SpaceX owns xAI. SpaceX acquired xAI in an all-stock deal announced on February 2, 2026, which made xAI a wholly owned subsidiary, with xAI valued at about $250 billion and the combined company at about $1.25 trillion. xAI in turn owns the Grok chatbot and the social network X. SpaceX has traded on Nasdaq as SPCX since June 12, 2026, and Elon Musk holds roughly 42% of its equity and about 82% of its votes.
Part of EPR's Technology coverage. Originally published and updated November 30, 2026. For xAI's chatbot rivals, see who owns OpenAI and who owns Anthropic.
Who owns xAI today?
xAI is owned by SpaceX, and SpaceX is a public company controlled by Elon Musk through super-voting shares. The table traces the chain from xAI up to the people who vote the shares, using SpaceX's IPO filings as reported by CNBC and summarized in Wikipedia's SpaceX IPO article.
| Layer | Owner | Detail |
|---|
| xAI, Grok and X | SpaceX (100%) | Wholly owned subsidiary since the February 2, 2026 merger |
| SpaceX (Nasdaq: SPCX) | Public Class A shareholders and insiders | Listed June 12, 2026 at $135 a share, raising $75 billion at pricing |
| SpaceX control | Elon Musk | About 42% of equity and 82.4% of voting power through Class B shares at ten votes each |
Before the IPO, CNBC reported from the prospectus that no person or entity other than Musk held more than 5% of SpaceX. Antonio Gracias, CEO of Valor Equity Partners and a SpaceX board member, held 7.3% of Class A shares, according to the same report.
How did SpaceX come to own xAI?
SpaceX came to own xAI through three deals in 14 months, according to SpaceX's S-1/A and press coverage: xAI bought X in March 2025, raised new capital in January 2026, and was then folded into SpaceX in February 2026. The steps run in this order.
- 2023: Musk founded xAI, and the Grok chatbot launched in November 2023 for X Premium Plus subscribers.
- March 28, 2025: xAI completed its acquisition of X Holdings, which SpaceX's S-1/A later disclosed.
- January 2026: xAI raised a Series E of about $20 billion, above its $15 billion target, according to reporting on SpaceX's filings.
- February 2, 2026: SpaceX acquired xAI in an all-stock deal, per Reuters and Bloomberg coverage.
- May 20, 2026: SpaceX filed its S-1 for a Nasdaq listing, and the stock debuted on June 12, 2026.
The xAI acquisition was reported as the largest merger on record when it was announced, according to press coverage at the time.
What did xAI's shareholders receive in the SpaceX deal?
xAI's shareholders became SpaceX shareholders. Under the merger terms described in SpaceX's S-1/A, xAI's convertible preferred stock converted into SpaceX common stock on the effective date, and xAI common stock converted at a fixed exchange ratio. Reuters reported that ratio as 0.1433 SpaceX shares per xAI share.
The Series E investors named in the filing summaries included Valor Equity Partners, StepStone, Fidelity, the Qatar Investment Authority, MGX and Baron, with Nvidia and Cisco as strategic investors, per Penchan Research. Those holders now own SpaceX stock rather than a separate xAI stake. The filings do not itemize each investor's dollar amount, so no ranking of xAI's largest investors is reliable.
Who controls SpaceX, and therefore xAI?
Elon Musk controls SpaceX, and through it xAI, because his Class B shares carry ten votes each while the Class A shares sold in the IPO carry one. Musk held 82.4% of voting power after the offering, according to SpaceX's S-1/A as reported by The Motley Fool and CNBC. Investors who bought Class A shares in the IPO have economic exposure but little influence over shareholder votes.
Musk and other insiders agreed not to sell for 366 days after the listing, per Wikipedia's summary of the prospectus, and other pre-IPO investors have a 180-day lock-up that releases in stages. EPR's SpaceX lock-up calendar lists each unlock date.
Who are xAI's biggest customers beyond X?
Anthropic and Google are the two largest outside buyers of xAI's computing capacity named in public reporting. Anthropic signed a contract on May 6, 2026 worth $1.25 billion a month for all the capacity at the Colossus 1 data center in Memphis, Tennessee, which has about 220,000 Nvidia GPUs, according to TechCrunch and Wired. Google signed a similar agreement on June 5, 2026 to pay $920 million a month for capacity covering roughly 110,000 Nvidia GPUs, according to Reuters and CNBC.
| Customer | Date signed | Monthly payment | Capacity |
|---|
| Anthropic | May 6, 2026 | $1.25 billion | All of Colossus 1, about 220,000 Nvidia GPUs |
| Google | June 5, 2026 | $920 million | About 110,000 Nvidia GPUs, data center not specified |
Both contracts carry 90-day termination clauses, according to Yahoo Finance reporting, so the revenue is contracted but not locked in for years. EPR's Anthropic ownership page covers the other side of the first deal.
What did the IPO change for xAI's financial disclosure?
SpaceX now reports xAI as its artificial intelligence segment, so xAI's results appear in a public company's SEC filings. The prospectus divided SpaceX into three segments: space launch, Starlink connectivity, and AI through xAI, according to Wikipedia's summary of the S-1. The same filing assigned about 90% of a $28.5 trillion total addressable market to AI, a figure that analysts including Aswath Damodaran and Morningstar have debated in published valuations. For communications teams, the practical change is that xAI statements about revenue, compute and customers now fall under securities disclosure rules.
How does xAI communicate and market Grok?
xAI markets Grok mainly through Elon Musk's own posts on X and through distribution partnerships, rather than through a named agency of record. No PR or advertising agency for xAI appears in the coverage EPR reviewed. The examples below are the channels that trade and technology press have documented.
| Channel | Example | Reported by |
|---|
| Founder posts on X | Musk announced the Grok 4.3 beta on April 17, 2026 and promised daily improvements | Basenor, citing Musk's post |
| Enterprise distribution | Grok models became available on Databricks' Agent Bricks during the 2026 Data + AI Summit | RuntimeWire, citing xAI's announcement |
| Platform integration | Grok answers questions inside X and powers features in Starlink customer support | Press coverage of the SpaceX merger |
| Safety and policy updates | X added restrictions on Grok image generation in January 2026 after public criticism | Business Chief |
The pattern is founder-led launches on X first, with traditional press coverage following. EPR's reading is that this gives xAI very fast announcement cycles and puts the weight on Musk's account for every product statement, which is EPR's analysis rather than an xAI statement. For practitioner detail, see EPR's guide to Grok for PR, its analysis of SpaceX public relations, and its profile of X as a communications platform.
How should communications teams describe xAI's ownership?
Communications teams should describe xAI as a subsidiary of the publicly traded SpaceX, which Elon Musk controls. Four wording rules keep copy accurate:
- Write "xAI, a SpaceX subsidiary" rather than "Musk's private AI startup," which stopped being accurate on February 2, 2026.
- Say that xAI owns X, and that SpaceX owns xAI, so X is two layers below the listed company.
- Attach a date to any SpaceX ownership percentage, since the 82.4% voting figure comes from the June 2026 IPO filings.
- Do not call xAI's investors "xAI shareholders" today. They hold SpaceX stock.
Readers comparing the labs can continue with the AI Labs Citation Share Index. The decision for a communications team is to treat SpaceX's SEC filings as the source for every xAI ownership claim and to date each figure.
