American entrepreneur, investor, programmer, and artificial intelligence advocate; CEO of OpenAI; former president of Y Combinator; co-founder of Loopt and Worldcoin; leading figure in AI development, safety research, and technological accelerationism
Born Samuel Harris Altman on April 22, 1985, in Chicago, Illinois, to dermatologist mother Connie Gibstine and real estate broker father Jerry Altman in a Jewish family; eldest of four siblings (brothers Max and Jack, sister Annie); early environment provided intellectual stimulation and exposure to professional ambition.
Early childhood in Chicago; family emphasized education and curiosity; young Sam showed signs of high intelligence and independent thinking in a supportive household.
Continued family life in Chicago; parents fostered analytical mindset through books, discussions, and problem-solving activities.
Ongoing early development; became vegetarian as a young child, a choice he maintained lifelong reflecting early ethical considerations.
Family relocated to Clayton, Missouri (St. Louis suburb) in 1989; adjusted to new Midwestern environment with access to strong public education and community resources.
Settled in St. Louis area; attended local elementary school; demonstrated early fascination with technology and science.
Continued elementary education; family home encouraged reading and exploration; began showing strong interest in computers and gadgets.
Ongoing schooling in Missouri; parents supported intellectual pursuits; deepened curiosity about how machines worked.
Received first Apple Macintosh computer; taught himself programming, disassembled hardware to understand internals; marked beginning of lifelong passion for computing and software development.
Intensified self-directed learning in programming; spent hours experimenting with code and building small projects on personal computer.
Continued elementary and middle school; excelled in math and science; explored early internet and online communities.
Ongoing education; developed reputation as tech-savvy child among peers; family supported hands-on technical hobbies.
Transitioned to middle school; deepened programming skills; began envisioning technology's potential to connect people.
Enrolled at John Burroughs School, a prestigious private preparatory in Ladue, Missouri; thrived in rigorous academic environment with focus on critical thinking.
Continued at John Burroughs; participated in science and technology clubs; honed analytical and debating skills.
Ongoing high school; explored entrepreneurship ideas; maintained strong interest in software and emerging mobile tech.
Deepened involvement in computing projects; prepared for college applications with focus on computer science.
Came out as gay during high school assembly after opposing a speaker on National Coming Out Day; demonstrated early courage and advocacy for LGBTQ+ issues.
Senior year at John Burroughs; graduated with strong academic record; accepted to Stanford University for computer science.
Freshman year at Stanford; immersed in Silicon Valley tech culture; began conceptualizing startup ideas focused on location-based services.
Dropped out of Stanford after two years to co-found Loopt, a location-based social networking app; raised initial venture funding including from Y Combinator; served as CEO in intense startup environment.
Grew Loopt rapidly; secured investments from Sequoia Capital and others totaling over $30 million; navigated early mobile app challenges.
Continued leading Loopt; focused on user growth and product iteration amid rising smartphone adoption.
Ongoing Loopt development; built team and partnerships; personal relationship with co-founder Nick Sivo.
Expanded Loopt features; competed in emerging social mobile space.
Intensified fundraising and scaling efforts for Loopt; gained recognition in Silicon Valley startup circles.
Joined Y Combinator as part-time partner; provided mentorship to new batches while running Loopt.
Loopt acquired by Green Dot Corporation for $43.4 million; co-founded Hydrazine Capital venture fund with brother Jack using proceeds; invested heavily in YC companies.
Managed Hydrazine investments; served briefly as interim CEO of Reddit for eight days; deepened involvement in startup ecosystem.
Became full-time president of Y Combinator; aimed to scale program and focus on hard-tech startups.
Co-founded OpenAI as nonprofit research lab with Elon Musk, Greg Brockman, and others to advance AI safety; continued expanding YC.
Led YC growth initiatives; contributed to YC Research and Continuity fund; attended high-profile events like Bilderberg.
Oversaw YC's expansion to hundreds of startups annually; emphasized AI and biotechnology investments.
Managed OpenAI board transitions including Musk's departure; deepened focus on AGI safety research.
Transitioned to full-time CEO of OpenAI; oversaw shift to capped-profit structure; co-founded Worldcoin for universal basic income and identity verification.
Led OpenAI through early GPT model developments; funded COVID-19 clinical trial initiatives; expanded investment portfolio including nuclear fusion (Helion).
Published influential blog posts like 'Moore's Law for Everything'; supported political initiatives including Andrew Yang's campaign; invested in charter cities.
OpenAI launched ChatGPT preview based on GPT-3.5, achieving rapid adoption; testified on AI regulation; global tours meeting world leaders.
Briefly ousted as OpenAI CEO in November board crisis over communication concerns; massive employee support led to reinstatement within days with new board; Microsoft partnership strengthened.
Married engineer Oliver Mulherin in January Hawaii ceremony after long-term relationship; committed to Giving Pledge; addressed AI safety concerns publicly; expanded investments in longevity and energy.
Welcomed son with husband Oliver; named among Time's 2025 Person of the Year 'Architects of AI'; predicted AI agents joining workforce and impacting mental health; hired for AI preparedness roles; discussed superintelligence timelines; hosted political fundraisers; family denied sister's abuse allegations; net worth ~$2.1 billion amid ongoing OpenAI advancements and global AI influence.