3 companies in Advanced nuclear, privately held.
Radiant
Advanced nuclear · Developer of the Kaleidos portable microreactor
Latest (Dec 30, 2025): Radiant reports $268.8 million of equity sold in a private offering
Open profile →TerraPower
Advanced nuclear · Developer of the Natrium sodium-cooled reactor with molten-salt energy storage
Latest (May 23, 2026): Natrium Kemmerer Unit 1: DOE account of the permit and the start of plant construction (construction)
Open profile →Kairos Power
Advanced nuclear · Developer of the fluoride salt-cooled high-temperature reactor (KP-FHR)
Latest (Sep 21, 2026): Hermes 2 Demonstration Plant: Samsung C&T strategic investment in Kairos Power (company level), binding term sheet, subject to regulatory approvals; stated purpose is Hermes 2 delivery (conditional)
Open profile →Coverage is not an offer to invest. Private ownership does not imply available shares. Sector labels are Power Inflection’s own coverage classification, not company claims.
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