Sam Altman

Listed among the co-founders of the brain-computer interface lab when it launched in January 2026; OpenAI, which he runs, took part in its seed round.^{Source [20]Source [21]}

• Co-founded the lab alongside Alex Blania and Sandro Herbig of Tools for Humanity and researchers Tyson Aflalo, Sumner Norman and Mikhail Shapiro.^{Source [19]Source [20]}
• OpenAI, which he runs, wrote the largest check in the $250 million seed round, at an $850 million valuation.^{Source [20]}

Suggest a correction to Merge Labs

Co-founded the company behind World, formerly Worldcoin, with CEO Alex Blania and Max Novendstern, and serves as its chairman.^{Source [17]Source [22]Source [18]}

• Co-founded the company in 2019 with Alex Blania and Max Novendstern; serves as chairman.^{Source [17]Source [22]}
• The company launched the Worldcoin protocol in July 2023 and renamed the project World in October 2024.^{Source [22]Source [18]}

Suggest a correction to Tools for Humanity

Named co-chair with Elon Musk when OpenAI was announced in 2015 and became CEO in 2019. The board removed him as CEO on November 17, 2023, saying he was not consistently candid with it; he returned as CEO that month under a new board and rejoined the board in March 2024 after an outside review.^{Source [1]Source [2]Source [25]Source [26]Source [27]}

• Named co-chair with Elon Musk at OpenAI's launch in December 2015.^{Source [1]}
• Became CEO in 2019, the year OpenAI created its capped-profit OpenAI LP.^{Source [2]}
• Was removed by the board on November 17, 2023 and reinstated as CEO later that month; rejoined the board in March 2024.^{Source [25]Source [26]Source [27]}
• Named TIME's 2023 CEO of the Year after ChatGPT's launch.^{Source [28]}

Suggest a correction to OpenAI

An early investor and chairman from 2015. As CEO of the blank-check company AltC Acquisition Corp., he took Oklo public through a merger in May 2024, then stepped down as chairman in April 2025.^{Source [14]Source [15]}

• Was one of the company's initial investors and chaired its board from 2015.^{Source [14]}
• As CEO of AltC Acquisition Corp., merged it with Oklo, which began trading on the NYSE on May 10, 2024 with about $306 million in gross proceeds.^{Source [14]}
• Stepped down as chairman in April 2025; CEO Jacob DeWitte took the role.^{Source [15]}

Suggest a correction to Oklo

Investor and chairman from 2015; led a $500 million round in 2021 and left the board in March 2026 as Helion and OpenAI explored a partnership.^{Source [13]Source [16]}

• Investor and chairman from 2015.^{Source [13]}
• Led the company's $500 million round in November 2021.^{Source [13]}
• Stepped down as board chair in March 2026 so Helion and OpenAI could pursue a partnership; remains an investor.^{Source [16]}

Suggest a correction to Helion

A founder in YC's first batch, he succeeded Paul Graham as president in 2014. He stepped down in March 2019, was described as moving to chairman, and by May 2019 was an advisor when Geoff Ralston became president.^{Source [9]Source [10]Source [24]Source [11]}

• Was a founder in YC's first batch in 2005 and joined as a partner in 2011.^{Source [9]Source [10]}
• Succeeded Paul Graham as president in 2014.^{Source [9]}
• Stepped down in March 2019 to focus on OpenAI and became an advisor when Geoff Ralston was named president in May 2019.^{Source [10]Source [11]}

Suggest a correction to Y Combinator

Set up the venture firm with his brother Jack Altman after selling Loopt; he is listed as director on its funds' disclosure documents.^{Source [7]}

• Set up the firm in 2012 after the Loopt sale with a first fund of about $20 million anchored by Peter Thiel.^{Source [8]Source [7]}
• Led a $50 million Reddit round in 2014 and took a Reddit board seat.^{Source [8]}
• Is listed as director on the firm's fund disclosure documents; a fourth fund was raised in 2023 with the University of Michigan as its only outside investor.^{Source [7]}

Suggest a correction to Hydrazine Capital

Co-founded the location-sharing startup in Y Combinator's first batch in 2005 and was CEO when Green Dot bought it for $43.4 million in cash in 2012.^{Source [5]Source [6]}

• Left Stanford in 2005 to start Loopt in Y Combinator's first batch.^{Source [4]Source [5]}
• Raised venture funding from Sequoia Capital and New Enterprise Associates.^{Source [5]}
• Sold the company to Green Dot for $43.4 million in cash in March 2012.^{Source [6]}

Suggest a correction to Loopt