Samuel Altman

Samuel Altman

Founder at
Hydrazine Capital GP LLC

Net worth: 348 M $ as of 29/06/2026

41 year
Finance
Technology Services
Consumer Services

Profile

Samuel H.
Altman
was the founder of Loopt, Inc., founded in 2005, serving as Chief Executive Officer from 2010 to 2011.
Mr. Altman is the founder of OpenAI Foundation, founded in 2015, holding the title Chief Executive & Financial Officer, Secretary.
Mr. Altman was the founder of OpenAI OpCo LLC, founded in 2019, serving as Chief Executive Officer & Director.
Mr. Altman is the founder of Hydrazine Capital GP LLC, founded in 2012, serving as General Partner.
Mr. Altman is the founder of Tools For Humanity Corp., founded in 2019, serving as Chairman.
Mr. Altman is the founder of OpenAI LLC, founded in 2015, serving as Chief Executive Officer & Director.
Mr. Altman is the founder of OpenAI OpCo LLC, founded in 2015, serving as Chief Executive Officer.
Mr. Altman is also the founder of Merge Labs Corp...
Mr. Altman is Chief Executive Officer at OpenAI Group PBC.
Mr. Altman is Director at Expedia, Inc. Mr. Altman is Director at Teespring, Inc. Mr. Altman is Director at Boom Technology, Inc. Mr. Altman was Chief Executive Officer at OpenAI LLC.
Mr. Altman was Chief Executive Officer & Director at AltC Acquisition Corp.
from 2021 to 2024.
Mr. Altman was Chairman at Oklo, Inc. from 2015 to 2025.
Mr. Altman was Independent Director at Expedia Group, Inc. from 2019 to 2023.
Mr. Altman was Director at Green Dot Corp.
from 2014 to 2016.
Mr. Altman was Director at Reddit, Inc. Mr. Altman was Independent Director at Bridgetown Holdings Ltd. (Hong Kong) from 2020 to 2023.
Mr. Altman was Director at Helion Energy, Inc. Mr. Altman was Independent Director at Bridgetown 2 Holdings Ltd. from 2021 to 2022.
Mr. Altman was Independent Director at Churchill Capital Corp.
VI.
Mr. Altman was President at Y Combinator LLC from 2014 to 2019.
Mr. Altman was Advisor at Apollo Management LP.
Mr. Altman attended Stanford University for undergraduate studies.

Known holdings in public companies

CompanyDateNumber of sharesValuationValuation date
3.82%
05/03/2025 6,650,402 ( 3.82% ) 348 M $ 29/06/2026

Samuel Altman active positions

CompaniesPositionStart
Founder 31/03/2012
Director/Board Member -
Director/Board Member -
Founder 31/12/2018
Director/Board Member -
Founder 31/12/2014
Chief Executive Officer 31/12/2014

Former positions of Samuel Altman

CompaniesPositionEnd
Chairman 22/03/2026
OKLO INC. Chief Executive Officer 30/04/2024
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See the detail of Samuel Altman's experience

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19

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Private companies19

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