Billionaire Profile
Sam Altman
Global Rank
#1237

Image: Public domain | via Wikimedia Commons

Sam Altman

CEO, OpenAI
UNITED STATES
Real-Time Net Worth
$3.489B
Estimated based on OpenAI stock value as of April 21, 2026
+0.36% (24h)
Age
40
Source
Investments
Industry
finance-investments
Citizenship
UNITED STATES

Biography

Sam Altman, born in 1985, is an American entrepreneur and investor, currently serving as the CEO of OpenAI, a leading artificial intelligence research company. His net worth is estimated at $2 billion, primarily derived from his early investments and venture capital activities. He co-founded the location-based social networking app Loopt and later served as the president of Y Combinator, a prominent startup accelerator. Altman's career is marked by his ability to identify and invest in transformative technologies, including stakes in companies like Stripe, Reddit, and Helion Energy. He is known for his bold bets and leadership in the AI field, overseeing the launch of ChatGPT and being recognized as a Time's Person of the Year 'Architect of AI'. He married Oliver Mulherin in January 2024.

Fact Checked
Verified by Editorial Team
Live Data
Updated 4/21/2026

Wealth Over Time

In-Depth Profile

Early Life and Education

Samuel Harris Altman was born on April 22, 1985, in Chicago, Illinois. He moved to St. Louis, Missouri, during his childhood, where he developed an early interest in computers. At age eight, he received his first computer, an Apple Macintosh, and began to learn programming. He attended John Burroughs School and later studied computer science at Stanford University for two years before dropping out in 2005.

Rise to Success

Altman's entrepreneurial journey began in 2005 when he co-founded Loopt, a location-based social networking mobile application. Though Loopt was later acquired, it gave Altman the experience to build a strong business network. In 2011, he joined Y Combinator as a part-time partner and became its president in 2014. During his tenure, Y Combinator supported numerous successful startups. He later co-founded OpenAI in 2015 and became the CEO in 2019.

Key Business Strategies

Altman's wealth stems from his diverse investments, including early stakes in companies like Stripe, Reddit, and Airbnb. He also made significant investments in nuclear fusion company Helion Energy. His investment strategy involves backing innovative startups and identifying transformative technologies. Altman has also diversified his assets across real estate, angel funds, and public equities.

Philanthropy

In May 2024, Altman and his husband, Oliver Mulherin, signed The Giving Pledge, committing to donate a significant portion of their wealth to philanthropic causes.

Career Milestones

2005

Co-founded Loopt

Co-founded Loopt, a location-based social networking mobile application.

2011

Joined Y Combinator

Became a partner at Y Combinator.

2014

President of Y Combinator

Appointed President of Y Combinator.

2019

CEO of OpenAI

Became CEO of OpenAI.

2023

Brief Ousting and Reinstatement

Briefly ousted from OpenAI, then reinstated within a week.

2024

Married Oliver Mulherin

Married Oliver Mulherin.

Philanthropy & Social Impact

General Philanthropy

The Giving Pledge

Undisclosed

Committed to giving away most of their wealth.

Controversies & Challenges

2023

Ousting from OpenAI

Briefly ousted from the CEO position at OpenAI by the board of directors, before being reinstated.