X Corp
| X Corp. | |
|---|---|
| Type | Former corporation; now a brand within SpaceXAI |
| Industry | Social media, technology |
| Founded | March 2023, as successor to Twitter, Inc. |
| Founder | Elon Musk |
| Headquarters | Bastrop, Texas, United States |
| Key people | Elon Musk |
| Products | X (social media platform) |
| Parent | SpaceXAI, a subsidiary of SpaceX |
X Corp. was an American technology company headquartered in Bastrop, Texas. It was established by Elon Musk in March 2023 as the corporate successor to Twitter, Inc., the company that had operated the social media platform Twitter since 2007. It became a wholly owned subsidiary of xAI on 28 March 2025, and following SpaceX's acquisition of xAI in February 2026 it ceased to exist as a standalone company. SpaceX now manages X and xAI as products within its subsidiary SpaceXAI, retaining X Corp. as a brand name and marketing header.
The entity's three-year existence encompassed one of the most closely watched corporate episodes of the decade: the renaming and restructuring of one of the world's best-known consumer internet platforms, a collapse and partial recovery in its valuation, a substantial reduction in its workforce, a sustained dispute with advertisers and with regulators in several countries, and finally its absorption into an artificial intelligence company and then into a rocket manufacturer.
Background
Twitter was launched in 2006 and incorporated as Twitter, Inc. in 2007. It became one of the principal venues for public conversation in the United States and in a number of other countries, disproportionately used by journalists, politicians, academics and others whose work involves public communication, which gave it an influence far larger than its user numbers alone would suggest. It was never notably profitable, reporting losses in most years of its existence as a public company after its 2013 listing.
Elon Musk agreed to acquire Twitter in April 2022 for US$44 billion, at US$54.20 a share. He then sought to withdraw, alleging that the company had misrepresented the proportion of accounts that were automated or fake. Twitter sued to enforce the agreement in the Delaware Court of Chancery, and days before trial Musk agreed to proceed on the original terms. The acquisition closed on 27 October 2022, financed with approximately US$13 billion of debt placed on the company itself, sales of Tesla shares, and equity from co-investors.
History
Formation and restructuring, 2022 to 2023
Musk dismissed the existing senior management on the day the acquisition closed and reduced the workforce from roughly 7,500 to a small fraction of that number within months, through dismissals and resignations. The stated reasoning was that the company had been substantially overstaffed and that the debt service required a far lower cost base.
In March 2023 Twitter, Inc. was merged into X Corp., a Nevada entity, which was itself held by X Holdings Corp. The name change reflected Musk's long-stated ambition, dating to his involvement with the payments company X.com that became PayPal in 2000, to create an application combining communication, payments and commerce of the kind that WeChat provides in China.
Linda Yaccarino, previously an advertising executive at NBCUniversal, was appointed chief executive in June 2023, with Musk retaining the roles of executive chairman and chief technology officer. In July 2023 the Twitter name and the bird logo were retired and the platform was rebranded as X, a decision widely criticised on the ground that the Twitter brand and the verb it had generated were among the company's most valuable assets.
Valuation and the advertising dispute, 2023 to 2024
The company's value fell sharply after the acquisition. Fidelity Investments, which held a stake and marked it periodically, estimated the company at about US$15 billion at the end of May 2023, roughly a third of the acquisition price. The estimate rose to about US$27 billion by July 2023 and about US$28.5 billion by the end of August.
The principal cause of the decline was advertising. Major advertisers reduced or suspended spending following changes to content moderation, concerns about the placement of advertisements beside objectionable material, and, in November 2023, a public controversy over a post by Musk himself which several large advertisers cited in withdrawing. Musk's response, delivered at a public interview and addressed directly to the advertisers concerned, was widely reported and did not improve the position.
In August 2024 X filed suit against the Global Alliance for Responsible Media, an advertising industry initiative on brand safety, alleging that it had conspired with members to withhold advertising revenue collectively. The named companies included CVS, Unilever, Mars and Ørsted. The alliance suspended its operations shortly afterwards, stating that it lacked the resources to defend the litigation, an outcome its critics described as the effective end of industry-wide brand safety coordination and its defenders described as the removal of an unlawful boycott.
Absorption into xAI and SpaceX, 2025 to 2026
On 1 January 2025 X Corp. registered to do business in the State of Texas under the assumed name X Internet Corp., designating CT Corporation System as its registered agent in filings with the Texas Secretary of State.
In February 2025 Musk was reported to be in discussions over a financing round at a valuation of US$44 billion, returning the company to the price paid for Twitter in 2022.
On 28 March 2025 Musk announced that xAI, the artificial intelligence company he had founded in 2023, had acquired X. The transaction was entirely in stock and valued X at US$33 billion, or US$45 billion including approximately US$12 billion of debt. xAI itself was valued at US$80 billion. The transaction moved the social media platform into common ownership with the model developer whose systems it already hosted, and whose training had drawn on the platform's content.
On 9 July 2025 Linda Yaccarino announced that she was stepping down after two years as chief executive.
In February 2026 SpaceX acquired xAI. X Corp. thereby ceased to exist as a standalone company. SpaceX now manages X and xAI as products within its subsidiary SpaceXAI, with X Corp. retained as a brand name and marketing header rather than as an operating entity.
Regulatory and legal matters
X and its predecessor have been the subject of regulatory action in several jurisdictions, principally over content moderation, transparency and data protection.
In Australia, the eSafety Commissioner issued a transparency notice in 2023 requiring information about the company's handling of child sexual exploitation material. The company failed to comply fully and was fined. In 2026 the Federal Court of Australia upheld the penalty after X Corp. admitted the failure, a judgment of some significance because it established that a corporate successor remains answerable for the obligations of the entity it replaced, an argument the company had contested on the ground that the notice had been addressed to Twitter, Inc.
In the European Union, the platform has been subject to proceedings under the Digital Services Act concerning the handling of illegal content, the design of its verification system and access to data for researchers. In Brazil, the platform was suspended nationally for several weeks in 2024 following a dispute between Musk and a justice of the Supreme Federal Court over the removal of accounts and the appointment of a legal representative, and was restored after the company complied.
The company has also been a plaintiff in a number of actions, including the suit against the Global Alliance for Responsible Media and proceedings against research organisations that published analyses of content on the platform, the latter dismissed in 2024 with the court observing that the litigation appeared intended to punish criticism.
The platform
Products and features
The X platform allows users to publish short posts, historically limited to 140 and later 280 characters with longer limits for paying subscribers, and to repost, reply to and quote the posts of others. The conventions that grew up around Twitter, the hashtag, the at-mention, the retweet and the thread, were in several cases invented by users and subsequently adopted by the company, which is unusual among consumer platforms and was for years cited as evidence of an unusually generative relationship with its users.
Changes made after 2022 were extensive. Verification, previously granted without charge to accounts whose identity the company had confirmed and which it judged notable, was replaced by a paid subscription, X Premium, which confers the same visual marker along with longer posts, editing, reduced advertising and preferential ranking in replies. The change was defended as democratising a status symbol and criticised on the ground that a marker previously signifying verified identity now signified payment, which made impersonation easier rather than harder; several widely reported incidents involving fake accounts of listed companies followed within days of the launch.
The recommendation algorithm governing the default timeline was published in part as open source in 2023, an unusual step, and was subsequently altered in ways that increased the prominence of subscribing accounts.
Community Notes, a crowd-sourced fact-checking system inherited from Twitter's Birdwatch programme, was expanded substantially and is among the few features of the period to attract broad approval. Its distinguishing design is that a note is displayed only when it is rated helpful by contributors who have historically disagreed with one another, which makes it resistant to capture by any single faction. Several other platforms subsequently adopted variants of the approach.
Grok, the conversational artificial intelligence system developed by xAI, was integrated into the platform from 2023 and given access to real-time posts, which was the clearest early expression of the rationale for combining the two businesses.
Other additions included long-form articles, video hosting and monetisation for creators, audio and video calling, and job listings, each an element of the everything-application ambition.
Content moderation
The most consequential changes concerned moderation. The trust and safety organisation was reduced substantially, a large number of previously suspended accounts were reinstated, and the standard applied was restated as freedom of speech but not freedom of reach, under which material that is lawful but violates policy would be restricted in distribution rather than removed.
Assessments of the result have differed sharply and the evidence is contested. Researchers publishing analyses of hate speech and of coordinated inauthentic behaviour on the platform reported increases; the company disputed the methodology and in several cases sued. Independent verification became harder after access to the research application programming interface, previously free for academic use, was restricted and then priced, a change that materially reduced the volume of published research on the platform and which regulators in the European Union have raised under the Digital Services Act.
Users and competitors
The platform retains a very large global user base, and its role in the distribution of breaking news, in political communication and in specialist professional conversation remains substantial. It has nonetheless lost a meaningful share of particular communities, notably academic, scientific and journalistic users, a number of whom moved to Bluesky, which uses a decentralised protocol and grew rapidly from 2024, to Meta's Threads, launched in July 2023 and built on the Instagram user base, or to Mastodon, a federated network with no central owner.
The dispersal is itself significant. For roughly fifteen years a single service functioned as the default venue for real-time public conversation in much of the English-speaking world, and the principal consequence of the period from 2022 is that no service now does.
Assessment
X Corp. existed for three years and was, for most of that time, a holding structure for a single product undergoing an unusually public transformation.
The commercial judgement on the period is reasonably clear. A platform acquired for US$44 billion was valued by an independent holder at around a third of that within eight months, principally because advertisers, who supplied almost all of its revenue, reduced their spending. The recovery in reported valuation through 2024 and 2025, culminating in the US$33 billion equity value ascribed in the xAI transaction, occurred in transactions among entities controlled by the same person, which limits what can be inferred from them.
The strategic judgement is harder and not yet available. The stated purpose of the acquisition was never solely to run a social network: it was to build an everything application, and later to secure a large corpus of real-time human conversation for training artificial intelligence models. The second of these became the operative rationale, and the sequence of transactions in 2025 and 2026, folding the platform into a model developer and then into a rocket company, can be read either as the assembly of a vertically integrated technology group or as the repeated refinancing of an asset whose standalone economics had not recovered.
What is not in doubt is the effect on the platform itself. Its character, its user composition and its role in public discussion changed substantially between 2022 and 2026, competitors including Bluesky, Threads and Mastodon acquired significant user bases from people who left, and a service that had functioned for fifteen years as something close to a public utility for news became a considerably more contested space.
Timeline
- 2006 Twitter launched; incorporated as Twitter, Inc. in 2007.
- 2013 Twitter lists on the New York Stock Exchange.
- 2022 Elon Musk agrees to acquire Twitter in April for US$44 billion, attempts to withdraw, and completes the acquisition on 27 October; workforce reduced sharply.
- 2023 Twitter, Inc. merged into X Corp. in March; Linda Yaccarino appointed chief executive in June; platform rebranded as X in July; Australian transparency notice issued; Fidelity valuations fall to about US$15 billion in May before rising through the year.
- 2024 Suit filed in August against the Global Alliance for Responsible Media, which suspends operations; national suspension in Brazil for several weeks.
- 2025 Registration in Texas as X Internet Corp. on 1 January; financing discussions reported in February at a US$44 billion valuation; xAI acquires X on 28 March in an all-stock transaction valuing it at US$33 billion, or US$45 billion including debt; Yaccarino steps down on 9 July.
- 2026 SpaceX acquires xAI in February; X Corp. ceases to exist as a standalone company and is retained as a brand within SpaceXAI; Federal Court of Australia upholds the regulatory fine after the company admits non-compliance.