Oklo
Fast-reactor startup, long chaired by Sam Altman, targeting data-center power.
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Oklo develops the Aurora liquid-metal fast reactor (15–75 MW class) with a build-own-operate model and an announced customer pipeline dominated by data centers — including a 12 GW master agreement with Switch. Sam Altman chaired its board from its SPAC listing until stepping back in 2025. First power at its Idaho site is targeted for late this decade; no reactor is licensed yet.
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Record reviewed as of 2026-01-15 — see Methodology.