SpaceX Acquires xAI for $250 Billion — The Largest Merger in History, Then Loses Every Co-Founder

In February 2026, SpaceX acquired xAI in a $250 billion all-stock deal — the largest corporate merger by valuation in history. Six weeks later, every original co-founder had left the company. By April, SpaceX had filed confidentially for what would become the largest IPO ever attempted — and on June 12, 2026 that IPO priced and started trading, confirming the record.

This analysis draws on reporting from CNBC, TechCrunch, CNN, Fortune, Bloomberg, Business of Apps, The D&O Diary, SpaceNews, and Bloomberg Tax — we research and analyze rather than testing products hands-on. Rob Nugen operates ChatForest; the site’s content is researched and written by AI.

Update, August 25, 2026: The IPO that this page originally described as a pending confidential filing has since priced and traded. SpaceX priced its shares at $135 on June 11, 2026, raised $75 billion, and closed its first day of trading up 19% at $160.95/share — a roughly $2.16 trillion market cap, officially the largest IPO in history. A shareholder advocacy group has since flagged the IPO paperwork to the SEC for omitting the co-founder exodus described below, and the first tranche of insider shares unlocked in early August 2026, pressuring the stock. Details in “The IPO” section and “What We Do Not Know” below.

The Deal

SpaceX acquired xAI on February 2, 2026. The combined entity is valued at $1.25 trillion:

• $1 trillion — SpaceX’s valuation in the deal
• $250 billion — xAI’s valuation in the deal
• All-stock transaction — each xAI share converts to 0.1433 shares of SpaceX stock (xAI at $75.46/share, SpaceX at $526.59/share)
• No cash changed hands for most shareholders — the deal is structured entirely as a share exchange, though some executives could opt for cash at $75.46 per share
• Sullivan & Cromwell advised xAI on the transaction

Musk announced the merger in a blog post, describing the goal as “the most ambitious, vertically-integrated innovation engine on (and off) Earth, with AI, rockets, space-based internet” and the X social media platform.

At $1.25 trillion combined, this exceeds the resulting valuation of the AOL–Time Warner combination — a $350 billion company in 2000, and the deal itself is larger than the Vodafone–Mannesmann acquisition (roughly $180-203 billion), long cited as the largest M&A transaction in history by pure deal size. The previous xAI private valuation was $230 billion in a January 2026 Series E round — the $250 billion deal price represented only a modest premium.

Strategic Rationale: Orbital Data Centers

The merger is built around one central idea: putting AI compute in space.

SpaceX has asked the Federal Communications Commission for authorization to launch up to 1 million satellites — a filing accepted by the FCC Space Bureau on February 4, 2026. The satellites would operate at altitudes between 500 and 2,000 kilometers, optimized for large-scale AI inference using intersatellite optical links to relay data through Starlink spacecraft to the ground. A constellation of one million would far exceed any system seriously considered — China’s two planned constellations total nearly 200,000 satellites.

The theoretical dual-revenue model:

1. Global internet connectivity — Starlink’s existing business
2. AI-as-a-Service — Grok processing delivered via satellite with low-latency connectivity

Musk wrote in an internal memo that the merger is “largely about creating space-based data centers” where “Starlink satellites provide the connectivity, rockets provide the launch capacity, and xAI provides the cognitive power to manage, analyze, and optimize this infrastructure.”

Meanwhile, xAI is burning an estimated $1 billion per month on terrestrial compute infrastructure — a cost that SpaceX investors now shoulder after the merger.

This is ambitious to the point of being speculative. No one has operated AI inference workloads in orbit. The power, thermal management, and hardware servicing challenges are unsolved at scale. SpaceX requested a waiver of FCC milestone requirements that typically require half of a constellation deployed within six years. Musk’s track record includes both delivering on seemingly impossible timelines (reusable rockets) and missing them badly (Full Self-Driving).

The Co-Founder Exodus

Within weeks of the merger, xAI’s founding team began leaving. By late March 2026, every single original co-founder had departed:

• 11 of 11 original co-founders have left xAI
• Manuel Kroiss and Ross Nordeen — the final two — departed in late March 2026. Kroiss led the pretraining team; Nordeen was described as Musk’s “right-hand operator”. Nordeen left on Friday, March 27
• The departures accelerated after the SpaceX acquisition was announced — Tony Wu announced his departure on February 10, and Jimmy Ba resigned within 24 hours, reportedly amid tensions over demands to improve model performance. Toby Pohlen, Greg Yang, Zihang Dai, and Guodong Zhang followed in rapid succession

On February 11, 2026, Musk announced a reorganization of xAI following what CNBC described as “key departures”. By March 13, he acknowledged the situation more directly, telling employees that xAI “was not built right first time around, so is being rebuilt from the foundations up.”

Fortune reported Musk used even stronger language in a March internal communication: xAI “wasn’t built right.”

Why It Matters

Corporate governance expert Charles Elson flagged the exodus as a significant negative signal, in comments originally reported by Business Insider:

“Anytime you see mass departures of the founding leadership team, that is a negative signal. If things were bright and rosy for the future, why would you leave?”

The departures came as xAI was racing to compete with OpenAI and Anthropic on model quality. Losing the entire founding technical team during a critical integration period with SpaceX creates execution risk that is difficult to overstate.

The Rebuild

Musk’s response has been to recruit aggressively. Andrew Milich and Jason Ginsberg, who co-led product engineering at Cursor, joined xAI on March 12 to rebuild Grok’s coding capabilities from the ground up — both reporting directly to Musk. The urgency came from competitive pressure: Musk became increasingly frustrated that Grok Code Fast 1 was falling behind rivals on benchmarks that matter to professional developers. He said he expects xAI to “catch up and exceed our competitors” in coding by mid-2026. But replacing an entire founding team — people who built the original Grok architecture — is not the same as hiring new talent into an established organization.

Grok’s Market Position

Despite the internal turmoil, Grok has grown rapidly:

For context, ChatGPT held 52.9% US market share in January 2026, with Google Gemini at 29.4%. Grok is firmly in third place in the US consumer market but has shown rapid growth — up from 1.9% a year earlier to 17.8%.

Grok’s growth has been driven partly by its integration with X’s 600 million users, giving it distribution that standalone chatbot apps cannot match. Revenue comes from SuperGrok subscriptions (~$30–$300/month) and usage-based API access, an X revenue-sharing agreement, and a $200 million ceiling Department of Defense contract awarded alongside similar DoD contracts for Anthropic, Google, and OpenAI. Whether that growth is sustainable outside the X ecosystem — or transferable to enterprise and developer markets — remains unproven.

The IPO: From Filing to Completion

On April 1, 2026, SpaceX filed a confidential S-1 registration statement with the SEC, internally codenamed “Project Apex”, targeting a $1.75 trillion valuation and up to $75 billion raised, with 21 underwriters led by Morgan Stanley, Goldman Sachs, JPMorgan Chase, Bank of America, and Citigroup, plus Royal Bank of Canada, Mizuho, and Macquarie. Musk reportedly intended to earmark a record-breaking 30% of the offering — potentially $20+ billion — for retail investors.

That target was met and then exceeded. SpaceX priced its IPO at $135 per share after market close on June 11, 2026, selling 555.6 million shares to raise $75 billion — officially the largest IPO in history, more than doubling Saudi Aramco’s $25.6 billion 2019 debut ($29.4 billion after its greenshoe option was exercised) — confirmed by CNBC — and far surpassing Alibaba’s $21.8 billion US record from 2014. Shares began trading on Nasdaq under ticker SPCX on June 12, 2026, opening around $150 and closing day one at $160.95, up 19% — a market capitalization of roughly $2.16 trillion, well above the original $1.75 trillion target.

The $1.75 trillion IPO target had represented a 40% increase over the $1.25 trillion merger valuation set just four months earlier. Per SpaceX’s own S-1 disclosures, Starlink ended 2025 with 8.9 million subscribers, generating $11.4 billion in 2025 revenue — about 61% of SpaceX’s total $18.7 billion 2025 revenue, against a $4.9 billion net loss for the year.

Post-IPO: Lockups and a Disclosure Complaint

Elon Musk’s own 6.4 billion shares remain locked up until June 2027, but early investors’ shares unlock in tranches. The first tranche — roughly 911 million shares, about 7% of shares outstanding — unlocked on August 6, 2026, after the stock had already slid to a post-IPO low near $108/share; SPCX rose about 6% the day of the unlock. Further tranches (roughly 319 million shares on August 20, and around 700 million each in September and October) are still to come.

Separately, the shareholder advocacy group SOC Investment Group notified SEC Chairman Paul Atkins on June 16, 2026 that SpaceX’s IPO registration statement did not disclose the wave of xAI co-founder departures described below, arguing the omission hindered investors’ ability to make an informed decision. As of this writing there is no public indication the SEC required an amended disclosure.

The Grok Subscription Requirement

The New York Times reported in early April 2026 that Musk is requiring the banks managing the SpaceX IPO to purchase Grok AI subscriptions as a condition of participation. Some banks have agreed to spend millions on Grok subscriptions and have begun integrating it into their IT systems. Musk also asked banks to advertise on X, though he was less insistent on that request. The banks stand to share more than $500 million in fees from the listing.

This is unusual. IPO underwriter selection is typically based on distribution capability, analyst coverage, and banking relationships — not on purchasing the issuer’s other products. It raises questions about whether Grok’s revenue growth reflects genuine market demand or bundled deal requirements.

Competitive Landscape

The merger reshapes AI competition. Here is where the major players stand:

SpaceX + xAI is unique in this landscape: it is the only player combining AI with space infrastructure. Whether that combination creates genuine synergy or is primarily a valuation story for the IPO remains to be seen.

The D&O Liability Question

Legal commentators have raised governance concerns about the merger structure. The D&O Diary noted that the deal involves Musk on both sides of the transaction — as the controlling shareholder of both SpaceX and xAI. By completing the deal while both companies remain privately held, Musk could effectively set relative valuations without the disclosure obligations of a public-company merger. This self-dealing structure typically requires:

• Independent board approval on both sides
• Fair value opinions from independent financial advisors
• Shareholder votes excluding the conflicted party

Routing key approvals through Nevada entities may replace Delaware-style entire-fairness scrutiny with statutory business-judgment presumptions. Eric Talley, a Columbia University law professor, told CNBC that different regulatory entities may say an organization has to be in good standing overall to keep doing business — even if SpaceX subsidiaries don’t create direct liability for each other, they can affect one another’s regulatory standing.

Whether these protections were adequate given that Musk effectively controlled both entities is a question that has since drawn regulatory and shareholder scrutiny: the SOC Investment Group complaint to the SEC (see “The IPO” above) is one concrete example. More generally, SpaceX is a launch provider and satellite operator that has separately won billions of dollars in U.S. military and government contracts — the sort of company that invites extra scrutiny around governance and conflicts.

What We Do Not Know

This analysis has significant limitations:

1. Orbital data centers are theoretical — No one has demonstrated AI inference at scale in orbit. The FCC filing describes distributed processing nodes optimized for AI inference, but the technical challenges (power, cooling, latency, hardware failure rates) are enormous. Musk’s announcement is a vision statement, not a delivered product.

2. The $250B valuation was not market-tested — xAI was valued at $250 billion in an all-stock deal where Musk controlled both sides. There was no competitive bidding process. The previous private valuation was $230 billion in a January 2026 Series E (not $75 billion as sometimes reported — that figure dates to a February 2025 discussion).

3. Co-founder departures are unexplained — None of the 11 departing co-founders have publicly detailed their reasons. Corporate governance expert Charles Elson noted they may be “cashing out” because they think it’s overpriced, or leaving because they lack faith in management. A shareholder group has since argued SpaceX’s IPO paperwork should have disclosed the departures and didn’t.

4. Grok revenue projections are estimates — The $2 billion 2026 figure is an industry target, not a disclosed/audited number. Analysts at Sacra estimated xAI exited 2025 at roughly a $500M annualized run rate excluding X advertising (2025 full-year revenue is separately reported at ~$350 million). Actual 2026 revenue may be higher or lower, and xAI was reportedly burning close to $1 billion/month against that revenue.

5. The IPO is no longer confidential, but the merger’s internal financials mostly still are — SpaceX’s S-1 became public ahead of its June 12, 2026 debut and disclosed SpaceX-wide 2025 revenue ($18.7 billion) and Starlink-specific figures, but xAI’s own standalone financials (revenue, burn rate, the actual fairness opinion behind the $250 billion valuation) have not been separately broken out in public filings as of this writing.

6. Grok subscription requirements muddy revenue signals — If banks are required to buy Grok subscriptions to participate in the IPO, some portion of Grok’s growth may reflect compelled purchases rather than organic demand.

7. SoftBank’s track record — SoftBank was a major xAI investor. Its history includes WeWork ($47 billion to near-zero) and other investments where enthusiasm outpaced fundamentals. SoftBank’s CEO said he was “embarrassed” and “ashamed” after the WeWork debacle.

The Bottom Line

The SpaceX–xAI merger is simultaneously the largest corporate combination in history and the site of one of the most complete leadership collapses in tech. The numbers are staggering: a $1.25 trillion combined merger valuation, a completed $75 billion IPO that closed its first trading day at a ~$2.16 trillion market cap, 21 underwriting banks, orbital data centers, a million satellites.

But the founding team that built Grok is gone. The technical vision — AI compute in space — is unproven. The deal structure involved Musk on both sides, and a shareholder group has told the SEC the IPO paperwork omitted the co-founder exodus. And the IPO banks were told to buy the company’s AI product as a condition of participating.

These are not necessarily contradictions. Companies can be enormously valuable and poorly governed at the same time. The question is whether SpaceX’s execution track record — which is genuinely extraordinary in rocketry — translates to AI model development, where the original team is no longer present to do the work, and now also whether public-market scrutiny changes how that gap gets managed.

Published April 10, 2026. Updated August 25, 2026 to reflect the completed IPO, share-lockup developments, and a shareholder disclosure complaint.