Elon Reeve Musk (; born June 28, 1971) is a businessman and investor known for his key roles in the space company SpaceX and the automotive company Tesla, Inc. Other involvements include ownership of X Corp., the company that operates the social media platform X (formerly Twitter), and his role in the founding of the Boring Company, xAI, Neuralink, and OpenAI. He is one of the wealthiest individuals in the world; as of November 2024 Forbes estimates his net worth to be US$290 billion. Musk was born in Pretoria, South Africa, to Maye (née Haldeman), a model, and Errol Musk, a businessman and engineer. Musk briefly attended the University of Pretoria before immigrating to Canada at the age of 18, acquiring citizenship through his Canadian-born mother. Two years later he matriculated at Queen's University at Kingston in Canada. Musk later transferred to the University of Pennsylvania and received bachelor's degrees in economics and physics. He moved to California in 1995 to attend Stanford University, but never enrolled in classes and, with his brother Kimbal, co-founded the online city guide software company Zip2. The startup was acquired by Compaq for $307 million in 1999. That same year, Musk co-founded X.com, a direct bank. X.com merged with Confinity in 2000 to form PayPal. In 2002 Musk acquired US citizenship. That October eBay acquired PayPal for $1.5 billion. Using $100 million of the money he made from the sale of PayPal, Musk founded SpaceX, a spaceflight services company, in 2002. In 2004, Musk was an early investor in electric-vehicle manufacturer Tesla Motors, Inc. (later Tesla, Inc.), providing most of the initial financing and assuming the position of the company's chairman. He later became the product architect and, in 2008, the CEO. In 2006, Musk helped create SolarCity, a solar energy company that was acquired by Tesla in 2016 and became Tesla Energy. In 2013, he proposed a hyperloop high-speed vactrain transportation system. In 2015, he co-founded OpenAI, a nonprofit artificial intelligence research company. The following year Musk co-founded Neuralink, a neurotechnology company developing brain–computer interfaces, and The Boring Company, a tunnel construction company. In 2018 the U.S. Securities and Exchange Commission (SEC) sued Musk, alleging that he had falsely announced that he had secured funding for a private takeover of Tesla. To settle the case Musk stepped down as the chairman of Tesla and paid a $20 million fine. In 2022, he acquired Twitter for $44 billion, merged the company into the newly-created X Corp. and rebranded the service as X the following year. In March 2023, Musk founded xAI, an artificial-intelligence company. Musk's actions and expressed views have made him a polarizing figure. He has been criticized for making unscientific and misleading statements, including COVID-19 misinformation, promoting right-wing conspiracy theories, and endorsing an antisemitic theory; he has since apologized for the latter. His ownership of Twitter has been controversial because of the layoffs of large numbers of employees, an increase in hate speech, misinformation and disinformation posts on the website, and changes to website features, including verification. Musk has been active in American politics as a vocal and financial supporter of Donald Trump, becoming Trump's second-largest individual donor in October 2024.