X

On April 4, Twitter, Inc. disclosed that it had merged into X Corp.⁠[3]

In May 2023, Linda YaccarinoLinda YaccarinoLinda Yaccarino is an American media and advertising executive who served as chief executive officer of the social platform X (formerly Twitter) from June 2023 to July 2025. Before that she led advertising sales at NBCUniversal for more than a decade; her tenure at X saw an advertiser exodus, brand-safety controversies and lawsuits against advertising-industry groups. After leaving X, she became chief executive officer of the telehealth company eMed Population Health in August 2025.Open the full entry was appointed chief executive officer of the platform, responsible for business operations; Elon Musk moved to the roles of executive chairman and chief technology officer.⁠[4]

On July 24, 2023, the platform adopted the X brand, continuing the original Twitter public conversation service and developing video, long-form writing, and creator monetization features.⁠[5]

On August 30, 2024, a Brazilian court suspended X’s service because X had not designated a local legal representative. The company subsequently blocked the specified accounts, paid its fines in full, and appointed a representative. On October 8, the judge authorized lifting the suspension; from October 9, internet service providers restored access.⁠[6]

In March 2025, X merged with xAI. After the merger, Elon Musk served as chief executive officer and a director of xAI.⁠[7]

On July 9, 2025, Yaccarino announced that she was stepping down as chief executive officer. In her statement, she looked back on her two years working with Elon Musk and thanked the team for its work on transforming the platform.⁠[4]

On December 5, 2025, the European Commission fined X €120 million under the Digital Services Act, finding that the design of its blue checkmark was deceptive, that its advertising repository lacked sufficient transparency, and that researchers’ access to public data was improperly restricted. This was the first non-compliance decision under the act.⁠[8]

On January 12, 2026, the UK’s Ofcom opened a formal investigation into X, examining whether the platform had adequately assessed and mitigated the risk of the spread of non-consensual sexual imagery generated by Grok and dealt with such content promptly. On February 3, the regulator said it was still gathering evidence; X said it had taken preventive measures.⁠[9]

On January 26, the European Commission separately opened an investigation into Grok and X’s recommender systems.⁠[10]

On February 2, 2026, xAI announced that SpaceXSpaceXSpaceX is a company founded by Elon Musk in 2002 whose businesses include space transportation, Starlink satellite communications and artificial intelligence. It went public in 2026 under the ticker SPCX.Open the full entry had acquired xAI; X, through its earlier merger with xAI, thereby became part of the SpaceX group.⁠[11][7]

On February 16, X and others filed suit challenging the penalty; the case was still pending at the end of June.⁠[12]

On July 15, 2026, the European Commission accepted X’s remediation plan. The measures include improving the advertising repository’s search, responsiveness, and disclosures, providing API access, and opening public data free of charge to eligible researchers. X was given six months to implement the measures, after which it must undergo an independent external audit, and it is subject to enhanced supervision.⁠[13]

On August 5, 2026, Nikita BierNikita BierNikita Bier is an American entrepreneur and product manager known for developing tbh and Gas, anonymous compliment-polling apps for teenagers, which were acquired by Facebook, Inc. (now Meta) and Discord in 2017 and 2023, respectively. He announced on June 30, 2025, that he had become head of product at the social media platform X, stepped down in August 2026, and said in October of that year that he had officially left X.Open the full entry announced that he would no longer lead product at X and would remain an advisor. He said that over roughly the past 400 days the team had rebuilt features including the timeline, the Android app, notifications, and chat, and that he was handing over to the subsequent product, design, and engineering teams.⁠[14]

On September 24, 2026, the U.S. Department of Justice announced that it had applied to the General Court of the European Union to intervene in two cases, X Internet and X Holdings v. Commission (T-114/26) and Musk v. Commission (T-121/26), in support of annulling the European Commission’s December 5, 2025, decision under the Digital Services Act imposing a fine of €120 million jointly and severally. Assistant Attorney General Brett A. Shumate of the Justice Department’s Civil Division said the European Commission had inappropriately expanded its regulatory authority in attempting to reach American companies not present or operating within its jurisdiction; the department also objected to the Commission’s inclusion of Musk personally and other American companies under his ownership in its findings of liability, and said the application had been prepared in coordination with the Department of State. The department said this was the first case challenging an enforcement action under the Digital Services Act to reach the General Court.⁠[15][15][15][15][15][15]

On September 25, European Commission spokesperson Thomas Regnier said the Commission was enforcing the law objectively and with solid evidence, and was ready to defend the penalty decision in court. Whether to accept the U.S. intervention application is for the court to decide.⁠[16][16][16][17]

X’s advertising products include vertical video, content sponsorships, and timeline and trending placements, and businesses can set audiences, budgets, and ad campaigns by geographic location. The platform also offers business subscriptions, which bring brand visibility, hiring, and market intelligence tools into its commercial services.⁠[1]

Individual subscriptions are divided into Basic, Premium, and Premium+. Paid features include editing posts, long-form posts and long videos, varying degrees of ad reduction, and Grok usage allowances; eligible creators can also take part in content incentives and subscription revenue features.⁠[2]

X’s published rules prohibit violent threats, harassment, hateful conduct, non-consensual intimate media, impersonation, and harmful manipulated content, and it has reporting and appeals procedures.⁠[18]

Community Notes lets participants add context to posts. Only notes rated helpful by contributors with differing perspectives are shown publicly; its algorithm and data are open, and the platform states that notes do not represent the company’s position and that posts with notes are not automatically removed as a result.⁠[19]

X: Platform entry point and company information; Official website: https://x.com/ (opens in a new window); Official link: https://about.x.com/en (opens in a new window).⁠[20]

X: Business products and advertising; Official website: https://business.x.com/en (opens in a new window).⁠[1]

X: Official X profile; Official account: https://x.com/X (opens in a new window).⁠[21]

X: LinkedInLinkedInLinkedIn is a social networking platform for professionals. It was founded in 2002 by Reid Hoffman and others, launched in 2003, and listed on the New York Stock Exchange in 2011; after Microsoft acquired it for approximately $26.2 billion in 2016, it became a wholly owned Microsoft subsidiary. Its revenue comes from membership subscriptions, advertising, and recruitment solutions.Open the full entry company page; Official account: https://www.linkedin.com/company/x-corp/ (opens in a new window).⁠[22]

X: Main YouTubeYouTubeYouTube is Google’s video-sharing and creator platform, founded in 2005 by Steve Chen, Chad Hurley, and Jawed Karim and acquired by Google in 2006. Built around video uploading, viewing, and creator earnings, the platform has developed Shorts, YouTube Music, Premium, YouTube TV, and products for children, and is headquartered in San Bruno, California, United States.Open the full entry channel; Official account: https://www.youtube.com/@X.com (opens in a new window).⁠[23][24]