2026-04-27lawsuit
Musk v. Altman — OpenAI nonprofit mission trial
Elon Musk's federal lawsuit against Sam Altman, Greg Brockman, OpenAI, and Microsoft reached trial in Oakland in April 2026. Musk argues OpenAI abandoned its founding nonprofit mission and seeks remedies aimed at OpenAI's charitable arm; OpenAI argues Musk knew about the commercial structure and is trying to handicap a rival to xAI.
Outcome: Trial underway as of May 8, 2026. The court confirmed jury selection for April 27 and testimony beginning no earlier than April 28; Reuters reported week-two testimony from former OpenAI executives and a damages request of roughly $150B to benefit the nonprofit arm.
Parties: Elon Musk · Sam Altman · Greg Brockman · OpenAI · Microsoft
2024-09-01regulatory
Brazil bans X — Supreme Court confrontation
Brazilian Supreme Court Justice Alexandre de Moraes ordered X to block certain accounts he deemed threats to democratic institutions, citing Brazil's electoral integrity laws. After X refused to comply and withdrew its legal representative from Brazil, Justice de Moraes ordered the complete suspension of X in Brazil in September 2024 — affecting approximately 22 million users. Musk publicly attacked Moraes on X, calling him a 'dictator' and 'corrupt.'
Outcome: X was blocked in Brazil for approximately 40 days. The platform's access was restored after X appointed a new legal representative and paid fines of approximately $5M. The confrontation became a global flashpoint over platform regulation versus national sovereignty.
Parties: X/Twitter · Elon Musk · Justice Alexandre de Moraes · Brazilian Supreme Court
2024-07-13other
Trump endorsement — progressive base backlash
Following the attempted assassination of Donald Trump at a Pennsylvania rally on July 13, 2024, Musk publicly endorsed Trump's presidential campaign on X — a major shift from his historically centrist or apolitical public stance. Musk committed $45M/month in personal PAC funding to a pro-Trump political operation and became one of the most visible surrogates of the 2024 campaign. The endorsement triggered widespread criticism from scientists, climate advocates, and former Tesla fans who had admired his EV work.
Outcome: Trump won the 2024 election. Musk was appointed to lead the 'Department of Government Efficiency' (DOGE), an advisory body focused on cutting federal spending. His political transformation and government role became defining storylines heading into 2025.
Parties: Elon Musk · Donald Trump · DOGE
2024-06-19other
Vivian Jenna Wilson — public estrangement
Musk's daughter Vivian Jenna Wilson (who transitioned and changed her name from Xavier) filed in 2022 to legally distance herself from her father. In a June 2024 interview and public statements, Vivian publicly described being estranged from Musk, citing her transition, his public statements about gender identity, and what she described as an emotionally absent relationship. Musk subsequently stated he had 'lost' his son to 'the woke mind virus' and blamed what he called trans activism.
Outcome: The estrangement remained public and unresolved. Vivian's statements drew significant media coverage and added a personal dimension to Musk's prominent anti-trans political positions.
Parties: Elon Musk · Vivian Jenna Wilson
2024-03-01feud
Don Lemon — X deal canceled after interview
Former CNN anchor Don Lemon announced a content deal with X in February 2024. Before the show launched, Lemon interviewed Musk — asking pointed questions about his reported ketamine use, the ban of content in Brazil, and allegations of antisemitism on the platform. Hours after the interview taped, X terminated Lemon's deal.
Outcome: Don Lemon released the interview independently. The episode reinforced perceptions that X under Musk was inhospitable to critical media voices. The ketamine reporting — based on reporting by the Wall Street Journal — drew additional attention to Musk's relationship with controlled substances.
Parties: Elon Musk · Don Lemon · X/Twitter
2024-02-01regulatory
EU Digital Services Act compliance threats
The European Union's Digital Services Act (DSA) required large platforms to submit to independent audits, risk assessments, and removal of illegal content under threat of fines up to 6% of global revenue. X was placed under formal investigation by the European Commission in late 2023 over alleged failures to meet DSA obligations, including insufficient moderation of illegal content and manipulation of the algorithmic recommendation system.
Outcome: Investigations were ongoing as of 2025. X cooperated partially with EU requests while Musk publicly criticized the DSA as censorship. No final fine had been levied by early 2025, but the Commission retained the power to impose significant penalties.
Parties: X/Twitter · European Commission
2023-09-01feud
Anti-Defamation League feud and advertiser pressure
Musk engaged in a sustained public feud with the Anti-Defamation League (ADL) in late 2023, accusing the organization of being primarily responsible for advertiser departures from X by reporting on hate speech on the platform. Musk threatened to sue the ADL and ran polls asking whether the ADL should be sued. A hashtag #BanTheADL briefly trended on X.
Outcome: No lawsuit was filed. The feud intensified scrutiny of hate speech on X/Twitter and drew condemnation from civil rights groups. Musk later met with Israeli Prime Minister Netanyahu and walked back some of his rhetoric, though the feud with civil society groups that monitor the platform's content continued.
Parties: Elon Musk · X/Twitter · ADL · advertisers
2022-12-02scandal
The Twitter Files — internal moderation document release
Beginning in December 2022, Musk granted selected journalists access to Twitter's internal communications and moderation records, released in a series of threads dubbed the 'Twitter Files.' The files revealed internal debates over the suppression of the Hunter Biden laptop story, the mechanics of shadow banning, the decision process behind Donald Trump's ban, and extensive coordination between Twitter and federal agencies including the FBI and DHS.
Outcome: The Twitter Files became a major right-wing media story and were cited extensively in congressional hearings. Critics argued the files were selectively released to support a political narrative; supporters argued they proved systemic censorship. Several journalists involved — including Matt Taibbi — testified before the House Judiciary Committee.
Parties: Twitter/X · Elon Musk · Matt Taibbi · Bari Weiss · FBI · DHS
2022-11-04lawsuit
Twitter mass layoffs — WARN Act class action
Within days of completing the Twitter acquisition, Musk laid off approximately 50% of the workforce (~3,700 people) with little notice. Former employees filed a federal class-action lawsuit alleging violations of the WARN Act, which requires 60 days' advance notice for mass layoffs at companies with 100+ employees. Additional suits alleged discrimination against women and people with disabilities in the layoff selection.
Outcome: Twitter/X reached confidential settlements in several WARN Act cases. The full scope of litigation remained ongoing through 2024, with multiple class actions in various stages. The mass layoffs became a defining controversy of the Musk ownership era.
Parties: Elon Musk · Twitter/X · laid-off employees
2022-11-01scandal
Twitter advertiser exodus after acquisition
Following the acquisition and subsequent content moderation changes, numerous major advertisers paused or pulled spending from Twitter/X, including General Mills, GM, Audi, Pfizer, and United Airlines. Musk accused advertisers of attempting to destroy free speech through economic coercion, tweeting at the ADL and other groups he blamed for the exodus. Twitter's ad revenue fell sharply through 2023.
Outcome: X (Twitter) never fully recovered its pre-acquisition advertising base. In November 2023, during an advertiser summit, Musk told departing advertisers to 'go f*** yourself' on stage — further damaging commercial relationships. Linda Yaccarino was hired as CEO in 2023 partly to stabilize advertiser relations.
Parties: Twitter/X · advertisers · Elon Musk
2022-07-12lawsuit
Twitter acquisition — Delaware court battle
After signing a $44B agreement to acquire Twitter in April 2022, Musk attempted to walk away in July, citing concerns about the prevalence of bot accounts on the platform. Twitter sued in Delaware Chancery Court to force completion of the deal. Musk counter-claimed that Twitter had breached representations about its user base.
Outcome: Facing a trial that most legal observers believed Twitter would win, Musk agreed to complete the acquisition at the original $54.20/share price in October 2022. The Delaware case was then dropped. Musk renamed the platform X.
Parties: Elon Musk · Twitter/X · Twitter shareholders
2022-04-27lawsuit
SolarCity acquisition shareholder lawsuit
Tesla shareholders sued Musk and the Tesla board in Delaware Chancery Court, alleging that the $2.6B acquisition of SolarCity in 2016 was a bailout of a failing Musk-family company (Musk, his brother Kimbal, and his cousins the Rive brothers all had stakes) at Tesla shareholder expense. The plaintiffs argued Tesla overpaid for a company facing existential cash problems.
Outcome: Chancellor Kathaleen McCormick ruled in Musk's favor in April 2022, finding that the Tesla board's process, while imperfect, was not a breach of fiduciary duty and that the acquisition price was within a reasonable range. Musk and the board were not required to pay damages.
Parties: Elon Musk · Tesla board · Tesla shareholders
2022-03-01lawsuit
Tesla California sexual harassment class action
A class-action lawsuit filed in California alleged that Tesla's factories and offices had a pervasive culture of sexual harassment, with female employees subjected to groping, lewd comments, and unwanted advances — and that HR routinely dismissed or minimized complaints. The case sought class certification to represent thousands of current and former female employees.
Outcome: Tesla disputed the allegations. The case was ongoing through 2024. It added to a broader pattern of workplace conduct litigation the company faced across multiple jurisdictions.
Parties: Tesla · female Tesla employees
2022-02-01lawsuit
Tesla Fremont racial discrimination lawsuit
In 2022, California's Civil Rights Department (formerly DFEH) filed a lawsuit against Tesla alleging widespread racial discrimination and harassment at the Fremont factory, the company's largest US production facility. The complaint cited hundreds of worker accounts of racial slurs, discriminatory job assignments, and a failure by HR to address complaints — occurring over multiple years.
Outcome: Tesla disputed the allegations. The California CRD case proceeded through litigation. Separately, individual racial discrimination lawsuits against Tesla by Black workers resulted in notable jury verdicts, including a $137M award (later reduced to $15M) in 2021 for former contract worker Owen Diaz.
Parties: Tesla · California Civil Rights Department · Tesla workers
2018-08-07lawsuit
"Funding secured" — SEC lawsuit and settlement
On August 7, 2018, Musk tweeted "Am considering taking Tesla private at $420. Funding secured." The tweet briefly spiked TSLA stock before regulators intervened. The SEC sued Musk and Tesla for securities fraud, alleging the tweet was false and misleading — no firm funding had been secured. The tweet is widely believed to have been partly a marijuana joke ($420) directed at a short-seller.
Outcome: Settled in September 2018 without admitting wrongdoing. Musk and Tesla each paid $20M (total $40M). Musk agreed to step down as Tesla chairman for three years and to have Tesla pre-clear his market-moving tweets — a requirement he later fought in court, with mixed results.
Parties: Elon Musk · Tesla · SEC
2018-07-15lawsuit
"Pedo guy" tweet — Vernon Unsworth defamation suit
During the 2018 Thai cave rescue, British cave diver Vernon Unsworth publicly criticized Musk's proposed mini-submarine as a PR stunt. Musk responded by calling Unsworth a "pedo guy" on Twitter. After initially deleting the tweet, Musk doubled down in private emails to a journalist. Unsworth sued for defamation in federal court in California.
Outcome: Jury verdict for Musk on December 6, 2019. The jury found Musk did not act with actual malice — required because Unsworth was found to be a limited-purpose public figure. Musk was not required to pay damages.
Parties: Elon Musk · Vernon Unsworth
2018-05-01labor
Tesla NLRB rulings on union-busting
The National Labor Relations Board issued multiple rulings against Tesla between 2018 and 2023 for illegal interference with workers' right to organize. Key violations included a 2018 ruling that Musk himself had illegally threatened workers by tweeting that employees who unionized would lose their stock options ('Tesla doesn't pay contractors in stock. Our competitors do.'), and that Tesla had threatened, interrogated, and surveilled workers attempting to organize at the Fremont, California factory.
Outcome: NLRB ordered Tesla to post corrective notices and, in some instances, rehire workers who had been illegally terminated. Tesla appealed multiple rulings. The union organizing campaign at Fremont did not succeed in forming a certified union through the relevant period.
Parties: Tesla · Elon Musk · NLRB · UAW
2018-01-01regulatory
Tesla Autopilot fatalities — NHTSA investigations
A series of fatal accidents involving Tesla vehicles operating in Autopilot or Full Self-Driving mode prompted NHTSA to open multiple special crash investigations beginning in 2018. By 2022 NHTSA had opened a formal defect investigation covering ~830,000 Tesla vehicles. The agency questioned whether Autopilot's driver-monitoring system was sufficient to prevent driver inattention.
Outcome: Tesla issued OTA software updates addressing some NHTSA concerns. In early 2023 the agency upgraded its investigation to an engineering analysis. As of 2025 litigation from individual crashes remains ongoing. Musk consistently maintained that Teslas with Autopilot are statistically safer than human-driven cars.
Parties: Tesla · NHTSA · NTSB
