Sam Altman: OpenAI CEO Age, Net Worth & AI Views in 2026
Sam Altman has led OpenAI since 2019. At 41, the Stanford dropout is worth around $2 billion. Here's what happened in his five-day firing and what he said about AI in 2026.
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Sam Altman has led OpenAI, the company that built ChatGPT, since 2019. He’s 41, a college dropout, and his great-grandfather was born in Płock, Poland. In this biography we’ve gathered verified facts: where he came from, what he’s worth, why he was fired and reinstated within five days, and what he said in September 2026 about the pace of AI development. We checked dates and figures on September 17, 2026, in the sources listed at the end; where a number is an estimate, we say so explicitly.
| Who | Samuel Harris Altman, CEO of OpenAI, co-founder of the company |
| Born | April 22, 1985, Chicago; raised in Clayton near St. Louis |
| Education | two years of computer science at Stanford, dropped out in 2005 |
| Previously | co-founder of Loopt (sold for $43.4 million in 2012), president of Y Combinator 2014-2019 |
| Net worth | Bloomberg estimate from March 2024: around $2 billion, mainly from investment funds, not from OpenAI equity |
| Personal | husband of Oliver Mulherin (married 2024), one child, three younger siblings |
From Loopt to Y Combinator
In 2005, as a nineteen-year-old, Altman dropped out of Stanford and founded Loopt, an app that showed friends where you were. He raised over $30 million from investors including Sequoia and Y Combinator, but user numbers never reached critical mass; in March 2012 Green Dot bought the company for $43.4 million. In 2011 he joined the Y Combinator accelerator, and in 2014 he replaced Paul Graham as president. Over five years he invested in hundreds of startups, including Stripe, Airbnb, and Reddit, where he even served as interim CEO for eight days in 2014. His departure from YC in 2019 wasn’t as voluntary as the announcement suggested: Graham later said bluntly that partners had stopped trusting Altman.
OpenAI: Founding, ChatGPT and Five Days in November 2023
OpenAI was founded in 2015 as a nonprofit, established by Altman, Greg Brockman, Elon Musk and others, with pledges totaling a billion dollars, of which $130 million had arrived by 2019. Altman became CEO in 2019 and oversaw the launch of ChatGPT on November 30, 2022. In November 2023 the board fired him overnight, alleging he had not been “consistently candid” with them; after protests from employees and investors he returned five days later and the board was replaced. Musk left the board in 2018 and in 2024 sued OpenAI and Altman, claiming the company had abandoned its mission; OpenAI responded that Musk had contributed $45 million instead of the promised billion.
Net Worth and Investment Portfolio
Altman holds no equity in OpenAI, a point he emphasizes at every hearing. His wealth comes from Hydrazine Capital (founded with his brother Jack in 2012) and stakes in over 400 companies, valued at around $2.8 billion in June 2024. His biggest bets outside AI: nuclear fusion (he chairs the board of Helion Energy), life extension (Retro Biosciences), supersonic aircraft (Boom), and Tools for Humanity, the company behind the Worldcoin cryptocurrency and iris scanners, suspended or under investigation by regulators in several countries including Spain, Portugal, and Hong Kong. Until April 2025 he also chaired the board of nuclear company Oklo; he stepped down to avoid conflicts of interest with future OpenAI contracts.
What He Says About AI in September 2026
The most interesting shift in his statements came this month. On September 12, 2026, Altman publicly endorsed an appeal by Dario Amodei, CEO of Anthropic, to slow the development of the most advanced models, and advocated for independent evaluators embedded inside AI companies. This happened a week after an essay by OpenAI’s chief scientist, Jakub Pachocki, who wrote that no lab has sufficient control over models to keep accelerating, and nine days after the launch of GPT-6 Astra. How this appeal looks against Altman’s earlier statements is covered in our articles Sam Altman wants to slow the pace and Altman, Musk and Amodei together: time to slow down.
Google · Your sourcesQuantslant higher in your Google - one clickAdd to preferred sources →Frequently Asked Questions
How old is Sam Altman?
41. He was born April 22, 1985, in Chicago.
Is Sam Altman a billionaire?
Yes, according to Bloomberg as of March 2024, with wealth estimated then at around $2 billion. The value comes from investments, not from OpenAI, where he holds no equity.
Why was he fired from OpenAI?
The board stated in November 2023 that he had not been “consistently candid” with them, without providing details. After pushback from employees and Microsoft, he returned after five days and the board composition was changed.
Sources checked September 17, 2026: Wikipedia EN “Sam Altman” with citations to The New Yorker, Bloomberg Billionaires Index, TechCrunch, and OpenAI communications; our articles about the September 12, 2026 appeal.
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