OKLO

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Oklo Inc. is a designer of advanced nuclear reactors based in Santa Clara, California. Founded in 2013 by Jacob and Caroline DeWitte, Oklo Inc. focuses on fast-fission power plants. OpenAI co-founder Sam Altman served as Chairman of the Board of Directors, but stepped down in April 2025 to 'avoid a conflict of interest ahead of talks between his company and the nuclear start-up on an energy supply agreement.'

https://oklo.com