX’s launch capacity to build “Project Celestia” — a constellation of up to one million specialized compute satellites in high-altitude, sun-synchronous orbits. Positioned to receive unfiltered solar energy, these satellites would function as a distributed orbital supercomputer. SpaceX’s orbital solar arrays, Musk claimed, could operate at up to eight times the efficiency of terrestrial equivalents.

It is, by any measure, one of the most ambitious technical proposals ever attached to a financial transaction.

The deal closed February 2. Within weeks, xAI’s internal structure began to change. The co-founders, already reduced in number after the 2025 X merger, continued to depart. By March 2026, only Ross Nordeen remained among the original co-founding team — and Nordeen left shortly after. Michael Nicolls, the vice president of SpaceX’s Starlink division, was installed as xAI’s president.

Musk, reflecting on xAI’s origins, said in a March interview that the original company had “not been built right” — a candid admission that the integration was as much a restructuring as an acquisition.

SpaceXAI: What It Is Now

On May 6, 2026, xAI ceased to exist as an independent entity. Grok and X — the social media platform — moved under a new internal SpaceX division called SpaceXAI. The name is simple, the scope is not.

SpaceXAI currently claims 117 million monthly active users across its integrated services. It operates the Grok AI assistant, the X platform, xAI’s data annotation infrastructure (previously one of its largest business units), and is building toward the orbital compute vision.

The immediate revenue picture, however, is more grounded. The AI unit — combining X and xAI — generated $818 million in Q1 2026. That is approximately one-third less than Twitter generated in the same quarter before Musk acquired it in 2022. Advertising revenue on X has not recovered. Grok subscriptions are growing but are not yet a material line item.

There is one significant offset: Anthropic has signed a compute agreement with SpaceX worth $1.25 billion per month, drawing on SpaceX’s Colossus and Colossus II GPU clusters in Memphis, Tennessee, through May 2029. That contract — which, pointedly, predates the Anthropic $900 billion funding round expected to close this week — provides a revenue floor that has nothing to do with Grok or X’s organic performance.

The S-1 SpaceX filed on May 20 disclosed a $4.94 billion loss absorbed from the xAI merger — a writedown of goodwill and integration costs that reflects the gap between what was paid and what was received. That number is embedded in the prospectus investors will read before deciding whether to participate in the June IPO.

The IPO: Largest in History (If It Lands)

SpaceX submitted its S-1 to the SEC on May 20, targeting a Nasdaq listing under the ticker SPCX. The numbers are staggering.

The offering targets a $1.75 trillion valuation. It aims to raise up to $75 billion — which would surpass Saudi Aramco’s 2019 IPO ($35.4 billion raised) as the largest initial public offering in capital markets history. The roadshow begins June 4. Pricing is scheduled for June 11. Trading is expected to begin June 12.

SpaceX’s core business — launch services, Starlink satellite internet, government contracts — has been one of the most commercially successful private space companies ever built. Starlink alone serves tens of millions of subscribers globally. The Falcon 9’s reusability economics transformed the launch market. Starship’s development continues with ambitions toward Mars.

The SpaceXAI division adds a different kind of pitch: not just rockets and satellites, but the infrastructure layer for the next generation of AI compute. The Colossus clusters. The Anthropic contract. The Celestia vision. All of it rolled into a single public equity story.

Whether public markets price that as a coherent vision or a complicated rollup will depend heavily on the roadshow. Institutional investors will scrutinize the AI unit’s underperformance relative to Twitter’s pre-Musk baseline, the $4.94 billion merger loss, and the speculative timeline for orbital data centers. They will also see the Anthropic compute contract, the Starlink revenue, and a launch manifest that no competitor currently matches.

What to Watch

The roadshow (June 4–11) will be Musk’s opportunity to explain how SpaceXAI fits into the SpaceX investment thesis. Questions about Grok’s monetization, X’s advertising recovery, and the Celestia timeline are likely to be prominent. Public investor presentations from Musk on AI and space tend to generate significant attention.

xAI generator lawsuit and infrastructure expansion. TechCrunch reported on May 20 that xAI is currently being sued over data center generator emissions while simultaneously purchasing an additional $2.8 billion in generators. It is a detail that illustrates the pace at which SpaceXAI is building ground-based infrastructure even as the orbital compute vision is promoted. The legal exposure is an S-1 risk factor worth watching.

The Anthropic relationship. The $1.25 billion per month compute agreement runs through May 2029. Anthropic is reportedly closing a $30 billion funding round at a $900 billion valuation this week. How the two companies’ relationship evolves — as SpaceX pursues its own AI ambitions under the SpaceXAI brand — is a structural tension in the deal.

Project Celestia timeline. No launch schedule, specific satellite specification, or deployment milestone has been publicly attached to the orbital supercomputer vision. It is currently a strategic narrative, not an engineering program with public milestones. Whether it translates into a credible S-1 disclosure or remains aspirational language matters significantly for how the offering is received.

The SpaceX IPO itself will be among the most closely watched market events of 2026. At $75 billion raised and a $1.75 trillion target valuation, it would be a referendum not just on SpaceX but on how public markets value the intersection of space infrastructure and AI.

The SpaceX/xAI merger is a bet that the next constraint on AI is power, the solution to that constraint is orbit, and the company best positioned to own both the launch capacity and the AI models is the same company. Musk has made large bets before and won. He has also structured complex financial transactions that looked different from the inside than from the outside.

SpaceXAI is a real entity now, with real employees, real revenue, and a real IPO on the calendar. The vision is ambitious. The financials are uneven. Public markets get to vote on June 12.

ChatForest covers AI tools, platforms, and industry developments. This article is based on published reporting and public disclosures as of May 2026.