ref/sam-altman bio
Biography
From a Macintosh at age eight in St. Louis to the CEO of OpenAI — the documented arc, without myth-making.
Childhood and education
Samuel Harris Altman was born on 22 April 1985 in Chicago, Illinois, and raised in St. Louis, Missouri. His mother, Connie Gibstine, is a dermatologist; his father, Jerry Altman, worked as a real-estate broker. He has three siblings, including brothers Jack (CEO of the HR-software company Lattice) and Max.
Altman has said he received his first computer, an Apple Macintosh, at age eight, and that he learned to program and take apart hardware as a teenager. He attended the John Burroughs School, a private preparatory school in St. Louis, where classmates and teachers later described him as intensely focused on computers and ideas.
In 2003 he enrolled at Stanford University, studying computer science. He left after two years — the full story is on The Stanford Dropout page.
Loopt (2005–2012)
At nineteen, Altman co-founded Loopt, a location-based social networking service for mobile phones, with Stanford friends Nick Sivo and Alok Deshpande. Loopt was part of Y Combinator’s first-ever batch in the summer of 2005 — Altman applied at Paul Graham’s invitation after dropping out.
Loopt raised more than $30 million in venture funding but never broke through as a consumer product; the founding team later described the market as arriving years before smartphones made location-sharing natural. In March 2012, Loopt was acquired by Green Dot Corporation for $43.4 million. Altman was 26. See Loopt.
The investor years (2012–2014)
After Loopt, Altman did not start another company immediately. Instead he became a full-time startup investor — first as a partner at the seed fund Hydrazine Capital (founded with his brother Jack), then as a part-time partner at Y Combinator in 2011. His angel investments from this period included early checks into Airbnb, Stripe, Reddit, Asana, Pinterest, Teespring, Zenefits, and Instacart — a portfolio that would later be valued in the billions. See The Investor.
President of Y Combinator (2014–2019)
In February 2014, Altman succeeded Paul Graham as president of Y Combinator. Over five years he:
- expanded each batch and professionalized the accelerator’s operations;
- launched YC Continuity (2015), a growth-stage fund that began at $700 million;
- started Y Combinator Research (later OpenResearch), a nonprofit arm funding work on basic income, the future of computing, and AI safety;
- oversaw batches that included now-major companies such as Cruise, Ginkgo Bioworks, and others.
He stepped down in March 2019 to focus on OpenAI. See Y Combinator.
OpenAI (2015–present)
In December 2015, Altman co-founded OpenAI as a nonprofit artificial-intelligence research laboratory, alongside Elon Musk, Greg Brockman, Ilya Sutskever, John Schulman, Wojciech Zaremba, and others, backed by a widely reported $1 billion pledge from its founders and backers.
Altman was initially a co-chair. In March 2019 he became CEO, the same month OpenAI created its unusual “capped-profit” subsidiary, OpenAI LP, to raise the capital that frontier AI training would require. Microsoft invested $1 billion in July 2019, then a reported $10 billion multi-year commitment in January 2023, eventually totaling over $13 billion in investment and cloud credit arrangements.
Under Altman, OpenAI released GPT-3 (June 2020), ChatGPT (30 November 2022), GPT-4 (March 2023), and subsequent models — making Altman the public face of the generative-AI boom. In November 2023 the nonprofit board removed him as CEO; he was reinstated five days later after an employee revolt and investor pressure. The full factual account is on The Board Crisis.
Side projects
Parallel to OpenAI, Altman co-founded Tools for Humanity / Worldcoin (2019, with Alex Blania), an identity-and-cryptocurrency project built around iris-scanning “Orbs” (see Worldcoin); chaired the advanced-fission company Oklo; and led a $375 million investment in the fusion company Helion Energy (2021) (see The Energy Bets).
Personal life
Altman married software engineer Oliver Mulherin in January 2024 in Hawaii. In February 2025 the couple announced the birth of their son. Altman keeps his family life largely private; where public allegations touch his family, they are handled factually and briefly on Myth vs. Record.
Source notes
- Birth date and family background: widely reported in profiles (e.g., The New Yorker, 2016; New York Magazine, 2023).
- Loopt acquisition price ($43.4M, March 2012): Green Dot Corporation disclosures, contemporary press.
- Y Combinator presidency (Feb 2014–Mar 2019), Continuity fund, OpenAI founding ($1B pledge, Dec 2015), CEO appointment (Mar 2019), Microsoft investments: contemporary reporting; see Sources.
- Personal details (marriage Jan 2024; son Feb 2025): the couple’s own public announcements as reported.
- Where this biography summarizes deeper pages, those pages carry fuller citations.